TENDER TECHNICAL SPECIFICATION TURNKEY BASED PROJECT FOR HT & LT UNDERGROUND POWER

TENDER TECHNICAL SPECIFICATION
TURNKEY BASED PROJECT FOR HT &
LT UNDERGROUND POWER
DISTRIBUTION NETWORK FOR
SERVICE LINE WORK IN THE AREA OF
BOL GIDC OF BAVLA DIVISION.
PART - II
TECHNICAL SPECIFICATIONS:
INDEX
1.0
11 KV XLPE CABLE, JOINTING KIT & LAYING
OF CABLES
2.0
L.T. CABLES, LAYING OF CABLES
3.0
EARTHING
4.0
HDPE PIPE
5.0
DOUBLE WALLED CORRUGATED (DWC) HDPE
DUCTS
6.0
3-PHASE SMC BOXES FOR 3 PHASE WHOLE
CURRENT METER
7.0
3-PHASE SMC BOX FOR THREE PHASE RING
TYPE CT OPERATED ENERGY METER
8.0
1-PHASE SMC METER BOX FOR SINGLE PHASE
ENERGY METER
9.0
11 KV OUTDOOR LBS METERING CUBICLE
PANEL
1.0: 11 KV XLPE POWER CABLE
SPECIAL INSTRUCTIONS TO BIDDER
Please read following instructions carefully before submitting your bid.
1.
All the drawings, i.e. elevation, side view, plan, cross sectional view etc., in
AutoCAD format and manuals in PDF format, for all items including installation
(civil work) shall be submitted. Also the hard copies as per specification shall be
submitted.
2.
The bidder shall submit Quality Assurance Plan for manufacturing process and
Field Quality Plan with the technical bid.
3.
The bidder shall have to submit all the required type test reports for the offered
item. However, in the event of partial submission or reports older than specified
limit, bidder must submit his confirmation for those type test report/s to be
submitted in the event of an order, without affecting delivery schedule, before
commencement of supply, free of cost. In absence of this confirmation, the
evaluation shall be carried out accordingly as non submission of type test reports.
4.
The bidder must fill up all the point of GTP for offered item/s. Instead of indicating
“refer drawing, or as per IS/IEC”, the exact value/s must be filled in.
5.
All the points other than GTP, which are asked to confirm in technical
specifications must be submitted separately with the bid.
6.
The bidder is required to impart training in view of manufacture, assembly,
erection, operation and maintenance for offered item, at his works, to the
person/s identified by UGVCL, in the event of an order, free of cost. The cost of
logistics will be bear by UGVCL.
7.
Please note that the evaluation will be carried out on the strength of content of
bid only. No further correspondence will be made.
8.
The bidder shall bring out all the technical deviation/s only at the specified
annexure.
9.
The bidder should indicate manufacturing capacity by submitting latest updated
certificate of a Chartered Engineer (CE).
QUALIFYING REQUIREMENT DATA
(For Supply)
Bidder to satisfy all the following requirements.
1)
The principal manufacturer/s of bidder shall be Original Equipment
Manufacturer (OEM). The offered equipment have to be designed,
manufactured and tested as per relevant IS/IEC with latest amendments.
2)
The minimum requirement of manufacturing capacity of OEM for offered
type, size and rating of equipment shall be 7 times tender / bid quantity.
The bidder should indicate manufacturing capacity by submitting latest
updated certificate of a Chartered Engineer (CE).
3)
Equipment proposed shall be of similar or higher rating and in service for a
minimum period of THREE (3) years and satisfactory performance
certificate in respect of this is to be available and submitted.
4)
The bidder should clearly indicate the quantity and Single Value Contract
executed during last FIVE (5) years, for the offered equipment. Bidder
should have executed one single contract during last five years for the
quantity equivalent to tender / bid.
The details are to be submitted in following format,
Sr.
No
ITEMS
SUPPLIED
TO
ORDER
REFERENCE
No. & DATE
ITEMS
QUANTITY
ORDER
FULLY
EXECUTED.
YES/NO
STATUS, IF
ORDER
UNDER
EXECUTION
REMARK
5) Equipment offered shall have Type Test Certificates from Govt
approved/accredited laboratory (accredited based on ISO/IEC Guide 25 /
17025 or EN 45001 by the National accredition body of the country where
laboratory is located), as per IEC / IS / technical specification. All the required
type tests should not be older than 5 (five) years from the date of opening of
technical bid.
TECHNICAL SPECIFICATION FOR
11 kV XLPE POWER CABLE
(CROSS LINKED POLYTHELENE DRY GAS CURED)
SECTION – I
1.1
SCOPE:
1.1.1 This Section of the Specification covers design, manufacturing, testing, packing,
supply & delivery of 11 kV XLPE Dry gas cured insulated power cable for effectively
earthed specification system.
1.2
STANDARDS:
1.2.1 Unless otherwise specified, the cable shall conform in all respect to IS: 7098
(Part-II)-1985 with latest amendment thereof.
1.3
CLIMATIC CONDITIONS:
1.3.1 The climatic conditions under which are cables shall operate satisfactorily are as
follows:
0
(a)
Maximum ambient temperature of air
(b)
Minimum ambient temperature of air in shade
(c)
C
: 50
0
: 4
C
Maximum daily average ambient temperature
0
C
0
C
: 40
(d)
Maximum yearly average ambient temperature
(e)
Maximum relative humidity
(f)
Average number of thunder storm days per annum
: 15
(g)
Average annual rainfall
: 150
(h)
Maximum wind pressure
(i)
Altitudes not exceeding above MSL
(j)
Maximum soil temperature at cable depth
(k)
Maximum soil thermal resistively
%
: 95
cm
Kg/cm2
: 150
mtrs.
0
: 30
0
C
C cm/watt
: 1000
: 30
: 150
1.4
PRINCIPAL PARAMETERS:
1.4.1 11 kV (E) Grade XLPE, 3-Core, power cable shall be of high conductivity, stranded
compacted, H.D. aluminum circular shaped conductor with XLPE (cross linked Poly
Ethylene) Dry/Gas cured insulation provided with shielding of extruded semiconducting materials over conductor and XLPE insulation. Each insulated core shall
have copper tape screen, laid together and provided with common covering of
PVC Inner Sheath (Extruded). Overall galvanized steel strip armour and PVC outer
sheath shall be provided. The specification for manufacture of cable shall be
conforming to IS: 7098 (Part-II) 1985 (latest edition) for 11KV (E), 3-phase, 50 Hz.
Earthed systems.
1.4.2 Outer sheath shall be designed to afford high degree of mechanical protection and
shall also be heat, oil, chemical and weather resistant, Common acid, alkalis and
sealing solution shall not have adverse effect on material of PVC sheath.
1.4.3 Cable shall be suitable for laying in covered trenches and / or buried under-ground
in outdoor.
1.4.4 Cable Parameters :
11 kV
(i)
Voltage grade (Uo / U) kV
: 6.35 / 11
(ii)
Cores (Nos)
: 3
(iii)
Nominal system voltage kV
: 11
(iv)
Highest system voltage kV
: 12
(v)
System frequency
: 50
(vi)
Variation in frequency
(vii)
(a) Maximum allowable temp.
of conductor during
continuous normal
operation at rated full load
current. 0C
Hz
%
(b) Maximum allowable temp.
under short circuit condition
0
C
: +/- 3
: 90
: 250
(viii)
1.2/50 microsecond lightning
impulse withstand voltage wave
value.
kVp
: 75
(ix)
5 Min, Power frequency
: 17
11 kV
withstand voltage
(x)
kV rms
System earthling
1.5
GENERAL TECHNICAL REQUIREMENTS:
1.5.1
Conductor:
: Effectively earthed.
The cable conductor shall be made from high conductivity stranded High
Density aluminum to form compacted circular shaped conductor having
resistance within limits specified in IS: 8130/1984 and any latest
amendment to it.
1.5.2
Conductor shield:
The conductor having semi-conducting screen shall ensure perfectly
smooth profile & avoid concentration of stress. The conductor screen shall
be extruded in the same operation as the insulation. The semi-conducting
polymer shall be cross linked.
1.5.3
Insulation:
The XLPE insulation shall be suitable for 11 kV system voltage and should
be manufactured with Dry / Gas curing process. The bidder shall submit the
description of dry / gas curing process, with the clear inclusion of
equipments / parameters involved. The manufacturing process shall ensure
that the insulation shall be free of voids. The insulation shall withstand
mechanical and thermal stress under steady state and transient operating
conditions. The extrusion method should give very smooth interface
between semi-conducting screen and insulation. The insulation of the cable
shall be of high standard quality generally conforming to IS: 7098 (Part – II)
– 1985 and any latest amendment to it.
1.5.4
Insulation shield:
Non-metallic semi-conducting shield shall be provided over the insulation
to confine electrical field to the insulation. The insulation shield shall be
extruded in the same operation as the conductor shield and the insulation
by suitable extrusion process. The XLPE insulation shield shall be of tended
type. The copper metallic overlapped tape shield shall be provided.
1.5.5.
Filler and Inner-Sheath:
The sheath shall be suitable to withstand the site conditions and the
desired temperature. It shall be of adequate thickness, consistent quality
and free from all defects. The PVC sheath shall be extruded. The material of
fillers and inner-sheath shall be compatible with the temperature ratings of
the cable and shall have no deterious effect on any other component of the
cable. Central PVC filler shall also, be provided with other peripheral PVC
fillers to have proper circular section.
1.5.6
Armour:
Armouring of galvanized steel strip shall be provided. The dimensions of
steel strips shall be as per latest edition of IS: 3975 – 1979.
1.5.7
Outer-Sheath:
Extruded type ST-2 PVC outer-sheath, conforming to IS: 5831-(1984) (latest
edition) over armouring with suitable additives (to prevent attack by
redents & termites), shall be provided.
Outer sheath of all PVC and XLPE cables shall be BLACK in colour and
designed to afford high degree if mechanical protection & shall also be
heat, oil, chemical & weather resistant. The cable sheath also suitable to
protect against rodent and termite attack.
1.5.8
Construction:
1.5.8.1
The cable shall have suitable PVC fillers laid up with insulation cores to
have subsequently circular cross-section before the inner sheath is applied.
The fillers shall be suitable for operating temperature of the cable.
1.5.8.2
All materials used in manufacturing of cable shall be new, unused and of
finest quality. All materials should comply with the requirements / tests as
per applicable IS / IEC specification, Indian Electricity Rules and any other
statutory provision of rules & regulations.
1.5.8.3
The PVC material used in the manufacture of cable shall be of reputed
manufacturer. No recycling of PVC is permitted. The purchaser reserves the
right to ask for documentary evidence of the purchase of various materials,
(to be used for the manufacture of cable) as per checking of quality control.
Quality Assurance plans shall be submitted.
1.5.9
Current Rating:
The indicative values of continuous current carrying capacities at Maximum
conductor temperature of 900 C (for design purpose by field) of the various
sizes of the cables are given below:
1.5.9.1
Continuous Current Carrying
Capacity in Amp (For 11 kV cable)
In Ground
In air
Sr.
No.
Size of 3 Core
Cable (Sq.mm)
1
50
130
140
2
95
185
200
3
150
235
265
4
185
270
310
5
240
305
345
6
300
340
396
Short circuit ratings of various sizes of 3 core cable calculated for duration
of one second at maximum temperature of 2500 C, are given below:
Sr.
No.
Size of 3 Core Cable (Sq.mm)
Conductor short circuit
rating in kA (rms)
(For 11 kV cable)
1
50
4.70
2
95
8.93
3
150
14.1
4
185
17.4
5
240
22.6
6
300
28.2
1.5.9.2
The current rating shall be based on maximum conductor temperature of
900 with ambient site condition specified for continuous operation at the
rated current.
1.5.10
Operation :
1.5.10.1
Cable shall be suitable for operation under frequency variation of +3% and
voltage variation of +10% to -15% and combined frequency - voltage
variation of 10% (absolute sum).
1.5.10.2
Cable shall be suitable for laying in duct or buried underground.
1.5.10.3
Cable shall have heat & moisture resistance properties. These shall be of
type & design with proven record on distribution network service.
1.5.10.4
Length :
The cable shall be supplied in standard drum length of 300 mtrs.  5%
tolerance for all the sizes of cable except for 3 C x 240 mm2 and 3 C x 300
mm2 size cable. The drum length for 3 C x 240 mm2 and 3C x 300 mm2 cable
shall be 200 mtrs. + 5%.
Over all tolerance in total quantity of ordered cables shall be + 2%.
1.5.10.5
Identification Mark :
(i)
The cable drum shall be printed with information as per cl. 21;2 of
IS and ISI Certification mark. Bidder shall submit xerox copy of valid
ISI Licenses with technical bid.
(ii)
For identification of cores, coloured strip of Red, Yellow and Blue
colours shall be used for identification of phases. Following details
of identification shall be embossed at intervals of length of one
meter of cable outer sheath.
(iii)
(a) Name of manufacturer (b) year of manufacture (c) voltage grade
(d) Name of purchaser “UGVCL”.
1.6
TESTS:
1.6.1(A)
Type Tests:
All the cable sizes i.e. items offered should have been fully type tested as
per the relevant standards at any Govt. recognized Laboratory. The bidder
shall furnish three sets of type test reports along with the offer. The Type
test reports shall not be older than FIVE years and shall be valid upto the
expiry of validity of offer.
For any change in design/type, already type tested and the design / type
offered against this specification, the purchaser reserves the right to
demand reputation of type tests without any extra cost.
The purchaser also reserves the right to have tests carried out at his own
cost by an independent agency, whenever there is a dispute regarding the
quality of supply.
1.6.1(B)
The following type test reports shall be furnished with the offer:
(a)
(b)
Tests on conductor :
(i)
Tensile test
(ii)
Resistance test
Tests for armouring strips / wires. :
(c)
Tests for thickness of insulation and sheath. :
(d)
Physical tests for insulation. :
(e)
(i)
Tensile strength and elongation at break.
(ii)
Ageing in air oven
(iii)
Hot set
(iv)
Shrinkage test
(v)
Water absorption
Physical tests on outer seath :
(i)
Tensile strength and elongation at break.
(ii)
Ageing in air oven
(iii)
Shrinkage test
(iv)
Hot deformation
(v)
Bleeding and blooming test
(f)
Partial discharge test
(g)
Bending test
(h)
Dielectric power factor test
i) as a function of voltage
ii) As a function of temperature
(i)
Insulation resistance test (volume resistivity)
(j)
Heating cycle test
(k)
Impulse withstand test
(l)
High voltage test
(m)
Flammability test
1.6.2
Acceptance Test:
1.6.2.1
The selection of sample pieces for acceptance test shall be from 10% drums
of each lot offered for inspection or part thereof. The minimum shall be
one drum.
1.6.2.2
The following acceptance tests shall be carried cut on the selected samples
as per IS: 7098 (Part-II) – 1985.
(a)
Annealing test (for copper)
(b)
Tensile test (for aluminum)
(c)
Wrapping test (for aluminum)
(d)
Conductor resistance test.
(e)
Test for thickness of insulation and sheath
(f)
Hot set test for insulation
(g)
Tensile strength and elongation at break test for insulation and
sheath.
(h)
Partial discharge test (for screened cables only)
(i)
High voltage test for 4 hours (as per cl. No. 19.7.1)
(j)
Insulation resistance (volume resistivity) test.
1.6.2.3
All the acceptance tests shall be carried out by the firm, in the presence of
purchaser’s representative at their works. The firm shall give atleast 15
days’ advance notice to the purchaser to enable him to depute the
engineer for witnessing the tests. The test certificates for acceptance tests
witnessed by inspecting officer/ engineer shall be submitted for approval
before dispatch of material.
1.6.3
Tests:
1.6.3.1
The bidder shall have to submit, well in advance, the test certificates for
the following routine test for approval prior to inspection of the materials
for the complete lot offered for inspection at a time.
(a)
Conductor resistance test
(b)
Partial discharge test
(c)
High-voltage test for 5 minutes [as per Clause 19.7.2 of IS: 7098
(Part-II) – 1985].
1.7
STAGE INSPECTION:
1.7.1
The inspection may be carried out by the purchaser at any stage of
manufacture. The successful bidder shall grant free access to the
purchaser’s representative at reasonable time, when the work is in
progress. Inspection and acceptance, of any cables under this specification
by the purchaser, shall not relieve the supplier of his obligation of
supplying cable in accordance with the specification and shall not prevent
subsequent rejection, if the cables are found defective.
1.7.2
The supplier shall keep the purchaser informed in advance about the
program of manufacturing of cables so that arrangement can be made for
inspection.
1.7.3
The purchaser reserves the right to insist for witnessing the acceptance /
routing tests of the bought out items.
1.8
DOCUMENTATION:
1.8.1
The bidder shall furnish following documents along with his offer.
1.8.1.1
Sectional view, showing the General constructional feature with conductor
/ conductor screen / insulation / armouring / inner and outer sheath etc.
1.8.1.2
Drawing of cable drums with details of material dimension and paint etc
shall be submitted
1.8.1.3
All the required type test reports for offered items tested at any
Government recognized Laboratory as stated under Clause No. 1.6.1 (B).
1.8.1.4
Literature, pamphlets for the record items.
1.8.1.5
List of orders (size wise) executed during last five years for supply of
specified sizes of XLPE cables, supplied to State Electricity Boards, Private
firms & UGVCL & other DISCOMs etc. Along with quantity, value of the
orders, year of supply and delivery schedule. List of orders executed and
under execution shall be submitted separately. The annual turn over in
rupees, of the firms to whom the cables have been supplied during last two
years shall be stated.
1.9
PACKING AND FORWARDING:
1.9.1
The cable shall be wound on wooden drums as per IS: 10418 – 1972 and
packed in drums suitable for vertical / horizontal transport, as the case may
be and shall be suitable to withstand rough handling during transport and
outer storage. The outer surface of the drum shall be painted with white
aluminum paint. Similarly, the inside surface of drum shall have the
protective layer of varnish / paint to protect it from white ants.
1.9.2
The wooden drums shall be reinforced with steel bends and strips for
better protection.
1.9.3
The ends of the cable shall be sealed by means of non-hygroscopic sealing
materials.
1.9.4
The following information may be stenciled on the drum with either water
proof ink or oil paint:
i.
Reference of IS / IEC standard.
ii.
Manufacturer’s name or trademark.
iii.
Type of cable and voltage grade.
iv.
No. of cores.
v.
Nominal cross-sectional area of conductor.
vi.
Cable code.
vii.
Length of cable on the drum
viii.
No. of lengths on the drum (if more than one)
ix.
Direction of rotation of drum (by means of an arrow)
x.
Position of outer end of cable
xi.
Gross weight
xii.
Country of manufacture
xiii.
Year of manufacture
xiv.
Reference of A/T No. & date
xv.
Property of UGVCL
xvi.
Name of consignee and the destination.
The drum may also be marked with ISI Certification Mark.
Over and above, name plate of aluminum of suitable size and thickness,
containing all the above information, shall be fixed on the drum in addition
to the painting.
1.9.5
The firm shall be responsible for any damage to the cables during transit
due to improper and inadequate packing. Wherever necessary, proper
arrangement for lifting, such as lifting hooks, shall be provided. Any cable
found short inside the packing cases shall be supplied by the supplier,
without any extra cost.
1.9.6 Each consignment shall be accompanied by a detailed packing list, containing the
following information:
(a)
Name of consignee
(b)
Details of consignment
(c)
Destination
(d)
Total weight of consignment
(e)
Handling and unpacking instruction
(f)
Bill of materials, indicating contents of each package.
1.10
Erection Specifications for Cable lying:
1.10.1
Scope
Scope includes supply, installation, testing and commissioning of the cable
system.
1.10.2
Standards:
The work shall be carried out by the best workmen with confirmation with
this specification, codes of practice of Indian Standards Institution,
approved drawings and instructions of Engineer in charge or authorized
representative. In case of any conflict between the standards, the
instructions of Engineer in charge shall be binding.
1.10.3
Cable laying:
1.10.3.1
Cables as far as possible shall be laid in complete, uncut lengths from one
termination to the other.
1.10.3.2
Cables shall be properly arranged in the cable tray such that criss crossing is
avoided and final take off to the switchgear is facilitated. Contractors are
responsible for arrangement of cables in cable trench.
1.10.3.3
Temporary ends if any shall be protected against dirt and moisture and
prevents damage to the insulation. Proper PVC or rubber insulating tape
shall be used. Use of friction type or fabric tape is not permitted. Lead
sheathed cables shall be plumbed with lead alloy.
1.10.3.4
Cables shall be handled carefully during installation to prevent damage to
the cables. Protective pipes shall be used as and when required as directed.
1.10.3.5
Insulation resistance test of all the cables shall be taken in presence of
Engineer in charge. Defective cables shall be immediately replaced before
laying of cables of other groups.
1.10.3.6
Suitable GI/HDPE/RCC hume pipes for protection as directed shall be
provided as required. Cable ends shall be carefully drawn through such
pipes to prevent damage to the cable. Radius at bending shall not be less
than the recommended bending radius of the cables specified by the
manufacturer. Standard gauge of pipe filling shall be used for sizing the
pipe.
After installation and testing of cables, conduit ends shall be plugged with a
suitable weatherproof plastic compound/ putty for sealing purpose as
directed. No extra payments shall be allowed for the laying.
1.10.3.7
Prior approvals for cutting holes for laying cable in existing structures and
foundations shall be obtained from the Engineer in charge.
1.10.3.8
At road/railway/canal crossing where cable enters pipe sleeves adequate
bed of sand shall be given so that the cable do not slack and get damaged
by pipe ends.
1.10.3.9
Drum number shall be recorded for each cable in cable schedule. Cables
shall be routed so that they are not subjected to heat from adjacent hot
piping and vessels.
1.10.3.10
Appropriate support shall be provided to prevent sagging of cable as per
cable trench drawing.
1.10.3.11
Supporting angles for cables shall be suitably clamped/tied by means of
nylon cords.
1.10.3.12
The identification marker shall be placed on each cable at every 2 Mtrs
intervals and at every cable joint locations, of adequate size fabricated
from 3 mm thick, 25 mm wide aluminum strip. The marker shall be tied by
nylon string with cable. The marker shall be embossed by letter as stated
below as applicable.
UGVCL- 11 KV – Name of feeder
1.11
Termination:
The 11 kV cable termination/joints shall be done by skilled and experienced
jointers duly approved by the Engineer in charge. Termination including
supply of jointing kit is included in the contractors scope unless specified
otherwise.
Termination kits shall be suitable for termination of the cables to indoor
switchgear or to weather proof cable end box of an outdoor mounted
transformer an outdoor type for termination at poles. The terminating kits
shall preferably be as of the following types.
PUSH ON/Heat shrink type of 3m (M seal) or Raycham make using factory
molded silicone rubber insulators. For outdoor installations weather
shields, shielding ends and any other accessories required should form part
of the kit.
Straight through jointing kits shall be suitable for underground installation
with uncontrolled backfill and possibility of flooding by water. The jointing
kit shall be preferably of PUSH ON/Heat shrink type of 3m (M seal) or
Raycham make.
1.11.1
Tests:
Before energizing the insulation resistance of every circuit shall be
measured from phase to phase and from phase to ground with 2.5/5 kV
Megger both before and after backfilling.
D.C High voltage 18 kV test shall be conducted after installation on the
following and test results to be recorded as per UGVCL format in presence
of Engineer in charge.
a) All cables above 1100 volts.
Type tests are to be carried out at manufacturer’s works for quality
approval of termination/jointing kits. Following tests confirming to the
latest IS 13573 and or IEC 502.2, 466 and VDE 0278 and C 81 specifications.
The report of last three years type tests result shall be submitted for
approval of the Kits. Terminations shall be kept open so that switchgears,
transformers etc are not subjected to test voltage.
Tests for termination/jointing kits:
Indoor & Joint IS 13573
1) Conductor Resistance Test
2) Impact Test
3) AC High Voltage Test ( Dry )
4) Partial Discharge Test
5) Impulse with stand test
6) AC Voltage life test with cyclic current
loading
7) Partial Discharge Test
8) AC Voltage life test with cyclic current
loading
9) Thermal Short circuit test
10) AC Voltage life test with cyclic current
loading
11) Conductor Resistance Test
12) Impulse with stand test
13) D.C.High Voltage test
Out Door IS 13573
1) Conductor Resistance Test
2) AC High Voltage Test ( Dry )
3) Wet Power frequency test
4) Partial Discharge Test
5) Impulse with stand test
6) AC Voltage life test with cyclic current
loading
7) Partial Discharge Test
8) AC Voltage life test with cyclic current
loading
9) Thermal Short circuit test
10) AC Voltage life test with cyclic current
loading
11) Water Tightness Test for Out door
12) Conductor Resistance Test
13) Impulse with stand test
14) D.C.High Voltage test
Indoor as per VDE 0278
1) Partial Discharge Test
2) Partial Discharge Test
3) Conductor Resistance Test
4) Partial Discharge Test
5) AC High Voltage Test ( Dry )
6) Tan Delta as a Function of Voltage &
Capacitance.
7) Tan Delta as a Function of temperature
8) Impulse with stand test
9) AC Voltage life test with cyclic current
loading
10) Partial Discharge Test
11) Tan Delta as a Function of Voltage &
Capacitance.
12) AC Voltage life test with cyclic current
loading
13) Thermal Short circuit test
14) AC Voltage life test with cyclic current
loading
15) Partial Discharge Test
16) Conductor Resistance Test
17) Impulse with stand test
18) D.C.High Voltage test
Out door Termination VDE 0278
1) Partial Discharge Test
2) Partial Discharge Test
3) Conductor Resistance Test
4) Impact Test
5) Wet power frequency AC High Voltage Test
6) Partial Discharge Test
7) Tan Delta as a Function of Voltage &
Capacitance.
8) Tan Delta as a Function of temperature
9) Impulse with stand test
10) AC Voltage life test with cyclic current
loading
11) Partial Discharge Test
12) Tan Delta as a Function of Voltage &
Capacitance.
13) AC Voltage life test with cyclic current
loading
14) Short circuit test
15) AC Voltage life test with cyclic current
loading
16) Conductor Resistance Test
17) Impulse with stand test
18) D.C.High Voltage test
19) Dynamic short circuit
20) Impulse with stand test
21) D.C.High Voltage test
As per C - 81
1) Impact Test
2) Insulation Resatance Test
3) A.C High Voltage Test
4) Insulation Resatance Test
5) Heat shock Test
Test after Heat shock Test
6) Insulation Resistance Test
7) A.C High Voltage Test
8) Insulation Resatance Test
9) Elecric Heat cycle Test
Evaluation after Electrical heat cycle Test
10) Insulation Resistance Test
11) A.C High Voltage Test
12) Insulation Resistance Test
After Sheath Damage Test
13) Elecric Heat cycle Test
Evaluation after Electrical heat cycle Test & sheath
damage
14) Insulation Resistance Test
15) A.C High Voltage Test
16) Insulation Resatance Test
17) Examination Of Joint
1.12
TECHNICAL AND GUARANTEED PARTICULARS:
The bidder shall furnish all Guaranteed Technical Particulars, as called for,
in Appendix - I of this Specification. Particulars, which are subject to
guarantee, shall be clearly identified. Offer not containing these in
formations will not be considered for acceptance.
1.13
PERFORMANCE CERTIFICATE:
Bidders shall also submit performance reports for the specified size of
cables supplied to other State Electricity Boards / reputed firms, with the
clear indication of the period since when the cables performed satisfactory
service.
1.14
LEGIBLE SUBMISSION:
Only required relevant, legible documents shall be submitted to avoid
delay due to back reference.
APPENDIX – I
SCHEDULE OF GUARANTEED TECHNICAL PARTICULARS FOR 11 KV XLPE POWER CABLE
(To be filled in and signed by the Bidder)
1.00.0
GENERAL:
1.01.0
Name of Manufacturer
:
1.02.0
Place of Manufacturing
:
1.03.0
Applicable standard IS/IEC
:
1.04.0
Design ambient temperature 0C
:
1.05.0
Cable particulars, whether, confirmed, :
as per clause 1.5 of Section I of
Technical Specification (Yes/No)
Note:
(Fill – up separate column for the following particulars for each type & size of
cable)
2.00.0
CABLES:
2.01.0
Voltage grade (Uo / U)
2.02.0
Whether suitable for neutral earthed / :
unearthed System
2.03.0
Permissible voltage & frequency :
variation for satisfactory operation
2.04.0
Nos. of cores & size
:
:
2.05.0
Continuous current carrying capacity
2.05.1
For standard condition as per IS
2.05.2
:
1) In air
(Amp.)
:
2) In ground
( “ )
:
3) In duct
( “ )
:
4) In trench
( “ )
:
For site condition
:
1) In air
(Amp.)
:
2) In ground
( “ )
:
3) In duct
( “ )
:
4) In trench
( “ )
:
3.00.0
CONDUCTOR:
3.01.0
Material & its applicable IS.
:
3.02.0
Shape of conductor
:
3.03.0
Nominal cross section area (mm2)
:
3.04.0
Number of wires per core
:
3.05.0
Nominal diameter & cross section area :
of each wire used in each core of the
conductor
4.00.0
CONDUCTOR SCREENING:
4.01.0
Type
:
4.02.0
Material & its applicable IS.
:
4.03.0
Continuous working temp 0C
:
4.04.0
Nominal thickness (mm)
:
5.00.0
INSULATION:
5.01.0
Material & its applicable IS
5.02.0
Thickness of insulation (mm)
:
a) Between cores
:
b) Between cores & inner sheath
:
5.03.0
Tolerance in thickness (percent) of :
insulation
5.04.0
Diameter of core over insulation (mm)
5.05.0
Specific insulation resistance at ninety :
(90) degree Centigrade (Ohm-Cm)
6.00.0
INSULATION SCREENING:
6.01.0
Material & its applicable IS.
6.02.0
Thickness (mm):
:
:
1) Semi-conducting part
:
2) Metallic part (copper tape)
:
6.03.0
Whether overlapping
copper tape
6.04.0
Current carrying capacity
:
a) Continuous (Amps.)
:
b) S.C. current duration of 3-Sec. (KA)
:
6.05.0
Diameter of core over screening (mm)
:
6.06.0
Whether insulation screen is removable :
without the application of heat
7.00.0
FILLER:
7.01.0
Material & its applicable IS
7.02.0
Whether suitable
temperature of Cable
provided
for
for :
:
operating :
Yes/ No
7.03.0
No of fillers provided including central :
filler
8.00.0
INNER SHEATH:
8.01.0
Material & its applicable IS
:
8.02.0
Extruded or wrapped
:
8.03.0
Thickness (mm)
:
8.04.0
Diameter of cable over inner-sheath :
(mm)
9.00.0
ARMOURING:
9.01.0
Material & its applicable IS
:
9.02.0
Type of armouring
:
9.04.0
Nos. of strips
:
9.05.0
Diameter of cable over armouring
:
9.06.0
Current carrying capacity of armour
:
a) on continuous basis (Amp)
:
b) short circuit current duration of 1
:
sec (KA)
10.00.0
OUTER SHEATH:
10.01.0
Material & its applicable IS.
:
10.02.0
Thickness of sheath
:
10.03.0
Tolerance on thickness of sheath
:
10.04.0
Over all diameter of cable (mm)
:
10.05.0
Scheme for identification
:
11.00.0
CABLE CONSTANT:
11.01.0
AC resistance per core at operating :
temp. (Ohm/KM)
11.02.0
DC resistance
(Ohm/KM)
11.03.0
Reactance per core (Ohm/KM)
:
11.04.0
Capacitance per core (Microfarad/ KM)
:
11.05.0
Insulation resistance at 270C (Ohm/ KM) :
11.06.0
Loss tangent
:
11.07.0
Dielectric constant
:
11.08.0
Maxi. Cable charging current at normal :
operating voltage (Amp/KM)
per
core
at
200C :
12.00.0
OTHER PARAMETERS:
12.01.0
Recommended
radius (mm)
12.02.0
Safe pulling force
:
12.03.0
Cable weight (Kg./KM)
:
minimum
braiding :
13.00.0
CABLE DRUM:
13.01.0
Net weight of cable (Kg.)
:
13.02.0
Drum weight (Kg.)
:
13.03.0
13.04.0
Shipping weight (Kg.)
:
Whether ISI Mark shall be
indicated on drum (Yes/No)
:
13.05.0
Length of cable per drum (Meter)
:
14.00.0
Whether details shall be embossed as :
stated under Cl. 1.9.4 of Technical
Specification (Yes/No)
15.00.0
Whether type test reports submitted, :
as stated under Cl. 1.6.1 of Technical
Specification (Yes/ No)
16.00.0
Whether drawings submitted as :
specified under Cl. 1.8.1 of Technical
Specification. (Yes/ No)
17.00.0
Whether unpriced schedule of offered :
items submitted with Technical offer.
(Yes/ No)
.
Signature of the Bidder: __________
Name: _______________________
Designation: ___________________
Date: _____________
Authorized common rubber
Stamp / seal of the bidder: _________
GUARANTEED TECHNICAL PARTICULARS
PUSH ON OUT DOOR TERMINATION ON 11KV (E) XLPE CABLE
Sr.
Particulars
Unit
Guaranteed
No.
1.0
MANUFACTURER
2.0
APPLICABLE STANDARDS
3.0
GUARANTEED PARTICULARS
For the nominal(phase to phase)
As per IS:13573
KV
11KV
Maximum system voltage
KV
12KV
A.C. withstand voltage Dry
(ph/ground)
KV
35 KV
Mins
1 Min.
KV
28 KV
Mins
1 Min.
System voltages
3.1
Time duration
A.C. withstand voltage
Wet(ph/ground)
Time duration
3.2
Partial Discharge at 2 Uo
pC
<5pC
3.3
Impulse withstand,1.2/50/Us
kV
75KV
3.4
Load cycle Test
values.
a)Each Cycle-Heating Duration
Hrs
5
Temperature
0C
10
Cooling Duration
Hrs.
3
b)Number of Cycles
c)Continuous phase to ground
117
kV
2.5Uo
Voltage Withstand
Leak Tightness
9 Cycles.
3.5
Thermal Withstand Short circuit
current 1Sec.
ka
3.6
Dynamic short circuit Withstand
Ka peak
3.7
DC Voltage
4.0
KIT PARTICULARS
4.1
Material of the tubing/molded parts
EPDM rubber
4.2
Method of stress control
Pre molded stress cone.
4.3
Method of environmental seal
EPDM rubber.
4.4
List of items included in the Kit
kV
c)Kit shelf life
5.0
Cable Termination Instruction
Manuals
2.55 x Is As per IS:13573
48Kv for 30Mins
Yes
a)For Terminations
b)Allowable kit storage temperature
As per IS:13573
0C
Years
Yes/No
Normal Ambient Temperature
More then 5 Years
Yes
GUARANTEED TECHNICAL PARTICULARS
PUSH ON INDOOR TERMINATION ON 11KV (E) XLPE CABLE
Sr.
Particulars
Unit
Guaranteed
No.
1.0
MANUFACTURER
2.0
APPLICABLE STANDARDS
3.0
GUARANTEED PARTICULARS
For the nominal(phase to phase)
As per IS:13573
KV
11KV
Maximum system voltage
KV
12KV
A.C. withstand voltage Dry
(ph/ground)
KV
35 KV
Mins
1 Min
System voltages
3.1
Time duration
3.2
Partial Discharge at 2 Vo
pC
<5pC
3.3
Impulse withstand,1.2/50/Us
kV
75KV
3.4
Load cycle Test
Hrs
5
0C
100
a)Each Cycle-Heating Duration
Temperature
values.
Cooling Duration
Hrs.
b)Number of Cycles
c)Continuous phase to ground
3
126
kV
2.5Uo
As per IS:13573
Voltage Withstand
3.5
Thermal Withstand Short circuit
current 1Sec.
ka
3.6
Dynamic short circuit Withstand
Ka peak
3.7
DC Voltage
4.0
KIT PARTICULARS
4.1
Material of the tubing/molded parts
EPDM rubber.
4.2
Method of stress control
Pre molded stress cone.
4.3
Method of environmental seal
EPDM rubber.
4.4
List of items included in the Kit
kV
a)For Terminations
b)Allowable kit storage temperature
c)Kit shelf life
5.0
Cable Termination Instruction
Manuals
2.55 x Is As per IS:13573
48Kv for 30Mins.
Yes.
0C
Years
Yes/No
Normal Ambient Temperature.
More then 5 Years.
Yes
GUARANTEED TECHNICAL PARTICULARS
HEAT SHRINK OUT DOOR TERMINATION ON 11KV (E) XLPE CABLE
Sr.
Particulars
Unit
Guaranteed
No
1.0
MANUFACTURER
2.0
APPLICABLE STANDARDS
3.0
GUARANTEED PARTICULARS
3.1
For the nominal(phase to phase)
As per IS:13573
KV
11KV
Maximum system voltage
KV
12KV
A.C. withstand voltage Dry
(ph/ground)
KV
35 KV
Mins
1 Min
KV
28 KV
Mins
1 Min
System voltages
3.2
Time duration
A.C. withstand voltage
Wet(ph/ground)
Time duration
3.3
Partial Discharge at 2 Vo
pC
<5pC
3.4
Impulse withstand,1.2/50/Us
kV
75KV
values.
3.5
Load cycle Test
a)Each Cycle-Heating Duration
Hrs
5
Temperature
0C
100
Cooling Duration
Hrs.
3
b)Number of Cycles
c)Continuous phase to ground
117
kV
2.5Uo
Voltage Withstand
3.6
Leak Tightness
9 Cycles.
3.7
Thermal Withstand Short circuit
current 1Sec.
ka
3.8
Dynamic short circuit Withstand
Ka peak
3.9
DC Voltage
4.0
KIT PARTICULARS
4.1
Material of the tubing/molded
parts
Polyolefin
4.2
Method of stress control
High permittivity Material.
4.3
Method of environmental seal
H.S. Anti-tracking Tubes.
4.4
Allowable Kit storage Temperature
4.5
Shelf life of H.S components
5.0
Cable Termination Instruction
Manuals
kV
0C
Years
Yes/No
As per IS:13573
2.55 x Is As per IS:13573
48Kv for 30Mins.
Normal Ambient Temperature.
More then 5 Years.
Yes
GUARANTEED TECHNICAL PARTICULARS
HEAT SHRINK IN DOOR TERMINATION ON 11KV (E) XLPE CABLE
Sr.
Particulars
Unit
Guaranteed
No
1.0
MANUFACTURER
2.0
APPLICABLE STANDARDS
3.0
GUARANTEED PARTICULARS
3.1
For the nominal(phase to phase)
As per IS:13573
KV
11KV
Maximum system voltage
KV
12KV
A.C. withstand voltage Dry
(ph/ground)
KV
35 KV
Mins
1 Min
pC
<5pC
System voltages
3.2
Time duration
3.3
Partial Discharge at 2 Vo
values.
3.4
Impulse withstand,1.2/50/Us
kV
75KV
3.5
Load cycle Test
Hrs
5
Temperature
0C
100
Cooling Duration
Hrs.
3
a)Each Cycle-Heating Duration
b)Number of Cycles
c)Continuous phase to ground
126
kV
2.5Uo
As per IS:13573
Voltage Withstand
3.6
Thermal Withstand Short circuit
current 1Sec.
ka
3.7
Dynamic short circuit Withstand
Ka peak
3.8
DC Voltage
4.0
KIT PARTICULARS
4.1
Material of the tubing/molded
parts
Polyolefin
4.2
Method of stress control
High permittivity Material.
4.3
Method of environmental seal
H.S. Anti-tracking Tubes.
4.4
Allowable Kit storage Temperature
4.5
Shelf life of H.S. components
Years
5.0
Cable Termination Instruction
Manuals
Yes/No
kV
0C
2.55 x Is As per IS:13573
48Kv for 30Mins.
Normal Ambient Temperature.
More then 5 Years.
Yes
GUARANTEED TECHNICAL PARTICULARS
HEAT SHRINK STRAIGHT THROUGH JOINT ON 11KV (E) XLPE CABLE
Sr.
Particulars
Unit
Guaranteed
No.
1.0
MANUFACTURER
2.0
APPLICABLE STANDARDS
3.0
GUARANTEED PARTICULARS
For the nominal(phase to phase)
As per IS:13573
KV
11KV
Maximum system voltage
KV
12KV
A.C. withstand voltage Dry
(ph/ground)
KV
35 KV
Mins
1 Min.
KV
28 KV
Mins
1 Min.
System voltages
3.1
Time duration
A.C. withstand voltage
Wet(ph/ground)
Time duration
values.
3.2
Partial Discharge at 2 Uo
pC
<5pC
3.3
Impulse withstand,1.2/50/Us
kV
75KV
3.4
Load cycle Test
Hrs
5
Temperature
0C
100
Cooling Duration
Hrs.
3
a)Each Cycle-Heating Duration
b)Number of Cycles
c)Continuous phase to ground
63
kV
2.5Uo
KV
60Nos.at 2.5 Uo. as per above cycles.
As per IS:13573
Voltage Withstand
Water tightness test
3.5
Thermal Withstand Short circuit
current 1Sec.
ka
3.6
Dynamic short circuit Withstand
Ka peak
3.7
DC Voltage
4.0
KIT PARTICULARS
4.1
Material of the tubing/molded parts
Polyolefin.
4.2
Method of stress control
High permittivity Material.
4.3
Method of environmental seal
H.S. Black Insulating Tubes.
4.4
List of items included in the Kit
kV
c)Kit shelf life
5.0
Cable Termination Instruction
Manuals
48Kv for 30Mins
Yes/No
a)For Terminations
b)Allowable kit storage temperature
2.55 x Is As per IS:13573
Yes
0C
Years
Yes/No
Normal Ambient Temperature
More then 5 Years
Yes
2.0 LT Cable, Cable Accessories
1. GENERAL CONSTRUCTION
1.1. The cables shall be suitable for laying in trenches, ducts, and conduits and for underground
buried installation with uncontrolled backfill and possibility of flooding by water and chemicals.
1.2. Outer sheath of all PVC and XLPE cables shall be YELLOW in colour and designed to afford
high degree if mechanical protection & shall also be heat, oil, chemical & weather resistant. The
cable sheath also suitable to protect against rodent and termite attack.
1.3. Sequential marking of length of the cable in meters shall be provided on the outer sheath
at every one meter. The embossing/engraving shall be legible and indelible.
1.4. The overall diameter of the cables shall be strictly as the values declared in the technical
information furnished along with bids subject to a maximum tolerance of +2&-2mm upto overall
diameter of 60mm & +/-3mm for overall diameter beyond 60 mm.
1.5. PVC / Rubber end caps shall be supplied free of cost for each drum with a minimum of eight
per thousand meter length. In addition, ends if the cables shall be properly sealed with caps
to avoid ingress of water during transportation and storage.
1.6. PVC Cables
1.6.1. All power / control cables for use on medium voltage systems shall be heavy duty
type , 1,100V grade with aluminum / copper conductor, PVC insulted, inner-sheathed,
armoured and overall PVC sheathed as detailed below:
1.6.2. The conductors shall be “stranded” for both aluminium and copper cables.
Conductors of nominal area less than 25 sq. mm shall be circular only. Conductors of nominal
area 25 sq.mm and above may be circular of shaped. Cables with reduced neutral conductor shall
have sizes as per Table 1 of IS 1554(Part-1). If specified in the data sheet, the copper Cables
shall be tinned.
1.6.3. The core insulation shall be with PVC compound applied over the conductor by
extrusion and shall conform to the requirement of type “A” compound as per IS : 5831. The
thickness of insulation and the tolerance on thickness of insulation shall be as per Table 2 of
IS : 1554 part-1. Control cables having 6 cores and above shall be identified with
prominent and indelible Arabis numerals on the outer surface of the insulation. Colour
of the numbers shall contrast with the colour of insulation with a spacing of maximum
50 mm between two consecutive numbers. Colour coding for cable up to 4 cores shall
be as per applicable Indian standard.
1.6.4. The inner sheath shall be applied over the laid-up cores by extrusion and shall be PVC
compound conforming to the requirements of type ST1 PVC compound as per IS: 5831. The
minimum thickness of inner sheath shall be as per Table 4 of IS: 1554-Part-1.
1.6.5. The outer sheath for the cables shall be applied by extrusion and shall be of PVC compound
conforming to the requirements of type ST-1
Compound as per IS: 5831. The thickness of outer sheath shall be as per
applicable latest IS: 1554(part-1).
relevant table of
1.7. XLPE CABLES:
1.7.1. Power cables for 1.1KV shall be aluminum conductor, XLPE insulated screened, sheathed,
armoured and overall PVC sheathed as detailed below:
1.7.2. The conductors shall be stranded and compacted circular for 1.1 KV cables & should meet
the requirement.
1.7.3. 1.1KV cables shall be provided with both conductor screening and insulating screening. The
conductor shall be provided with non-metallic extruded semi conducting shielding. The
conductor screen shall be extruded in the same operation as insulation.
1.7.4. The core insulation shall be with cross linked polyethylene insulating compound applied by
extrusion & should be manufactured with Dry/Gas curing process. It shall be free from
voids and shall withstand all mechanical and thermal stresses under steady state and
transient operating condition. It shall conform to the properties given in Table-1 of IS:
7098(Part-2).
1.7.5. The insulation shielding shall be provided over the insulation & shall consist of non-metallic
extruded semi-conducting compound in combination with a non-magnetic metallic
screening of copper tape/wires. The copper screen of all cores combined shall be capable
of carrying the Single line to ground fault current for the duration specified in the data
Sheet, otherwise 300 Amps for screen of each core for duration of one Second. Vendor
shall furnish calculation in support of selection of the size of copper screen along with
bids.
1.7.6. The conductor screen, XLPE insulation and insulation screen shall be extruded in one
operation by “Triple Extrusion Dry. Cured” process to ensure perfect bonding between the
layers. The core identifications shall be colored strips or by printed numerals.
1.7.7. The inner sheath shall be applied over the laid up cores by extrusion and shall conform to
the requirements of type ST2 compound of IS: 5831. The extruded inner sheath shall be of
having uniform thickness.
1.7.8. For multi core cables, the armouring shall be by galvanized steel strips. The dimensions of
strips shall be as per latest edition of IS: 3975. If armouring is specified/required for single
core cables in that case, the same shall be with H4 grade hard drawn aluminum round
wire.
1.7.9. The outer sheath of the cables shall be of PVC compound conforming to the armouring and
shall be of PVC compound conforming to the requirements of Type ST2 compound of
IS:5831 with suitable additives shall be provided (To prevent attack by rodent & termite).
The thickness of outer sheath shall be as per amendment No. 1 to Table 5 of IS: 798- part2.
1.7.10. The dimensions of the insulation, inner sheath and armour materials shall be governed by
values given in latest IS: 7098(pt.2)1958.
1.8. CABLE ACCESSORIES:
1.8.1. The straight through jointing kits for use on the systems shall be suitable for the type of
cables offered as per this specification.
1.8.2. The accessories shall be supplied in kit form. Each component of the kit shall carry the
manufacturer’s mark of origin.
1.8.3. The kit shall include all stress grading insulating and sealing materials apart from conductor
fittings and consumable items. An installation instruction sheet shall also be included in
each kit.
1.8.4. The contents of the accessories kit including all consumables shall be suitable for storage
without deterioration at a temperature of 45 deg C, with shelf life extending to more than
5 years.
1.8.5. Makes of kit other than those specified in data sheet may be considered for acceptance if
type certificates along with CPRI approved drawings accompany the offer. The details of
type tests shall be as per cl. 4.2 of this specification.
1.8.6. Terminating kits: The straight through jointing kits shall be suitable for installation on ducts
and for underground burial with uncontrolled backfill and possibility of flooding by water
and chemical. These shall have protection against any mechanical damage and suitably
designed to be protected against rodent and termite attack. The jointing Kits shall be one
of the makes/ types mentioned in the data sheet.
2. TESTING AND INSPECTION:
The cables shall be tested and examined at the manufacturer’s works. All the materials
employed in the manufacture of the cable shall be subjected, both before and after
manufacture, to examination, testing and approval by UGVCL.
Manufacture shall furnish all necessary information concerning the supply to UGVCL.
Manufacture shall furnish all necessary information concerning the supply to GGVCL
inspectors. The inspectors shall have free access to the manufacturer’s work for the
purpose of inspecting the process of manufacture in all its stage and he will have the
power to reject any material which appears to him to be of unsuitable description or of
unsatisfactory quality.
2.1. PVC & XLPE CABLES:
2.1.1. After completion of manufacture of cables and prior to dispatch, the cables shall be
subjected to type, routine, acceptance and special tests as applicable. UGVCL reserves the
right to witness all tests with sufficient advance notice from vendor. The test reports for
all cables shall be got approved from the engineer before dispatch of the cables.
2.1.2 All routine tests, acceptance tests, type tests and additional type tests for improved fire
performance shall be carried out on cables as listed in IS: 1554 Part-1, and IS: 7098 Par-2.
2.1.3. The material of fillers & inner sheath shall be compatible with the temperature ratings of
the cable & shall have no detorious effect on any other component ratings of the cable.
The outer sheath of XLPE cables shall be subjected to all the tests applicable for PVC
cables. The test requirement for insulation and sheath of PVC cables shall be as per latest
revision of IS: 5831.
2.1.4. Following are the special tests to be performed on the cables if applicable and tests result
for similar type of cables shall accompany the offer.
a)
Accelerated water absorption test for insulation as per NEMA-WC-5. (For PVC Insulated
cables) and as per NEMA WC-7 (for XLPE insulated cables).
b)
Dielectric Retention Test: The dielectric strength of the cable insulation tested in
c)
If cables with FR PVC outer sheath: Oxygen index Test: The test shall be carried out as per
ASTEMD 2863 or applicable Indian standard specifications.
d)
Flammability Test: The test shall be carried out on finished cable as per IS-7098 (Pt.2)1985:
IEC-332(1).
Test for rodent and termite repulsion property: The vendors shall furnish the
Test details to analyze the property by chemical method.
2.2. CABLE ACCESSORIES:
Type tests should have been carried out to prove the general qualities and design of a given type
of termination / jointing system. The type tests shall include the following tests shall include the
following tests conforming to VDE 0278/IS specification. The type tests certificates shall be submitted
along with the offer for such makes of accessories not mentioned in the data sheet.
2.2.1. Rated withstand A.C. Voltage test
2.2.2. Partial discharge test
2.2.3. Rated withstand surge voltage test
2.2.4. Continuous A.C. Voltage test with cycle current load (Number of heating Cycles-3).
2.2.5. Partial discharge test
2.2.6. Continuous A.C. voltage test with cyclic current load (Number of heating Cycles-63).
2.2.7. Thermal short circuit test
2.2.8. Continuous A.C. Voltage test with cyclic current load (Number of heating Cycles-63).
2.2.9. Rated withstand surge voltage test
2.2.10. D.C Voltage test
2.2.1.1. Test under the influence of moisture
2.2.12. Dynamic short circuit test.
3. PACKING AND MAKING
Cables shall be dispatched in non-returnable wooden drums of suitable barrel diameter.
Securely battened, with the take-off end fully protected against mechanical damage. The wood
used for construction of the drum shall be properly seasoned, sound and free from defects. Wood
preservatives shall be applied to the entire drum. Ferrous parts used shall be treated with a
suitable rust preventive finish or coating to avoid rusting during transit or storage.
On the flange of the drum, necessary information such as project title, manufacturer’s name,
type, size, voltage grade of cable, length of cable in meters drum no, cable code, BIS certification
mark, gross weight etc. shall be printed. An arrow shall be printed on the drum with suitable
instructions to Show the direction of the drum.
4. ERECTION SPECIFICATION FOR CABLING
Scope
This is defining the requirements for supply, wherever applicable the installation, testing and
commissioning of the cabling system.
Standards:
The work shall be carried out in the best workmen like manner in conformity with this
specification, the relevant specification and codes of practice of Indian standards institution,
approved drawing and instruction of Engineer-in- charge or his authorized representative
issued from time to time. In case of any conflict between the standards, the instructions of
Engineer-in-charge shall be binding.
Power cable specification:
Power cables for use on 415 V systems shall be of 1.100 Volts grade, aluminum standard
conductor, PVC insulated, and PVC sheathed single wire armoured and overall PVC sheathed.
Power cables for 1.1kv systems shall be aluminum conductor, XLPE insulated, screened, PVC
bedded galvanized steel flat armoured and PVC sheathed cable. All L.T. cables conform to
Indian standard specification and relevant sections of IS: 1554 Part-I and II.T. Cables shall
conform to IS: 7038 (Part 2). Unarmoured Cables to be supplied shall be from any of the IS/ISI
approved makes such as Asian/CCI/Universal/ICI/ICC/Havells.
CABLE LAYING:
4.4.1 Cables as far as possible shall be laid in complete, uncut lengths from one termination to
the other.
4.4.2 Cables shall be neatly arranged in the trenches in such a manner so that criss-crossing is
avoided and final takes off to the switchgear is facilitated. Arrangement of cables within
the trenches shall be responsibility of the contractor. Cable routing between lined cable
trench and equipment shall be taken through appropriate support arrangement.
4.4.3 All temporary ends of cables must be protected against dust and moisture to prevent
damage to the insulation. For this purpose, ends of all PVC insulated cables shall be taped
with an approved PVC or rubber insulation tape. Use of friction type or other fabric type
tape is not permitted. Lead sheathed cables shall be plumbed with lead alloy.
4.4.4. Cables shall be handled carefully during installation to prevent mechanical injury to the
cables. Ends of cables leaving trenches shall be coiled and provided with a protective pipe
or cover, until such times the final termination to the equipments is completed.
4.4.5. Directly buried cables, if required shall be laid underground in excavated cable trenches
where specified. Trenches shall be of sufficient depth and width for accommodating of all
cables correctly spaced and arranged with a view of heat dissipation and economy of
design.
Minimum depth of buried cable trench shall be 750mm for low voltage cables, the depth
and the width of the trench shall vary depending upon the number of layers of cables as
per Indian standard.
4.4.6. As each row of cables is laid in place and before covering every cable shall be given an
insulation test in the presence of Engineer-in-charge / UGVCL. Any cable, which proves
defective, shall be replaced before the next groups of cables are laid.
All wall openings / pipe sleeves shall be effectively sealed after Installation of cables to
avoid seepage of water inside building / lines trench.
4.4.7 Where cables rise from trenches to D.P. / S.S., MSP etc. they shall be taken in G.I. pipes /
HDPE PVC pipe for mechanical protection up to a minimum permissible height.
Cables ends shall be carefully pulled through the conduit, to prevent damaged to the
cable. Where required, approved cable lubricant shall be used for this purpose. Where
cable enters conduit the cable should be bent in large radius. Radius shall not be less than
the recommended bending radius of the cables specified by the manufacture.
Following guide of the pipe fill shall be used for sizing the pipe Size:
1 cable in pipe - 53% full
2 cable in pipe - 31% full
3 or more cables - 43% full
4 Multiple cables - 40% full
After the cables are installed and all testing is complete, conduit Ends above grade shall be
plugged with a suitable weatherproof Plastic compound / “PUTTI” for sealing purpose.
Alternatively G.I. Lids or PVC bushes shall be deemed to have been included in the Cost for
the same shall be deemed to have been included in the Installation of G.I. pipe and no
separate payment shall be allowed.
4.4.8. Where cables pass through foundation walls or other underground structure, the
necessary ducts or opening will be provided in advance for the same. However, should it
become necessary to cut holes in existing foundations or structures. The electrical
contractor shall determine their location and obtain approval of the Engineer-in-charge
before cutting is done.
4.4.9. At road crossing / railway crossing and other places where cables enter pipe sleeves
adequate bed of sand shall be given so that the cables do not slack and damaged by pipe
ends.
4.4.10. Drum number of each cable from which it is taken shall be recorded against the cable
number in cable schedule. Cables shall be so routed that they will not be subjected to heat
from adjacent hot piping or vessels.
4.1.1.11. Cables installed above grade shall be run in trays, exposed on walls, ceilings or
structures and shall be parallel or at right angles to beams, walls or columns.
4.4.12. In case of individual cables or small groups which run along structure / walls etc. will be
clamped by means of 16 SWG GI saddles on 25*6 mm saddle bars. The cost of the saddle
and saddle bars shall be deemed to have been included in the installation of cables and no
separate payment shall be made on this account. Alternative small group of cables can be
taken through 100 mm slotted channel / ISMC 100 / angle support. They shall be rightly
supported on structural steel and massonary individual or in groups as required, if drilling
of Steel must be resorted to, approval must be secured and steel must be drilled where
the minimum weaking of the structure will result.
Cables shall be supported so as to prevent unsightly sagging.
4.4.13. If required, Cable laid on supporting angle in cable trenches, structures, columns and
vertical run of cable trays shall be suitably clamped by means of G.I. Saddle / clamps,
whereas cable in horizontal run of cable trays shall be tied by mean of nylon cords.
4.4.14 The identification marker shall be placed on each cable at every 2 Mtrs intervals
and at every cable joint locations, of adequate size fabricated from 3 mm thick, 25
mm wide aluminum strip. The marker shall be tied by nylon string with cable. The
marker shall be embossed by letter as stated below as applicable.
UGVCL- 1.1 KV – Name of feeder
4.5
Testing:
4.6.1 Before energizing, the insulation resistance of every circuit shall be measured from phase
to phase and from phase to ground.
4.6.2
4.6.3
4.6.4
Where splices or termination are required in circuit rates above 600volts, measure
insulation resistance of each length of cable before splicing and or / terminating. Repeat
measurements after splices and / or terminations are complete.
Measure the insulation resistance of directly buried cable circuits, before cable trenches
are back-filled. Repeat measurement after back-filling.
For cables up to 1.1 KV grade 1000KV Megger and for H.V. Cables 2.5KV Megger shall be
used.
D.C. High Voltage Test shall be conducted after installation on the following and test
results are recorded as UGVCL format.
a (All 1000 volts grade cables in which straight through joints have been made.
b (All cables above 1.100 V grade.
For record purposes test date shall include the measure values of leakage current verses
time.
The D.C. High Voltage test shall be performed as detailed below in the presence of the
Engineer-in-charge or his authorized representative only.
Cable shall be installed in final position with the entire straight through joints complete.
Termination shall be kept unfinished so that (if any) switchgears, transformers etc. are not
subjected to test voltage.
The test voltage shall be 18KV DC for 1.1KV grade cables.
Guaranteed Technical Particulars
1.
2.
3.
General
1.1.
Name of Manufacturer
1.2.
Place of Manufacturing
1.3.
Applicable standard IS/IEC
1.4.
Design ambient temperature
Cable parameters
2.1.
Voltage grade
2.2.
Permissible voltage & frequency variation for
satisfactory operation
2.3.
Nos of cores & size
Continuous current carrying capacity
3.1.
For standard condition as per IS
;
;
;
;
;
;
;
;
;
;
;
3.2.
4.
5.
3.1.1.
In air
3.1.2.
In ground
3.1.3.
In duct
3.1.4.
In trench
For site condition
3.2.1.
In air
3.2.2.
In ground
3.2.3.
In duct
3.2.4.
In trench
;
;
;
;
;
;
;
;
;
;
Conductor
;
4.1.
Material
4.2.
Applicable standard IS/IEC
4.3.
Shape of conductor
4.4.
Nominal cross section area (mm2)
4.5.
Number of wires per core
4.6.
Nominal diameter & cross section area of each wire
used in each core of the conductor
;
;
;
;
;
;
Insulation
;
5.1.
Material
5.2.
Applicable standard IS/IEC
5.3.
Thickness of insulation (mm)
5.3.1.
Between cores
5.3.2.
Between cores & inner sheath
5.4.
Tolerance in thickness (percent) of insulation
5.5.
Diameter of core over insulation (mm)
5.6.
Specific insulation resistance at ninety (90) degree
Centigrade (Ohm-Cm)
;
;
;
;
;
;
;
6.
7.
8.
9.
;
Filler
;
6.1.
Material
6.2.
Applicable standard IS/IEC
6.3.
Whether suitable for operating temperature of Cable
(Yes/ No)
6.4.
No of fillers provided including central filler
;
;
;
;
Inner sheath
;
7.1.
Material
7.2.
Applicable standard IS/IEC
7.3.
Extruded or wrapped
7.4.
Thickness (mm)
7.5.
Diameter of cable over inner sheath (mm)
;
;
;
;
;
Armouring
;
8.1.
Material
8.2.
Applicable standard IS/IEC
8.3.
Type of armouring
8.4.
Number of strips
8.5.
Diameter of cable over armouring
8.6.
Current carrying capacity of armour
8.6.1.
on continuous basis (Amp)
8.6.2.
short circuit current duration of 1 sec (KA)
Outer sheath
9.1.
Material
9.2.
Applicable standard IS/IEC
9.3.
Thickness of sheath
9.4.
Tolerance on thickness of sheath
;
;
;
;
;
;
;
;
;
;
;
;
9.5.
Overall diameter of cable (mm)
9.6.
Scheme for identification
10. Cable constants
10.1.
AC resistance per core at operating temperature
(Ohm / km)
10.2.
DC resistance per core at 20°C (Ohm / km)
10.3.
Reactance per core (Ohm / km)
10.4.
Capacitance per core (Microfarad / km)
10.5.
Insulation resistance at 27°C (Ohm/ km)
11. Other parameters
11.1.
Recommended minimum braiding radius (mm)
11.2.
Safe pulling force
11.3.
Cable weight (Kg / km)
12. Cable drum
12.1.
Net weight of cable (Kg)
12.2.
Drum weight (Kg)
12.3.
Shipping weight (Kg)
12.4.
Whether ISI Mark shall be indicated on drum
(Yes/No)
12.5.
Length of cable per drum (Meter)
12.6.
Whether details shall be embossed as stated in the
Technical Specification (Yes/No)
13. Whether type test reports submitted, as stated in the
Technical Specification (Yes/ No)
14. Whether documentation submitted as specified in the
Technical Specification. (Yes/ No)
15. Whether un-priced schedule of offered items submitted with
Technical offer. (Yes/ No)
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
3.0 Earthing
GENERAL:
All the non-current metal parts of electrical installation shall be earthed properly. All metal
conduits, trucking, cable sheaths, switchgear, distribution fuse boards, lighting fittings & fixtures
and all other parts made of metal shall be bonded together and connected by means of specified
earthing system. All earthing will be conformed to Indian Standard Specifications IS: 3043 – 1987.
The bidder shall measure the resistivity of various places in the proposed sub stations and design
suitable earthing system and get it approved from UGVCL.
EARTHING SPECIFICATIONS ( Pipe in Pipe Technology)
Supply, Installation, Testing & Commissioning of long life maintenance free electrolytic safe
earthing electrode consisting of Outer pipe dia 50 mm and Inner pipe dia 26 mm.
The earth electrode should be safe earthing electrode CPRI certified using Pipe in Pipe technology
with adequate galvanization of (80 – 200 micron), the length of the electrode is 3 mtrs. The
earthing should be as per IS – 3043, and the G.I. pipe used should be as per IS 1239.
The Earthing electrode should be supplied with 2 bags of Chemical Earth enhancing compound (25
kg each) to be used surrounding the earth electrode for back filling.
1) The Earthing electrode should be supplied with 2 bags of chemical earth enhancing compound (25
kg each) duly tested & Certified by any NABL accredited or BIS approved laboratory. The
chemical compound should be tested referring to protocol IS: 1350 & IEC 62321/111/54/CDV.
2) The PH value of the compound should be 7 to 8 the content of Mercury (as Hg) & Hexachromium
should be below detection level.
Length (L)
mm
Outer
Pipe Dia
(A) mm
Inner
Pipe Dia
(B) mm
Terminal
(H) mm
Outer
Pipe (T1)
SWG
Inner
Pipe (T2)
SWG
Pipe
Gav.
Micron
Minimum
3000
50
26
12
10
10
GI
80-200
4.0 HDPE PIPE
Technical specification of HDPE PIPES, IS : 4984 & IS : 14333
Test Results
Acceptance Norms
Reference
1
Raw Material & Test Results
1
Density Melt Flow
0.940 to 0.958 G/CC
IS : 4984 : 1995
2
Rate (MFI)
0.2 to 1.1 Mins.
IS : 14333:1996
2
Visual Appearance
a)
Surface Finish
Satisfactory
IS:4984:1995
The internal & external surface of the
pipes are smooth and free from
grooving & other defects
IS:14333:1996
As per relevant BIS standards
IS:4984:1995
a.
Dimension & Tolerances
b.
Outside Diameter
c.
Wall Thickness of pipe
d.
Ovality
e.
Length : Pipe/Coil
3
Performance Requirement
a.
Heat Reversion
IS:14333:1996
3 % (Max.) Longitudinal Reversion
IS:4984:1995
IS:14333:1996
b.
Hydrostatic Pressure
No failure or leakage during the
specified period
Resistance Test
Acceptance Test : Duration 48 Hrs at
80 Deg.C at specified stress value.
Type Test : Duration 165 Hrs at 80 deg.
C at specified stress value.
c.
Overall Migration Test
10 Mg/dm2
d.
Carbon Black Content
2.5 + 0.5%
e.
Carbon Black Dispersion
Satisfactory
f.
Density
940.0 to 958.0 KG/M3
g.
Melt Flow Rate
0.2 to 1.1 Gms/10 Mins
h.
Identification Marking & Color
i
Crush Resistance test
j
Impact Strength
Color : Black
IS:4984:1995
A pipe is marked in white color by hot
embossed or by indelible ink/paint by
screening as mentioned below at
every mater or on the either end of
pipes. Each Pipe has three equi-spaced
longitudinal stripes in Blue Color
IS:14333:1996
a) Manufacture’s Name
b) Designation of Pipe
c) Batch Number
Recovery shall be more than 95%
within 2.5 Minutes
There should be no crack/split when
9.1 Kgs (Tup B) load dropped from 1.5
Mtrs. Height after conditioning at 0
deg C for 1 hour
ASTM D 2412
ASTM D 2444
5.0 DOUBLE WALLED CORRUGATED
(DWC) HDPE DUCTS
Version 0.1
TABLE OF CONTENTS
Clause No.
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
Annexure – A
Annexure – B
Annexure – C
Annexure – D
Annexure – E
Annexure – F
Annexure – G
Annexure – H
TABLE 1
TABLE 2
TABLE 3
TABLE 4
Figure -1
Figure -2
Figure -3
Item
Foreword
Scope
Abbreviations
Terminology
General Requirements
Requirement of Raw material used for the DWC HDPE Duct
Requirement of DWC HDPE Duct
DWC DUCT Accessories
Packing Requirement
Type tests
Acceptance tests
Routine Test
Inspection
Sampling
Warranty
Rejection
Information to be supplied by Purchaser
Dimension of the DWC Duct
Compression Test
Impact Test
Bending Test
Oxidation Induction Test Procedure
Resistance to Flame Propagation Test Procedure
Anti Rodent Test Procedure
External Influences Test Procedure
Raw Material Requirement
Dimensions
Scale of Sampling
Time of Exposure of the Sample to the Flame
Impact Test Apparatus
Bending Test Apparatus
Resistance to Flame Propagation Test Apparatus
Page No.
6
7
7
7
7-8
8
8-10
10
10
11
11
12
12
13
13
13
13
14
14
15
15
16
17-18
18
19
20
20
21
21
22
23
24
0.0 FOREWORD
1.1
This specification is issued under the fixed serial number followed
by the year of adoption as standard or in case of revision, the year
of latest revision.
1.2
This specification requires reference to the following specifications.
(i)
IS:14930 Pt.-I : General requirements of Conduit system for
Electrical and Communication installation
(ii)
IS:14930 Pt.-II : Particular requirements of Conduit system for
Electrical and Communication installation
(iii)
IS:2530
: Method for test for Polyethylene moulding
materialsand polyethylene compounds.
(iv)
(v)
IS:7328
IS:12063
: HDPE materials for moulding and extrusion
: Classification of degrees of protection
provided byenclosures of electrical equipment
(vi) IS:11000(P
t-2/Sec1)Glow(vii)
Wire Test and Guidance, Test Methods for Fire
Hazard Testing
ASTM D 1693 : Test method for environmental stress –
cracking ofethylene plastics
(viii) ASTM D 638 : Standard test method for tensile properties of
plastic
(ix) ASTM D 790 : Test method for flexural properties of
Unreinforced and Reinforced Plastics and
Electrical Insulating
Materials.
(x)
(xi)
ASTM D 2240 : Standard Test method for Rubber property.
ASTM D 648 : Standard Test method for deflection
temperature of plastic under flexure load in the
Edgewise Position.
1.3 Whenever reference to any specification appears in this document, it shall
be taken as a reference to the latest version of that specification unless
the year of issue of the specification is specifically stated.
Effective from 01.06.2014
RDSO/SPN/204/2011
Version-0.1 (Draft)
1.0 SCOPE
This document specifies the requirement and testing for Double Walled
Corrugated (DWC) HDPE Ducts burried underground including ducts
& duct fittings for protection wherever required for all types of Signalling
Cables.
2.0 TERMINOLOGY
Terminology as defined in IS: 14930 shall be followed.
3.1 ABBREVIATIONS
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
ASTM : American Society for Testing & Materials.
CC : Cubic Centimeter.
DSC : Differential Scanning Calorimeter
DTA : Differential Thermal Analyzer
DWC : Double Walled Corrugated
ESCR : Environmental Stress Crack Resistance
FTIR : Fourier Transform Infrared Spectroscopy
g
: Gram
HDPE : High Density Polyethylene.
Hr
: Hour
IS
: Indian Standard.
Kg
: Kilograms
MFI : Melt Flow Index.
mm : Millimeter
OIT : Oxidation Induction Test
SPN : Specification Provisional Number.
UV : Ultra Violet.
4.0 GENERAL REQUIRMENTS
4.1 The DWC Duct shall consist of two layers, the outer layer will be
corrugated and the inner layer shall be plain and smooth.
4.2 DWC Duct and conduit fittings within the scope of this specification
shall be so designed and constructed that in normal use their
performance is reliable and without danger to the user or
surroundings.
4.3 When assembled in accordance with manufacturer’s instruction as
Effective from 01.06.2014
RDSO/SPN/204/2011
Version-0.1 (Draft)
part of a conduit system, they shall provide mechanical protection
to Signalling Cables contained therein.
Within the conduit system there shall be no sharp edge, burrs or
surface projections which are likely to damage insulated conductors
or cables or inflict impurity to the installer or user.
4.5 The protective properties of the joint between conduit and conduit
fittings shall be not less then that declared for the conduit system.
4.4
The DWC Duct and fittings shall withstand the stresses likely to
occur during transport, storage, recommended installation practice
and application.
4.7 The DWC duct shall be supplied in continuous length in coil form
or straight length, suitable for shipping and handling purpose.
4.8 For conduit systems that are assembled by means other than threads,
the manufacturer shall indicate whether the system can be
disassembled and if, so, how this can be achieved.
4.6
5.0 REQUIREMENTS OF RAW MATERIALS USED FOR THE DWC HDPE
DUCTS
5.1 The base HDPE resin used for the outer and inner layer of the DWC
HDPE Duct shall conform to any designation of IS:7328 or to any
equivalent standard meeting the requirements given in Table No. 1,
when tested as per the standards given therein. However, the
manufacturers shall furnish the designation for the HDPE resin as per
IS: 7328 as applicable.
5.2 The anti-oxidants used shall be physiologically harmless.
5.3 None of the additives shall be used separately or together in quantities
as to impair long term physical and chemical properties of the duct.
5.4 Single pass rework material of the same composition produced from
the manufacturer’s own production may be used and it shall not
exceed 10% in any case.
5.5 The raw material used for extrusion shall be dried to bring the
moisture content to less than 0.1%.
5.6 Suitable UV stabilizers shall be used only for manufacture of the
non black coloured HDPE duct to protect against UV degradation,
when stored in open for minimum 8 months period. The purchaser
may ask for UV content test. The test result for UV Content test by
FTIR method from any recognized laboratory shall be accepted and
the Hindered Amine Light Stabiliser shall be minimum 0.15 %. UV
Content test need not to be conducted in case of UV Stabilized raw
material is used.
Effective from 01.06.2014
6.1
RDSO/SPN/204/2011
Version-0.1 (Draft)
REQUIREMENT OF DWC HDPE DUCTS
6.2
Visual Requirement: The ducts shall be checked visually for ensuring
good workmanship that the ducts shall be free from holes, breaks and
other defects. The ends shall be cleanly cut and shall be square with axis
of the ducts.
6.3
Colour: The colour of the duct viz. Green, Orange, Blue, Yellow,
Brown, Violet, Grey and Red. The purchaser shall specify the colour
of the duct at the time of ordering.
6.4
Dimensions: The dimensions of the DWC HDPE Ducts shall be as
given in table- 2. Any other sizes other than those mentioned in Table2 shall be as per the agreement between the buyer and the seller.
Compliance shall be checked as per procedure given in Annexure- A
6.5
Standards Length: Duct up to 50 mm OD nominal size shall be
supplied in standard length of 100 mtr. ± 1% or 6 mtr ± 1 % and
all other sizes will be supplied in standard length of 6 mtr. ± 1%
6.6
Compression Strength: The conduit system shall have adequate
mechanical strength. Conduits when bent or compressed either
during, or after, installation according to manufacturer’s
instructions, shall not crack and shall not be deformed to such an
extent that introduction of the insulated conductors or cables becomes
difficult or that the installed insulated conductors, or cables are likely
to be damaged while being drawn in. Compliance may be checked
with the application of force which shall be at least 450 N, when
reaching the deflection of 5%. Test shall be conducted in accordance to
the method given in Annexure- B
6.7 Impact Strength: The conduit system shall have adequate mechanical strength.
Conduits when exposed to impact either during, or after, installation
according to
manufacturer’s instructions, shall not crack and shall not be deformed
to such an extent that introduction of the insulated conductors or
cables becomes difficult or that the installed insulated conductors, or
cables are likely to be damaged while being drawn in. Compliance
may be checked by ensuring there shall be no crack allowing the
ingress of light or water between the inside and outside after the test.
Test shall be conducted in accordance to the method given in AnnexureC
Effective from 01.06.2014
RDSO/SPN/204/2011
Version-0.1 (Draft)
6.8
Bending Strength: The conduit system shall have adequate mechanical
strength. Conduits when bend either during, or after, installation
according to manufacturer’s instructions, shall not crack and shall not
be deformed to such an extent that introduction of the insulated
conductors or cables becomes difficult or that the installed insulated
conductors, or cables are likely to be damaged while being drawn in.
During the test sample shall not flatten Compliance shall be
checked by passing a ball having a diameter equal to 95% minimum
inner diameter of the sample declared by the manufacturer, through
the sample whilst it is bent around the test apparatus. Test shall be
conducted in accordance to the method given in Annexure- D
6.9
Oxidation Induction Test (OIT): The OIT in a qualitative assessment of
the level (or degree) of stabilization of material. The induction time in
oxygen when tested with an Aluminum pan as per method given in
Annexure- E shall not be less than 30 minutes.
6.10 Resistance To Flame Propagation: Non flame propagating ducts shall
have adequate resistance to flame propagation. Samples of DWC
HDPE Ducts shall be checked by applying a 1KW flame. Test shall be
conducted in accordance to the method given in Annexure- F
Combustion shall stop within 30 Seconds.
6.11 Anti Rodent Properties: Safety of ducts from the direct attack of
subterranean organism anti rodent material is of utmost importance.
These ducts shall be evaluated for their safety against rodents before
laying them in the fields. Test shall be conducted in accordance to the
method given in Annexure- G
6.12
Resistance to External Influences on DWC HDPE Duct Accessories:
The accessories in Clause 7.0 shall be tested for external influences as
per IS-12063 for ingress of dust & ingress of water. DWC Duct
systems when assembled in accordance with the manufacturer’s
instructions shall have adequate resistance to external influences
according to the classification declared by the manufacturer with a
requirement of IP 67. Test shall be conducted in accordance to the
method given in Annexure- H
6.13
Marking Identification: The conduit shall be prominently marked at
regular intervals along their length of preferably 1m but not longer
than 3m using indelible ink with following.
• Manufacturers
Effective from 01.06.2014
•
•
•
•
•
•
RDSO/SPN/204/2011
Version-0.1 (Draft)
name
Specification
No.
Name of the duct with
size
Lot No. of the
Product
Date
of
manufacture
Product
Length
Purchaser’s
Name/
symbol
7.0
DWC DUCT
ACCESSORIES
7.1
The following accessories are required for jointing the ducts and
shall be supplied along with the ducts against specific orders. The
manufacturers shall provide complete procedure and method for
installation of the accessories. The required quantities of accessories
are to be mentioned by the purchasing authority in the purchase
order.
7.1.1 Plastic Coupler:
The coupler shall be of Push-fit type with O-ring. It is used for
jointing two or more ducts. The design of this shall be simple, easy to
install and shall provide air tight and water tight joint between the
two ducts. The coupler shall insure that the two ducts are butted
smoothly without any step formation in the inner surface. The
coupler may be straight, bands, T-joints type as per requirements of
purchaser.
7.1.2 End Cap:
This cap made of suitable plastic material shall be fitted on the
both ends of
duct, coil after manufacturing the duct. This shall avoid entry of
dust, mud and rainwater into the duct during the transit & storage.
7.2
The dimensions of accessories shall be suitable for joining the
ducts of dimension as per Cl: 6.3
Effective from 01.06.2014
RDSO/SPN/204/2011
Version-0.1 (Draft)
8.0
PACKING
REQUIREMENT
Stores shall be supplied in standard size for delivery and shall be so
packed as to permit convenient handling and to protect against loss
or damage during transit and storage.
9.0
9.1
TYPE TESTS
Complete DWC Duct systems for each offered size of the duct on
fresh samples shall be subjected to following tests minimum after 240
hrs of manufacture.
a)
b)
c)
d)
e)
f)
g)
h)
i)
j)
k)
Visual Requirement
Color
Dimension
Standards length
Compression Strength
Impact Strength
Bending Strength
Oxidation Induction Test
Resistance to Flame Propagation
Anti rodent
Resistance to External Influences on DWC HDPE Duct
accessories
(Cl. No. 6.1)
(Cl. No. 6.2)
(Cl. No. 6.3)
(Cl. No. 6.4)
(Cl. No. 6.5)
(Cl. No. 6.6)
(Cl. No. 6.7)
(Cl. No. 6.8)
(Cl. No. 6.9)
(Cl. No. 6.10)
(Cl. No. 6.11)
9.2 The Oxidation Induction Test, Resistance to Flame Propagating Test,
Anti Rodent Test on the DWC duct and Resistance to External
Influences on DWC HDPE Duct accessories given in Cl. No. 6.8, 6.9, 6.10
& 6.11 respectively may be conducted at the manufacturer’s laboratory
by inspecting authority or at any recognized laboratory.
9.3 The raw material tests of the DWC duct given in Cl. No. 5.0 Table-1 for
each grade of raw material shall be conducted. Test may be conducted
at the manufacturer’s laboratory by inspecting authority or at any
recognized laboratory.
9.4 Unless otherwise specified each tests shall be made on three new samples.
10.0
ACCEPTANCE TESTS
10.1 The following test shall be carried after 240 hrs of manufacture
on samples selected from the lot as per sampling plan given in Cl 13.0
Effective from 01.06.2014
a)
b)
c)
d)
e)
f)
g)
h)
RDSO/SPN/204/2011
Visual Requirement
Color
Dimension
Standards length
Compression test
Impact test
Bending test
Resistance to Flame Propagation
Version-0.1 (Draft)
(Cl. No. 6.1)
(Cl. No. 6.2)
(Cl. No. 6.3)
(Cl. No. 6.4)
(Cl. No. 6.5)
(Cl. No. 6.6)
(Cl. No. 6.7)
(Cl. No. 6.9)
10.2 The Resistance to Flame Propagating Test on DWC HDPE Duct given
in Cl. No. 6.9 may be conducted at the manufacturer’s laboratory by
inspecting authority or at any recognized laboratory.
10.3 Unless otherwise specified each tests shall be made on three new samples.
11.0
ROUTINE TESTS
11.1 The following tests be carried out by the manufacturer after
240 hrs of manufacture:a)
b)
c)
d)
e)
f)
g)
h)
Visual Requirement
Color
Dimension
Standards length
Compression test
Impact test
Bending test
Resistance to Flame Propagation
(Cl. No. 6.1)
(Cl. No. 6.2)
(Cl. No. 6.3)
(Cl. No. 6.4)
(Cl. No. 6.5)
(Cl. No. 6.6)
(Cl. No. 6.7)
(Cl. No. 6.9)
11.2 The Resistance to Flame Propagating Test on DWC HDPE Duct given
in Cl. No. 6.9 may be conducted at the manufacturer’s laboratory by
inspecting authority or at any recognized laboratory.
11.3 The Density and Melt Flow Index tests on raw material of the DWC
duct given in Cl. No. 5.0 Table-1 for each grade of raw material shall be
conducted.
12.0
INSPECTION
12.1
All the gauges/ test & measuring instruments shall be under
calibration control at the time of inspection and proof to this office shall
be produced.
12.2
Inspection and testing shall be carried out by the inspecting authority
nominated by the purchaser to ensure that all the requirements of
this specification are complied with for the acceptance of the
materials offered by the supplier for inspection.
Effective from 01.06.2014
RDSO/SPN/204/2011
Version-0.1 (Draft)
12.3
The purchaser or his nominee shall have free access to the works of
the manufacturer and to be present at all reasonable times and shall be
given facilities by the manufacturer to inspect the manufacturing of
the duct at any stage of manufacture. He shall have the right to
reject whole or part of any work or material that does not conform
to the terms of this specification or any equivalent specification or
requirement applicable and may order the same to be removed /
replaced or altered at the expense of the manufacturer. All
reasonable/complete facilities considered necessary by the inspecting
authorities for the inspection of the ducts shall be supplied by the
manufacturer free of cost.
12.4
The manufacturer shall supply the duct samples and samples of the
raw materials free of charge as required by the inspecting authority
and shall at his own cost prepare and furnish the necessary test
pieces and appliances for such testing as may be carried out at his
own premises in accordance with this specification. Failing the
existence of facilities at his own premises for the prescribed tests, the
manufacturer shall bear the cost of carrying out the tests in an
approved laboratory, workshop or test house.
13.0
SAMPLING
13.1 All the length of same nominal size, similar construction and class
manufactured from the same material under essentially similar
conditions of production shall be grouped together to constitute a lot.
13.2 For judging the conformity of a lot to the requirements of the
acceptance tests, sampling shall be done for each lot separately. For
this purpose, the number of lengths to be selected at random from the
lot shall be in accordance with Table 3.
13.3 Theses lengths will be selected at random from the lot for taking
samples. From each of these lengths, sample of duct shall be taken.
The length of the sample shall be sufficient so as to provide test pieces
of required lengths as laid down in various test clauses.
14.0
WARRANTY
The manufacturer shall warrant the material covered by this
specification to be free from defects in design, material and
workmanship under ordinary use and service, his obligation under
this warranty being limited to replace free of cost those parts which
shall be found defective.
Effective from 01.06.2014
15.0
RDSO/SPN/204/2011
Version-0.1 (Draft)
REJECTION
In case the duct tested and inspected in accordance with this
specification, fail to pass the tests or comply with the requirement
of the specification, the whole consignment shall be rejected subject
to the discretion of the purchaser or his nominee.
16.0
INFORMATION TO BE SUPPLIED BY THE PURCHASER
16.1
Normally the duct will be supplied as per the standard dimensions
and length as mentioned in this document. However purchaser may
specify his own dimensions/lengths/packing requirements etc. In such
cases necessary tolerance shall also be specified by the purchaser.
16.2
Adequate quantity & type of duct accessories shall be supplied along
with each lot. Purchasers may specify additional requirement.
16.3
Inspecting agency for acceptance of material.
16.4
Colour of the Duct.
****
Effective from 01.06.2014
RDSO/SPN/204/2011
Version-0.1 (Draft)
ANNEXURE - A
DIMENSION OF THE DWC DUCT
Compliance of the outside diameter shall be checked using a ring gauge
or vernier caliper or any suitable method.
1.2 Compliance of the minimum inside diameter shall be checked by
measurement
according to two perpendicular diameters on the same section and calculating
the average value.
1.1
1.3
1.4
Outside diameter specified are nominal dimensions.
Outside diameter maximum is nominal outside diameter + (0.018 x
nominal outside
diameter values) rounded off to + 0.1 mm.
1.5
Minimum inside diameter is nominal outside diameter divided by 1.33
ANNEXURE - B
COMPRESSION TEST
1.1
1.2
1.3
1.4
1.5
1.6
1.7
Conduits are subjected to a compression test as per IS: 14930 (Pt-II).
The tests for conduits shall not be started until 240 hrs after
manufacture.
Samples shall be 200 ± 5 mm long.
Before the test the outside and inside diameters of the samples shall be
measure as described in clause 6.3
The samples shall be compressed between two flat steel plates having
minimum dimensions (100x200x15mm), the length 200 mm being
along the length of the sample. The sample shall be compressed at a
rate of 15 ± 0.5 mm/min and the load recorded at the vertical deflection
equivalent to 5% of the average value of the original inside diameter
of the sample.
When reaching the deflection of 5%, the applied force shall be at least 450
N
After the test there shall be no crack allowing the ingress of light or
water between the inside and the outside.
The deflection is calculated with the inner diameter but the
measurement of the outside diameter may be sufficient. In case of doubt,
it will be necessary to measure the inner diameter.
Effective from 01.06.2014
RDSO/SPN/204/2011
Version-0.1 (Draft)
ANNEXURE - C
IMPACT TEST
Twelve samples of the duct each 200 ± 5 mm in length or fittings are
subjected to an impact test as per IS: 14930 (Pt-II) by means of the
apparatus shown Figure-1.
1.2 The test apparatus shall be placed on a firm flat surface.The samples
shall be conditioned in a cold chamber at a temperature of – 5 ±1°C
for 2 h. The samples shall be removed from the cold chamber and
placed on the veeblock holder of the impact tester as shown in Figure-1.
1.3 The striker shall fall once on each sample. The time between removal of
the sample from the cold chamber and completion of impact shall not
exceed 10 seconds. The impact height and mass shall be as follows.
1.1
Nominal Size of
Conduit
Up to 60 mm
61 to 90 mm
91 to 140 mm
Above 140 mm
Mass of Striker
(+1% /-0%) kg
5
5
5
5
Fall Height
(+0% /-1%) (mm)
300
400
570
800
Energy Joules
15
20
28
40
The test sample shall be made on the weakest part of the Duct fittings
except that it shall not be applied within 5 mm of any sample entry.
Samples of ducts are tested on the center of their length.
1.5 After the test, at least in nine of the samples, there shall be no crack
allowing the ingress of light or water between the inside and the outside.
1.4
ANNEXURE - D
BENDING TEST
1.0
This test shall be carried out on pliable conduits.
Effective from 01.06.2014
RDSO/SPN/204/2011
Version-0.1 (Draft)
The test is made on six samples having an appropriate length as per
IS: 14930 (Pt-II). Three samples shall be tested at room
temperature; the other three shall be tested at -5 ±1°C. For the
test at -5°C, the sample shall be conditioned in a cold chamber for
2 hours. The test apparatus as shown in Figure-2 shall allow to
bend the duct with a bending radius equal to the minimum
bending radius values specified by the manufacturer. One of the
ends of the samples shall be fixed on the test apparatus by
means of an appropriate device. The sample is then bent to
approximately 90 degree (right angle) and hold.
2.2 During the test, the sample shall not flatten. Compliance shall be
checked by
passing a ball having a diameter equal to 95% minimum inner
diameter of the sample declared by the manufacturer, through
2.1
the sample whilst it is bent around the test apparatus.
ANNEXURE - E
OXIDATION INDUCTION TEST PROCEDURE
1.0 A short length of completed duct (approximately 30 cm) shall be sealed at the
ends and placed in an oven at temperature of 68 ± 1 °C for 8 hours. The
sample shall then be allowed to cool at room temperature for at least 16 hrs.
The samples shall be clean and dry. The sample shall then be tested by means
of a Differential Scanning Calorimeter (DSC) or by Differential Thermal
Analyzer (DTA).
2.1
2.2
Instrument Test Procedure:
Cell Cleaning: The cell shall be held at approximately 400 °C for 10
minutes in Nitrogen. The cell shall be cleaned after standing over night
and between testing of different formulations.
Temperature Calibration: This has to be done according to the
instrument manual.
The temperature scale should be adjusted until the determined melting point of
pure Indium metal is 156.6 °C at a heat rate of 5°C per minute or any other
heat rate as indicated in the manual of the equipment is permitted.
2.3
Effective from 01.06.2014
2.4
RDSO/SPN/204/2011
Version-0.1 (Draft)
Aluminum Pan Preparation: Standard aluminum DSC pans as per
ASTM D 4565 are required to hold specimens during testing. A fresh
pan shall be used for each test.
Sample preparation: Take the sample weighing about 5 mg from the
duct conditioned as indicated above. Position the sample in the center of
the pan.
2.6 Nitrogen Purge: Place the sample pan and reference pan in instrument
cell. Flush for 5 minutes with cylinder of nitrogen (99.6% extra dry
grade) at 60 ± 10 cc per minute.
2.5
2.7
Oxidation Test: Rapidly increase the temperature of the sample (20
°C/min or greater) from 100 °C or lower initial temperature to 199 ±
1 °C. After thermal equilibrium is obtained (steady recorder signal)
switch to 80 ± 20 cc per minute oxygen flow and simultaneously start
time-base recording. The oxygen used for the test should be equivalent to
or better than 99.6% extra dry grade.
2.8
Induction Period: The oxygen induction point shall be recorded as time
zero, and the chart speed shall be sufficient to provide a clearly
discernible slope at the start of the exothermic reaction. The test in the
pure dry oxygen atmosphere shall continue until the exothermic peak
is produced. The intersection of the tangent of the exothermic sloped
line with the extended base line will be drawn. The time from time zero
to is intersection point is read from the base line and recorded as the
oxidative induction time.
ANNEXURE - F
RESISTANCE TO FLAME PROPAGATION TEST PROCEDURE
Samples of DWC HDPE Ducts shall be checked by applying a 1KW flame.
A sample of length 675 + 10 mm is mounted vertically in a
rectangular metal enclosure with one open face, as shown in Figure-3-2
in an area substantially free from draughts. The general arrangements is
shown in Figure-3
Mounting is by means of two metal clamps approximately 25mm wide spaced
550 + 10 mm apart and approximately equidistance from the ends of the
sample.
1.1
1.2
A steel rod of 16 + 0.1mm is passed through the sample. It is rigidly and
independently mounted and clamped at upper end to maintain the sample
in a straight and vertical position. The means of mounting is such as not to
obstruct drops from falling onto the tissue paper.
Effective from 01.06.2014
RDSO/SPN/204/2011
Version-0.1 (Draft)
A suitable piece of white pinewood board, approximately 10 mm thick,
covered with single layer of white tissue paper is positioned on the lower
surface of the enclosure.
The assembly of sample, rod and clamping apparatus is mounted vertically
in the center of the enclosure, the upper extremity of the lower clamp being
500 + 10 mm above the internal lower surface of the enclosure.
1.3 The burner is supported so that its axis is 45 + 2
0
to the vertical. The
flame is applied to the sample so that the distance from the top of the
burner tube to the sample measured along the axis of the flame is 100
+ 10 mm and the axis of the flame intersects with the surface of the
samples at a point 100 + 5 mm from the upper extremity of the lower
clamp, and so that the axis of the flame intersects with the axis of the
sample.
1.4 The test is carried out on three samples. The flame is applied to the
sample for the period specified in Table - 4 and is then removed.
During the application of the flame, it shall not be moved except to
remove it at the conclusion of the period of the test. After the conclusion
of the test and after any burning of the sample has ceased, the surface
of the sample is wiped clean by rubbing with a piece of cloth soaked
with water.
1.5 All three samples shall pass the test. If the sample is not ignited by the
flame, it shall be deemed to have passed the test.
If the sample burns, or is consumed without burning, the sample shall be
deemed to have passed the test if after burning has ceased, and after the
sample has been wiped in accordance with 1.3 there is no evidence of
burning of charring within 50 mm of the lower extremity of the upper
and also within 50 mm of the upper extremity of the lower clamp.
If the sample burns, it shall be deemed to have failed the test if combustion is
still in progress 30 seconds after removal of the flame.
If the tissue paper ignites, the sample shall be deemed to have failed the test.
For the parts of the same below the burner, the presence of molten material
on the internal
or external surfaces shall not entail failure if the sample itself is not
burned or charred.
2.0 Compliance of DWC HDPE Duct fittings is checked by using the glow wire
test IS:11000 (Part 2/Sec 1). The glow wire shall be applied once to each
sample in the most unfavourable position of its intended use, with the
surface tested in vertical position, at a temperature of 750oC. The sample is
deemed to have passed this test if there is no visible flame or sustained glowing
or if flames or glowing extinguishes within 30s of the removal of the glow wire.
Effective from 01.06.2014
RDSO/SPN/204/2011
Version-0.1 (Draft)
ANNEXURE - G
ANTI RODENT TEST PROCEDURE:
The test against rodent may be conducted as per following procedures:
The ducts are to be laid underground in fields and also near urban or
rural settlements. Therefore they should be exposed to 3-4 most
predominant rodent species inhabiting these locations. The test rodent
species may include the lesser bandicoot rat, Bandicota bengalensis, The
Indian gerbils, tatera indica, the soft furred field rats, Millardia meltada and
the house rats, Rattus rattus.
The test ducts should be exposed to these rodent species housed
individually in iron mesh cages under laboratory conditions. Only freshly
capture rodent are to be utilized for the study. The rodents are first
acclimatized in laboratory cages for 7-10 days and then the tests be initiated.
For each trial, 3-4 rodents of uniform body weight are to be used for the trial.
Two different types of testes may be undertaken for all the ducts.
Choice Tests: In this trial the ducts of 15-30 cm length (one sample each of
treated and untreated /control sample) are exposed to the test rodents along
with food, thus the rodent had a choice between the food and the test duct.
This test may be run for longer periods (30-45 days). Tap water should be
provided ad libitum to the rodents.
NO Choice Test: The rodents are exposed to the test ducts only and no food is
given to the rodents during the period of trial. The test ducts (one sample
each of treated and untreated /control sample) are to the exposed to the test
rodents. This trail may be run for 5-7 days depending upon the health status
of starved test rodents. Tap water should be provided ad libitum to the
rodents.
Observation on tooth marks, rodent behavior toward exposed ducts,
relative extent of damage in treated and untreated samples should be
computed for both types of ducts. Health status of test animals in choice
and no choice test must also be monitored for the record any ill effect of
exposure of treated / control ducts on these animals. Number of cases and
the extent of rodent bites / scratch marks in control and anti rodent treated
ducts may indicate the relative deterrent/repellent properties of the test ducts.
Effective from 01.06.2014
RDSO/SPN/204/2011
Version-0.1 (Draft)
ANNEXURE - H
EXTERNAL INFLUENCES TEST PROCEDURE
1.0 The accessories in Clause 7.0 shall be tested for external influences as per IS12063 for ingress of dust & ingress of water. DWC Pipes systems when
assembled in accordance with the manufacturer’s instructions shall have
adequate resistance to external influences according to the classification
declared by the manufacturer with a requirement of IP 67.
2.1
Degree of Protection – Ingress of Foreign Solid Objects.
2.2
An assembly is made of DWC Pipes fittings with a short length of
DWC Pipes assembled in each entry. Where necessary, the open ends
of the assembly are plugged or are not part of the test.
2.3
The assembly shall be tested in accordance with the appropriate test of IS
12063.
2.4
The assembly tested for numeral 6, shall be deemed to have passed the
test if there is no ingress of dust visible to normal or corrected vision
without magnification.
3.1
Degree of Protection – Ingress of Water.
3.2
An assembly is made of a DWC Pipe fittings with a short length of
DWC Pipes assembled in each conduit entry. Where necessary, the open
end of the DWC Pipe is plugged, or is not part of the test.
3.3
The assembly shall be tested in accordance with the appropriate test of IS
12063.
3.4
The assembly tested for numeral 7 shall be deemed to have passed the
test, if there is not sufficient ingress of water to form a drop visible to
normal or corrected vision without magnification.
Effective from 01.06.2014
RDSO/SPN/204/2011
Version-0.1 (Draft)
Table-1
RAW MATERIAL REQUIRMENT
(Cl. 5.0)
S. No. Parameter
Density
1.
Specified Limit
0.940 to 0.958 g/cc at 27ºC
Test Method
IS:2530 or IS:7328
IS:2530
ASTM D 638-IV
4.
Tensile Strength at
Yield
Elongation at Break
0.2 to 1.1 g/10 min
at 190ºC, 5 kg load
20 N/mm2 Minimum
600 % Minimum
ASTM D 638-IV
5.
Hardness Shore D
Between 60 and 65 units
ASTM D 2240
Environmental Stress
Crack Resistance
Flexural modulus at 1 %
strain
Heat Deflection
Temperature at 45 g/mm2
OIT (in Aluminum Pan)
No cracking after 96 hrs.
ASTM D 1693
690 N/mm2 minimum
ASTM D 790
650C minimum
ASTM D 648
30 minutes minimum
As per Annexure-E
2.
3.
6.
7.
8.
9.
Melt Flow Index
Table-2 DIMENSIONS (Cl. 6.3)
Nominal Size
(mm)
(1)
40
50
63
75
90
110
120
125
140
160
180
200
225
250
315
Outside Diameter
(mm)
(2)
40
50
63
75
90
110
120
125
140
160
180
200
225
250
315
Specification for Double W alled Corrugated HDPE Ducts
Outside Diameter
Tolerance (mm)
(3)
+ 0.8
+ 1.0
+ 1.2
+ 1.4
+ 1.7
+ 2.0
+ 2.2
+ 2.3
+ 2.6
+ 2.9
+ 3.3
+ 3.6
+ 4.1
+ 4.5
+ 5.7
Minimum Inside
Diameter (mm)
(4)
30
37
47
56
67
82
90
94
106
120
135
150
170
188
237
Page 20 of 24
Effective from 01.06.2014
RDSO/SPN/204/2011
Version-0.1 (Draft)
Table-3
SCALE OF SAMPLING
(Clause–13.0)
Lot Size
(1)
Up to 300
For dimensional requirements
Sample size
Permissible Number
of Defectives
(2)
(3)
13
0
Other
Acceptance tests
(4)
2
301 to 500
20
0
3
501 to 1000
32
1
4
1001 to 3000
50
2
5
3001 and above
80
3
7
Table-4
TIME OF EXPOSURE OF THE SAMPLE TO THE FLAME
(Clause–6.9)
Material
Thickness
Flame Application
(mm)
(Tolerances +1 sec.)
Over
Upto
(1)
(2)
(3)
-
0.5
15
0.5
1.0
20
1.0
1.5
25
1.5
2.0
35
2.0
2.5
45
2.5
3.0
55
3.0
3.5
65
3.5
4.0
75
4.0
4.5
85
4.5
5.0
130
5.0
5.5
200
5.5
6.0
300
6.0
6.5
500
Specification for Double W alled Corrugated HDPE Ducts
Page 21 of 24
Effective from 01.06.2014
RDSO/SPN/204/2011
Version-0.1 (Draft)
FIGURE - 1
IMPACT TEST APPARATUS
Specification for Double W alled Corrugated HDPE Ducts
Page 22 of 24
FIGURE - 2
BENDING TEST APPARATUS
Specification for Double W alled Corrugated HDPE Ducts
Page 23 of 24
RESISTANCE TO FLAME PROPAGATION TEST APPARATUS
Signature of Tenderer
Company’s Round Seal
Date:
Page 24 of 119
Place
6.0 3-PHASE SMC BOXES FOR 3 PHASE
WHOLE CURRENT METER
Signature of Tenderer
Company’s Round Seal
Date:
Page 25 of 119
Place
TECHNICAL SPECIFICATION FOR 3-PH SMC BOXES MADE FROM THERMOSETTING PLASTIC
FOR 3-PH ENERGY METETR.
1.0
SCOPE:
This specification covers the design, manufacturing and testing of anti-corrosive,
dust proof, rust proof, shock proof, self extinguishing property, resistant to heat,
vermin & water proof, Ultra Violet Stabilized and pilfer resistant 3-PH SMC BOXES
made from Thermosetting Plastic i.e. Glass Reinforced Polyester Sheet Moulding
Compound (SMC) Confirming to IS:13410 (1992) and attached technical
specification, drawing and IS 14772:2000.
2.0
2.1
CONSTRUCTION:
The minimum size of box from inside shall be 375 X 270 X 210 mm.
2.2
Meter Box shall be moulded in a single piece forming the body of the 3-PH SMC
BOXES with a cover fitted with base by minimum two nos. concealed Stainless steel
hinges. The lid/cover shall rest on the collar of the 3-PH SMC BOXES base in such a
way that any access from outside of the box is not possible. The hinges shall be
fitted with the 3-PH SMC BOXES body base and cover rigidly, thereby making the
Service Connection Box pilfer resistant. All corners of the 3-PH SMC BOXES should
be round & not pointed ones.
2.3
The door in closed position should be overlapped in such a manner that no direct
entry or access is possible. The SMC meter Box shall be closed by S.S. ‘U’ Clamp of
minimum 0.8 mm (+/- 0.1 mm). thickness for holding and locking of the door with
body base. The “U” Clamp shall have 4 mm diameter hole through which it is
possible to seal the box for sealing purpose.
2.4
The top surface of box shall have little tapering shape towards both sides of the 3-PH
SMC BOXES for easy flow of rainwater.
2.5
The box should have a window of size 140 X 120 mm. provided with glass as Shown
in the drawing. The door shall open at 90 degree.
2.6
Hardware used for fixing window glass, hinges and particle board shall be concealed
and non removable from out side.
Signature of Tenderer
Company’s Round Seal
Date:
Page 26 of 119
Place
2.7
Required arrangements per box should be as follows:
Sr No
Details
Box for
3 ph. Connection
3
01
Size of the box
375 X 270 X 210 mm.
02
Thickness
2 mm
03
Opening of the box
90°
04
No of holes on backside box wall 04 No
having 6mm dia for fixing of box.
05
Earth bolt of 6 mm dia x 20 mm 01 No
length with 2 nuts and 2 washers
06
Cable Entry Hole with good quality 25mm – 01 No
rubber grommets as shown in
drawing.
07
Cable Exit Holes with good quality 25 mm – 01 No
rubber grommets as shown in
drawing.
GUARANTEED TECHNICAL PARTICULARS:
Guaranteed Technical particulars are given in enclosed Annexure A and B. Bidder
shall submit the data in given Performa.
4
TYPE TEST CERTIFICATE:
The bidder shall submit type test report as per IS-14772-2000 & IS – 13410 : 1992
from CIPET, Ahmedabad/ERDA, Baroda along with the offer. Type Test Certificate
should not be older than 5 years as on the date of tender opening.
5
ROUTINE TEST :
Manufacturer has to carryout routine test during production to check the essential
requirements that are likely to vary during production. Manufacturer has to keep
records of the same and to be produced for verification of inspector when asked at
the time of inspection of lot.
Signature of Tenderer
Company’s Round Seal
Date:
Page 27 of 119
Place
6
ACCEPTANCE TEST
The acceptance tests shall be carried out on randomly selected samples as per
Annexure-B
7
TYPE TEST
From the offered lot, Sample shall be picked up at discretion of DGVCL for type test at
CIPET, Ahmedabad/ERDA., Baroda for every 30,000 nos. supply. The charges for the
Type Test shall be borne by bidder. On passing the type test successfully, the lot shall
be accepted. In case, the boxes are not confirmed to type test, another sample from
the lot shall be selected and tested again. On receipt of unsatisfactory results, the lot
shall be rejected and new lot shall be offered for inspection keeping aside old lot
offered and rejected earlier by the DGVCL. However Company reserves the right to
accept the boxes by levying penalty at the discretion of the DGVCL.
8
RAW MATERIALS
The manufacturer has to submit the test certificate for the material used in the lot
offered and document for purchase of raw material.
9
FACILITY
The bidder shall have facility to test the box for routine tests and acceptance as per
IS– 14772 : 2000 and IS - 13410 at their works. The bidder has to submit list of
Machinery & Equipment / Testing instruments etc.
10
INSPECTION AND TESTING
The bidder has to offer the boxes for inspection at his works before dispatch. The
manufacturer will offer all facilities to inspector without any charge.
11
DESPATCH
The 3-PH SMC BOXES shall be so dispatched as to ensure that no damage occurs
during transport where they may be subject to rough handling.
12
TENDER SAMPLE
A tender sample as per specifications will have to be submitted before opening of the
tender to Dy. Engineer, UGVCL, RSO, Mehsana.
13
Destination:
The above material shall be supplied to RSO or any store of UGVCL.
Signature of Tenderer
Company’s Round Seal
Date:
Page 28 of 119
Place
ANNEXURE – A
GUARANTEED TECHNICAL PARTICULARS FOR 3-PH SMC BOXES
SR.
PARTICULARS
DETAILED PARTICULARS
1
Maker's name
To be intimated by the supplier
2
Material
Glass reinforced polyester sheet
moulding compound
3
Grade of Material
SMC confirming to IS: 13410:1992
Grade S 1
4
Properties of Material of Construction of Service Connection Box
NO.
HeatDeflection
Temperature
TO BE OFFERED BY
BIDDER
150°C (Minimum)
(Ref.Std. IS:13411)
Exposure to flame
Self-extinguishing
(Ref. Std. IS:4249)
Melting Point
Does not melt
(Ref. Std. IS:13360)
5
6
Glow wire test at 650 C
As per IS 11000 Part-2/sec-1
Degree of protection
IP-42 as per IS-12063 / 87
Heat distortion temp.
125 C (Min) as per IS:13411
Dielectric Strength at 90 C
in oil
9 KV/mm (Min) as per IS : 6262-1971
Inside dimension of
Service Connection Box
To be mentioned by the supplier
a.Height
375 mm (min)
b.Width
270 mm (min)
c.Depth
210 mm (min)
Earthing Arrangement
Signature of Tenderer
Company’s Round Seal
Date:
Page 29 of 119
Place
Earthing bolt
One no. of Earthing bolt of MS with 2
nuts and 2 washers shall be provided
on RH side of box. Earthing sign has to
be provided near to earthing bolt.
Dia. & Length of earthing
bolts
Dia. 6 mm Length 20 mm
7
Locking arrangement
For Holding & Locking of door with
base two nos. of "U" shaped clamps to
be provided
8
Manufacturer short name
and UGVCL shall be
embossed. A/T no. and
month & year of
manufacture shall be
screen printed.
To be provided on the front side of the
box
9
Sealing arrangement
Holes for wire seal.
10
Wire entry
pluged holes
11
Colour of Meter Box
Off White
12
Window having Triplex
Glass
Window Size 140mm X 120 mm
Fitted from inside in such a way that it
can be replaced without opening door
(with metal frame all around)
Fixing of Glass
ANNEXURE - B
TEST REQUIREMENT FOR 3-PH SMC BOXES
Reference Standards
ROUTINE TEST
Protection against electric shock
IS 14772
Provision for earthing
- Do -
ACCEPTANCE TESTS (Random samples 10 nos. to be selected)
Marking ( Name, Trade mark)
Signature of Tenderer
Company’s Round Seal
Date:
Page 30 of 119
- Do -
Place
Protection against electric shock
- Do -
Provision for earthing
- Do -
Construction and Dimension verification
- Do -
Heat distortion temperature (min.1500C) (On any one sample)
IS 13411
Self Extinguishing (On any one sample)
IS: 4249
TYPE TEST
Marking
IS: 14772
Dimensions
- Do -
Protection against electric shock
- Do -
Provision for earthing
- Do -
Construction
- Do -
Resistance to ageing, to humid conditions, ingress of Solid objects and
to harmful ingress of water
- Do -
Mechanical strength
- Do -
Resistance to heat
- Do -
Resistance of insulating material to abnormal heat and fire
- Do -
Resistance to rusting
- Do -
Resistance of tracking
- Do -
Heat distortion temperature (min.1500C)
IS 13360
(Part VI Sec III)
Self Extinguishing
IS: 4249
Material Identification
Signature of Tenderer
CIPET
Company’s Round Seal
Date:
Page 31 of 119
Place
7.0 3-PHASE SMC BOX FOR THREE PHASE RING
TYPE CT OPERATED ENERGY METER
Signature of Tenderer
Company’s Round Seal
Date:
Page 32 of 119
Place
TECHNICAL SPECIFICATION FOR 3-PH SMC BOX MADE FROM THERMOSETTING PLASTIC
FOR THREE PHASE RING TYPE CT OPERATED ENERGY METER.
1
SCOPE:
This specification covers the design, manufacturing and testing of anti-corrosive,
dust proof, rust proof, shock proof, self extinguishing property, resistant to heat,
vermin & water proof, Ultra Violet Stabilized and pilfer resistant, SMC meter Box
made from Thermosetting Plastic i.e. Glass Reinforced Polyester Sheet Moulding
Compound (SMC) Confirming to IS:13410 (1992) and attached technical
specification, drawing and IS 14772:2000.
3.0
2.1
CONSTRUCTION:
The minimum size of box from inside shall be 570X 280 X 215 mm.
2.2
SMC meter Box shall be moulded in a single piece forming the body of the SMC
meter Box with a cover fitted with base by minimum three nos. concealed Stainless
steel hinges. The lid/cover shall rest on the collar of the SMC meter Box base in such
a way that any access from outside of the SMC meter Box is not possible. The hinges
shall be fitted with the Meter Box body base and cover rigidly, thereby making the
Service Connection Box pilfer resistant. All corners of the SMC meter Box should be
round & not pointed ones.
2.8
The door in closed position should be overlapped in such a manner that no direct
entry or access is possible. The SMC meter Box shall be closed by S.S. ‘U’ Clamp of
minimum 0.8 mm (+/- 0.1 mm). thickness for holding and locking of the door with
body base. The “U” Clamp shall have 4 mm diameter hole through which it is
possible to seal the box for sealing purpose.
2.9
The top surface of SMC meter Box shall have little tapering shape towards both
Sides of the SMC meter Box for easy flow of rainwater.
2.10
The box should have a window of size 140 X 120 mm. provided with glass as
Shown in the drawing. The door shall open at 90 degree.
2.6
Hardware used for fixing window glass, hinges and particle board shall be concealed
and non removable from outside.
2.7
Required arrangements per box should be as follows:
Signature of Tenderer
Company’s Round Seal
Date:
Page 33 of 119
Place
Sr No
Details
Box for
3 ph. connection
01
Size of the box inside
570X 280 X 215 mm.
02
Thickness
2 mm
03
Opening of the box
90°
04
No of holes on backside box wall having 6mm dia for fixing of box.
04 No
05
Earth bolt of 6 mm dia x 20 mm length with 2 nuts and 2 washers
01 No
06
Cable Entry Hole with good quality rubber grommets as shown in 50mm – 01 No
drawing.
07
Cable Exit Holes with good quality rubber grommets as shown in 50 mm – 01 No
drawing.
3
GUARANTEED TECHNICAL PARTICULARS:
Guaranteed Technical particulars are given in enclosed Annexure ‘A’ and ‘B’. Bidder
shall submit the data in given Performa.
4
TYPE TEST CERTIFICATE:
The bidder shall submit type test report as per IS-14772-2000 & IS – 13410: 1992
from CIPET, Ahmedabad / ERDA, Baroda along with the offer. Type Test Certificate
should not be older than 5 years as on the date of Tender opening.
5
ROUTINE TEST :
Manufacturer has to carryout routine test during production to check the essential
Requirements which are likely to vary during production. Manufacturer has to keep
Records of the same and to be produced for verification of inspector when asked at
the time of inspection of lot.
6
ACCEPTANCE TEST
The acceptance tests shall be carried out on randomly selected samples as per
Annexure-B
7
TYPE TEST
From the offered lot, Sample shall be picked up at discretion of Company for type Test
at CIPET, Ahmedabad/ERDA., Baroda for every 30,000 nos. supply. The charges for the
Type Test shall be borne by bidder. On passing the type test successfully, the lot shall
be accepted. In case, the boxes are not confirmed to Type test, another sample from
Signature of Tenderer
Company’s Round Seal
Date:
Page 34 of 119
Place
the lot shall be selected and tested again. On Receipt of unsatisfactory results, the lot
shall be rejected and new lot shall be Offered for inspection keeping aside old lot
offered and rejected earlier by the UGVCL. However Company reserves the right to
accept the boxes by levying penalty at the discretion of the Company.
8
RAW MATERIALS
The manufacturer has to submit the test certificate for the material used in the lot
Offered and document for purchase of raw material.
9
FACILITY
The bidder shall have facility to test the SMC meter Box for routine tests and
acceptance as Per IS– 14772: 2000 and IS - 13410 at their works. The bidder has to
submit List of Machinery & Equipment / Testing instruments etc.
10
INSPECTION AND TESTING
The bidder has to offer the boxes for inspection at his works before dispatch.
manufacturer will offer all facilities to inspector without any charge.
14
15
The
DESPATCH
The SMC meter Box shall be so dispatched as to ensure that no damage occurs
during transport where they may be subject to rough handling.
Destination:
The above material shall be supplied to RSO or any store of UGVCL.
Signature of Tenderer
Company’s Round Seal
Date:
Page 35 of 119
Place
ANNEXURE – A
GUARANTEED TECHNICAL PARTICULARS FOR THREE PHASE RING TYPE CT OPERATED ENERGY
METER SMC BOX
SR.
PARTICULARS
DETAILED PARTICULARS
1
Maker's name
To be intimated by the supplier
2
Material
Glass reinforced polyester sheet
moulding compound
3
Grade of Material
SMC confirming to IS: 13410:1992
Grade S 1
4
Properties of Material of Construction of 3ø SMC meter Box
NO
Flame Retardant test
TO BE OFFERED BY
BIDDER
As per IS : 11731 (Min. FVO)
Exposure to flame
Self-extinguishing
(Ref. Std. IS:4249)
5
Flexural Strength
155 Mpa (Min) as per Annex-F of
IS- 13411-1992
Glow wire test at 650 C
As per IS 12063 / 87
Degree of protection
IP-42 as per IS-12063 / 87
Heat distortion temp.
125 C (Min) as per IS:13411
Dielectric Strength at 90 C
in oil
9 KV/mm (Min) as per IS : 62621971
Tensile Strength
50 Mpa (Min) as per Annex-F of
IS- 8543(P-4/Sec-1)-1984
Izod Impact Strength
155 Mpa (Min) as per Annex-F of
IS- 13410-1992.
Inside dimension of Service
Connection Box
To be mentioned by the supplier
a. Height
570 mm (min)
b. Width
280 mm (min)
Signature of Tenderer
Company’s Round Seal
Date:
Page 36 of 119
Place
c. Depth
215 mm (min)
Earthing Arrangement
Earthing bolt
One no. of Earthing bolt of MS
with 2 nuts and 2 washers shall be
provided on RH side of box.
Earthing sign has to be provided
near to Earthing bolt.
Dia. & Length of Earthing
bolts
Dia. 6 mm Length 20 mm
7
Locking arrangement
For Holding & Locking of door
with base two nos. of "U" shaped
clamps to be provided
8
Manufacturer short name
and UGVCL shall be
embossed. A/T no. and
month & year of
manufacture shall be
screen printed.
To be provided on the front side
of the box
9
Sealing arrangement
Holes for wire seal.
10
Wire entry
plugged holes
11
Colour of Meter Box
Off White
12
Window having Triplex
Glass
Window Size 140mm X 120 mm
Fixing of Glass
Fitted from inside in such a way
that it can be replaced without
opening door (with metal frame
all around)
6
Signature of Tenderer
Company’s Round Seal
Date:
Page 37 of 119
Place
ANNEXURE - B
TEST REQUIREMENT FOR SMC 3 PH CT METER BOX
Reference Standards
ROUTINE TEST
Protection against electric shock
Provision for earthing
IS 14772
- Do -
ACCEPTANCE TESTS (Random samples 10 nos. to be selected)
Marking ( Name, Trade mark)
- Do -
Protection against electric shock
- Do -
Provision for earthing
- Do -
Construction and Dimension verification
- Do -
Heat distortion temperature (min.1500C) (On any one sample)
IS 13411
Self Extinguishing (On any one sample)
IS: 4249
TYPE TEST
Marking
IS: 14772
Dimensions
- Do -
Protection against electric shock
- Do -
Provision for earthing
- Do -
Construction
- Do -
Resistance to ageing, to humid conditions, ingress of Solid objects
and to harmful ingress of water
- Do -
Mechanical strength
- Do -
Resistance to heat
- Do -
Resistance of insulating material to abnormal heat and fire
- Do -
Resistance to rusting
- Do -
Signature of Tenderer
Company’s Round Seal
Date:
Page 38 of 119
Place
Resistance of tracking
- Do -
Heat distortion temperature (min.1500C)
IS 13360
(Part VI Sec III)
Self Extinguishing
IS: 4249
Material Identification
Signature of Tenderer
CIPET
Company’s Round Seal
Date:
Page 39 of 119
Place
8.0 1-PHASE SMC METER BOX FOR
SINGLE PHASE ENERGY METER
Signature of Tenderer
Company’s Round Seal
Date:
Page 40 of 119
Place
TECHNICAL SPECIFICATION FOR METER BOX MADE FROM THERMOSETTING
PLASTIC FOR SINGLE PHASE ENERGY METER.
1.0 SCOPE:
1.1 This specification covers the design, manufacturing and testing of anticorrosive, dust proof,
rust proof, shock proof, self extinguishing property, resistant to heat, vermin & water proof,
Ultra Violet Stabilized and pilfer resistant Meter Box made from Thermosetting Plastic i.e. Glass
Reinforced Polyester Sheet Moulding Compound (SMC) Confirming to IS:13410(1992) and
attached technical specification, drawing and IS 14772:2000.
2.0
CONSTRUCTION:
2.1 The minimum size of box from inside shall be 250 X 220 X 135 mm and thickness 1.5 mm so as
to house any make of energy meter for single phase mains.
2.2 Meter Box shall be moulded in a single piece forming the body of the meter box with a cover
fitted with base by minimum two nos. concealed stainless steel hinges. The lid/cover shall
rest on the collar of the Meter Box base in such a way that any access from outside of the
meter is not possible. The hinges shall be fitted with the Meter Box body base and cover
rigidly, thereby making the Meter Box pilfer resistant.
2.3 The door in closed position should be overlapped in such a manner that no direct entry or
Access is possible. The Meter Box shall be closed by SS ‘U’ Clamp of minimum 0.8 mm.(+ 0.1
mm) thickness for holding and locking of the door with body base. The “U” Clamp shall have
4mm. diameter hole through which it is possible to seal the box.
2.4 The box should have a window of size 110 X 120 mm. provided with internally fitted glass of 3
mm thickness as show in the drawing. The glass shall be fixed from inside without any
hardware exposed at front. The door shall open from right to left at 90 degree.
2.5 The top surface of box shall have little tapering shape towards both sides of the meter box for
easy flow of rainwater.
2.6 4 Nos. holes on backside box wall having 6mm diameter shall be provided for fixing of box on
the wall.
2.7 Cable entry and exit holes of 14 mm. diameters shall be provided on both sides of box with
Good quality rubber grommets as shown in the drawing.
2.8. One no Earth bolt of 6 mm diameter x 20 mm. length with 2 nos. nuts and 2 nos. washers &
aspiring washer shall be provided. The irremovable earthing symbol is to be provided near earth
bolt.
Signature of Tenderer
Company’s Round Seal
Date:
Page 41 of 119
Place
2.9 A fixed bolt should be provided for hanging of meter from top of the meter.10 mm thick
particleboard should be provided for bottom screws. Meter mounting arrangement should be
suitable for any make of meter
2.10 All corners of the meter box should be round and not pointed ones. Hardware used for fixing
window glass, hinges and particle board shall be concealed and non removable from outside.
2.11 All M.S. parts shall be zinc passivated.
3.0
GUARANTAEED TECHNICAL PARTICULARS:
Guaranteed Technical particulars are given in enclosed Annexure A and B. Bidder shall submit
the data in given Performa.
4.0
TYPE TEST CERTIFICATE:
The bidder shall submit type test report as per IS-14772-2000 & IS – 13410:1992 from CIPET,
Ahmedabad/ERDA, Baroda or NABL approved lab along with the offer. Type Test Certificate
should not be older than 5 years as on the date of tender opening.
4.1
ROUTINE TEST:
Manufacturer has to carryout routine test during production to check the essential
requirements that are likely to vary during production. Manufacture has to keep records of the same
and to be produced for verification of inspector when asked at the time of inspection of lot.
4.2
ACCEPTANCE TEST:
The acceptance tests shall be carried out on randomly selected samples as per Annexure – B.
4.3
TYPE TEST:
From the offered lot, Sample shall be picked up at discretion of UTTAR GUJARAT VIJ COMPANY
LIMITED for type test at CIPET,Ahmedabad/ERDA., Baroda or NABL approved lab for every
50,000 nos. supply. For lot size smaller than 50,000 nos.latest type test certificate for the same
item but not older than 2 years from the date of inspection shall be considered valid. The
charges for the Type Test shall be borne by bidder. On passing the type test successfully, the lot
shall be accepted. In case, the boxes are not confirmed to type test, another sample from the lot
shall be selected and tested again. On receipt of unsatisfactory results, the lot shall be rejected
and new lot shall be offered for inspection keeping aside old lot offered and rejected earlier by
the UTTAR GUJARAT VIJ COMPANY LIMITED. However UTTAR GUJARAT VIJ COMPANY LIMITED
reserves the right to accept the boxes by levying penalty as per description of the UTTAR
GUJARAT VIJ COMPANY LIMITED.
5.0
RAW MATERIALS :
Test certificate for the material used in the lot offered and document for purchase of raw material
should be maintained by manufacturer and produced to inspector as and when required.
Signature of Tenderer
Company’s Round Seal
Date:
Page 42 of 119
Place
6.0
FACILITY:
The bidder shall have facility to test the box for routine tests and acceptance as per IS – 14772
: 2000 and IS – 13410 at their works. The bidder has to submit list of Machinery &Equipment/
Testing instruments etc.
7.0
INSPECTION AND TESTING:
The bidder has to offer the boxes for inspection at his works before dispatch. The manufacturer
will offer all facilities to inspector without any charge.
8.0
DISPATACH:
The meter boxes shall be so dispatched as to ensure that no damage occurs during transport
where they may be subject to rough handling.
Signature of Tenderer
Company’s Round Seal
Date:
Page 43 of 119
Place
ANNEXURE – A
GUARANTAEED TECHNICAL PARTICULARS FOR SINGLE PHASE METER BOX
SR.N
O.
PARTICULARS
DETAILED PARTICULARS
1.
Maker’s name
To be intimated by the supplier
2.
Material
Glass reinforced polyester sheet
moulding compound
3.
Grade of Material
SMC confirming to IS:13410:1992
Grade S 1
TOBE OFFERED
BY BIDDER
Properties of Material of Construction of Meter Box
4.
Heat Deflection Temperature
(Ref.Std.IS:13411)
150°C(Minimum)
Exposure to flame
(Ref.Std.IS:4249)
Self-extinguishing
Melting Point (Ref.Std.IS:13360)
Does not melt
Glow wire test at 650C
As per IS 11000 Parat-2/sec-1
Degree of protection
IP-42 as per ;IS-12063/87
Heat distortion temp.
125C(Min)as per IS:13411
Dielectric Strength at 90 C in Oil
9KV/mm(Min)as per IS:6262-1971
Inside dimension of Meter Box
To be mentioned by the supplier
a. Height
250mm(min)
b. Width
220mm(min)
c. Depth
135mm(min)
d. Thickness of SMC Box
1.5 mm(min)
Window having Glass of 3mm
thickness
Window Size 110mm X 120mm
Fixing of Glass
Fitted from inside in such a way that
it cannot be replaced without
opening door(with plastic frame all
around)
5.
6.
Signature of Tenderer
Company’s Round Seal
Date:
Page 44 of 119
Place
Earthing Arrangement
Earthing bolt
One no. of zinc passivated Earthing
bolt of MS with 2 nuts and 2
washers and spring washer.
Irremovable earthing sign has to be
provided near to earthing bolt.
Dia. & Length of earthing bolts
Dia. 6mm Length 25mm
Door Locking.
For Holding of door with base one
no. of “U” shaped clamps to be
provided
7.
8.
9.
Manufacturer short name and
UGVCL shall be embossed. A/T
To be provided on the front side of
no. and month & year of
the box
manufacture shall be screen
printed.
10
Sealing arrangement
Holes for wire seal.
11.
Wire entry
Side entry 14 mm dia. hole
12.
Colour of Meter Box
Off White
Meter Mounting Arrangement
Universal type to suit mounting of
any make of meter broadly as per
the Drawing.
13.
Signature of Tenderer
Company’s Round Seal
Date:
Page 45 of 119
Place
Annexure B
TEST REQUIREMENT FOR METER BOX
Reference Standards
1) ROUTINE TEST
(a) Protection against electric shock
IS 14772
(b) Provision for earthing
-Do-
2) ACCEPTANCE TESTS (Random samples 10 nos. to be selected)
(a) Marking (Name, Trade mark)
-Do-
(b) Protection against electric shock
-Do-
(c) Provision for earthing
-Do-
(d) Construction and Dimension verification
-Do-
(e) Heat distortion temperature (min.150°C) (On any one sample)
IS:13411
(f) Self Extinguishing (On any one sample)
IS:4249
3) TYPE TEST
IS:14772
(a) Marking
(b) Dimensions
-Do-
(c) Protection against electric shock
-Do-
(d) Provision for eatrthing
-Do-
(e) Construction
-Do-
(f) Resistance to ageing, to humid conditions,
Ingress of Solid objects and to harmful ingress
Of water
-Do-
(g) Mechanical strength
-Do-
(h) Resistance to heat
-Do-
(i) Resistance of insulating material to abnormal heat and fire
-Do-
(j) Resistance to rusting
-Do-
(k) Resistance of tracking
-Do
(l) Heat distortion temperature (min.150°C)
IS 13360
(Part VI Sec III)
(m) Self Extinguishing (Spirit Burner)
IS: 4249
(n) Material Identification
CIPET
Signature of Tenderer
Company’s Round Seal
Date:
Page 46 of 119
Place
9.0 11 KV OUTDOOR LBS METERING
CUBICLE PANEL
Signature of Tenderer
Company’s Round Seal
Date:
Page 47 of 119
Place
SPECIAL INSTRUCTIONS TO BIDDER
Please read following instructions carefully before submitting your Bid.
1) All the drawings, i. e. elevation, side views, plan, cross sectional view etc., in
AutoCAD format and manuals in PDF format, for offered item shall be
submitted. Also the hard copies as per specification shall be submitted.
2) The bidder shall submit quality Assurance Plan for manufacturing process and
Field Quality plan with the Technical Bid.
3) The bidder shall have to submit all the required Type Test reports for the
offered item. However, in the event of partial submission or repots older than
specified limit, bidder must submit his confirmation for those Type Test
report/s to be submitted in the event of Order, without affecting delivery
schedule before commencement of supply free of cost. In absence of this
confirmation the evaluation shall be carried out accordingly as non submission
of Type Test reports.
4) The Bidder must fill up all the point of GTP for offered item/s. Instead of
indicating “refer Drawing or as per IS/IEC” the exact value/s must be filled in.
5) All the other points other than GTP, which are asked to confirm in technical
specifications must be submitted separately with the bid.
6) Please note that the evaluation will be carried out on the strength of
content of bid only. No further correspondence will be made.
7) The Bidder shall bring out all the technical deviation/s only at the specified
annexure.
8) The Bidder should indicate manufacturing capacity by submitting latest updated
Certificate of a Chartered Engineer (CE).
QUALIFYING REQUIREMENT DATA
Bidder has to satisfy all the following requirements.
1. The offered equipment have to be designed, manufactured and tested as per
relevant IS/IEC with latest amendments.
2. The minimum requirements of manufacturing capacity of offered type, size and
rating of equipment shall be 5 times tender/Bid quantity. The bidder should
indicate manufacturing capacity by submitting latest updated Certificate of a
Chartered Engineer (CE).
Signature of Tenderer
Company’s Round Seal
Date:
Page 48 of 119
Place
3. Equipment proposed shall be of similar or higher rating and in service of
minimum period of Three (3) years and satisfactory Performance certificate in
respect of this to be available and submitted.
4. The bidder should clearly indicate the quantity and Single Value Contract
executed during last Five (5) years, for the offered equipment. The details are
to be submitted in following format.
Sr. No.
Order
Items
Reference
Supplied
No. and
to
Date
Items
Quantity
Order
Fully
Executed
Yes/No
Status if
Order is
Under
Execution
Remark
5. Equipment offered shall have Type Test Certificates from accredited Laboratory
(accredited based on ISO/IEC Guide 25/17025 or EN 45001 by National
accreditation
body
of
country
where
laboratory
is
located)
as
per
IEC/IS/technical specifications valid period of Five (5) Years from date of
opening of Technical Bid.
TECHNICAL SPECIFICATION
FOR 11 KV OUTDOOR LBS METERING CUBICLE PANEL
1
SCOPE:
The 11KV LBS metering cubicle shall fully meet with the technical,
climatic, isoceraunic and system conditions given in this specification,
for indoor installation.
2
CLIMATIC & ISOCERAUNIC CONDITIONS:
2.1
The climatic conditions at site under which the equipment shall operate
satisfactorily are as follows:
(a)
Maximum ambient temperature
50
of the air in shade (0C)
(b)
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Minimum ambient temperature
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of the air in shade (0C)
(c)
Maximum daily average
40
ambient temperature (0C)
(d)
Minimum yearly average
30
ambient temperature (0C)
(e)
Maximum relative humidity (%)
95
(f)
Average number of thunder-storm
15
days per annum
2.2
(g)
Average annual rainfall (cm)
115
(h)
Maximum wind pressure (Kg/m2)
150
(i)
Earthquake acceleration (g)
(j)
Height above mean sea level (m)
0.08 x 2 g.
Not exceeding 1000
The equipment offered shall be suitable for continuous operation at the
full rated capacity under the above conditions.
2.3
Since the sub-stations are near the seashore or in an industrial area, the
equipment offered shall be suitable, for heavily polluted atmosphere.
3.
SYSTEM CONDITIONS:
11KV switchgear equipment and accessories shall comply with the
following system conditions:
(a)
Nominal system voltage (KV)
11
(b)
Highest system voltage (KV)
12
(c)
System earthing
(d)
Number of phases
(e)
Rated Frequency (Hz)
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effectively earthed
3
50
Place
(f)
Basic Insulation level
(i)
1.2 x 50 micro second impulse
75
with stand voltage (in KV peak)
(ii)
One minute power frequency
28
withstand voltage (KV rms)
4.
TECHNICAL REQUIREMENT
4.1
LOAD BRAK SWITCH
The LBS shall comply with the following minimum technical
requirements:
(a)
Type
(b)
Insulating Medium
(c)
Load Breaking capacity
630 Amp.
(d)
Rated normal current of LBS
630 Amp.
(e)
Bus-bar Rating (Amp)
630 Amp.
(f)
(i) Rated short time current (KA RMS)
21
(ii) Rated time (Sec.)
3
(g)
Indoor fix type
air
Method of closing
(i)
Normal
Manual
(ii)
Emergency
Manual
(h)
(i)
5.
Size of bus bar
As per requirement
GERNERAL REQUIRMENTS OF THE CUBICLE:
a) The LBS shall comply with the requirements of the latest edition of IEC: 60265100& 200 (1998) except where specified, otherwise in the specification. Padlocking
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arrangements and necessary mechanical interlocks. They shall be incorporated in
panel. ( it is IEC60227-100)
b) The LBS shall be capable of rapid and smooth interruption of load currents under
all conditions, completely suppressing all undesirable phenomena or during
capacitor switching operations. There shall be no re-striking, no abnormal voltage
and no high frequency current, generating consequent to switching of the capacitor
banks. The details of any devices incorporated to limit or control the rate of rise of
re-striking voltage across the LBS contacts shall be stated. The over voltage caused
by the switch while switching inductive or capacitive loads shall not exceed 2.5
times the highest phase to neutral voltage. The actual make and break times of the
switch throughout the ranges of their operating duties shall be stated in the tender
and guaranteed.
c) The LBS shall be robust in construction.
d) The symmetrical load breaking capacity of the switch shall be 10 MVA, which shall
remain constant within the limits of the two rated voltages specified in this
specification. For voltages lower than the rated voltage, the breaking current shall
remain constant.
e) The temperature rise and maximum temperature on any part of the panel, while in
service under continuous full load conditions shall not exceed the permissible limits
of temperature rise as specified in the IEC-694:1996 publication for alternating
current Load Break Switches with bolted type silver plated bus bars, jumpers &
riser ends. Gaskets shall be of a material which will not deteriorate under service
conditions. Metallic compression steps shall be provided for compressible gasket.
f) Main contacts shall have ample area and contacts pressure for carrying the rated
current and the short time short circuit current of the switch without excessive
temperature rise which may cause pitting or welding. Contacts shall be adjustable
to allow for wear and shall be easily replaceable and shall have a minimum of
moveable parts.
g)
The switch shall be suitable for rapid closing and opening. The Load Break Switch
opening and closing operations shall be done by manual mechanism. The
mechanism shall be designed to have a continuous sequence of Load Break Switch
opening and closing operations.
h) The auxiliary AC voltage for heater shall be taken from external source.
i) Working parts of the operating mechanism shall be of corrosion resisting material,
bearing which requires grease shall be equipped with pressure type grease fittings.
Bearings pins, bolts, nuts and other parts shall be adequately pinned or locked to
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prevent loosening or changing adjustment with repeated operation of Load Break
Switch.
j) Mechanical indicators to show the ‘close’ or ‘open’ position of the contacts shall be
provided.
k) All MS parts of Load Break Switch and ferrous parts such as hangers, supports, bolts
& nuts shall be hot dip galvanized as per IS:2629 (latest edition) with zinc platting
& olive green passivation. The material for spring shall be rust proof.
l) The Load Break Switch along with the operating mechanism shall be mounted
properly.
m) The manual operating device to be provided should be at a convenient height so
that it can easily be operated.
6.
LOAD BREAK SWITCH
(a) The Load Break Switch shall comprise of three independent poles, fitted with
a common operating mechanism.
The Load Break Switch along with its operating mechanism shall be mounted
inside a weather proof sheet steel cabinet suitable for outdoor conditions.
(b)
Each pole of Load Break Switch shall be mounted on a common chassis and
connected together for operation by common operating mechanism.
(c) INTEROGATTED INTERLOCKING SYSTEM:
The following interlocks between the Load Break Switch and cubicle shall be
provided.
i)
The LBS chamber door can only be opened when Load Break Switch
is in ‘OFF’ condition & vice versa.
ii)
The LBS chamber door can only be opened when Earth switch is in
Earth position & vice versa.
iii)
The earth switch cannot be open when LBS chamber is open.
iv)
The earth switch cannot be closed when LBS is in ON position and
vice versa.
v)
The instruction shall have to display on door of the cubicle in big red
letters. “The Load Break Switch should not be operated when LBS
chamber is in open position.”
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(e) The details and ratings of arc extinguisher shall be indicated in GTP and on
the Name plate of the cubicle panel.
6.
EARTHING :
A. EARTHING SWITCH:
i.
The LBS shall be equipped with an inbuilt integrated earth switch.
ii.
The earth switch with making capacity must be integrated in a
comprehensive interrogator interlocking system and must be
equipped with an ON snap action drive. Rated short time current:
20 KA for 3 sec.
iii.
Rated peak withstand current: 21
iv.
Proper inter locking of earth switch with LBS shall be provided.
Between (a) LBS ‘ON’ and Earthing (b) Between earthing switch and
Cubicle opening doors.
v.
Earth switch contacts must be closed with proper pressure to avoid
any loose contacts.
vi.
Each pole of Earth Switch shall be mounted on a common chassis and
connected together for operation by common operating mechanism.
vii.
One end of the earth switch shall be connected to bus bar and
second end shall be brought out of the cubicle for proper earthing
with 2 nos holes suitable for ½’’size galvanized bolts.
viii.
2”x ½” size 2 nos hot dip galvanized bolts and plain and spring
washers shall be provided for earthing connections.
B. CUBICLE EARTHING :
All metal parts of the cubicle which do not belong to main circuit and which
can collect electric charge causing dangerous effect shall be connected to
the earthing conductor made of copper having cross section area not less
than 75 sq. mm. Each end of conductor shall be terminated by
M10/equivalent quality and type of terminal for connection to earth system
installation. Earth conductor location shall not obstruct access to cable
terminations. Minimum two numbers of earth terminals shall be brought out
of the cubicle.
8.
NAME PLATE
The name plate / rating plate shall be provided and shall also indicate all
required details of Load Break Switch, panel, earth switch, support
insulator, arc extinguisher HRC fuse, and any other required details.
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9.
HRC FUSE:
a. HRC fuse base having same capacity of switch shall be provided in the
chamber of LBS in series of it on outgoing side.
b. All the devices shall be connected in series as under:
Incoming cable from UGVCL to LBS to HRC fuse to P1 of CTPT unit and P2
of CTPT unit to out going to consumer LBS cubicle/ over head structure
through a cable.
10.
CTPT COMBINE METERING UNIT
a.
Combine outdoor type CTPT metering unit shall be provided and installed by
UGVCL at site after installation of cubicle.
b.
Separate chamber at bottom of the cubicle shall be provided having
appropriate size to accommodate CTPT unit so as to have required
clearance from chamber body to CTPT live bare terminals.
c.
d.
The CTPT shall be mounted on outgoing side with terminal boots.
A draw out type trolley shall be provided in such a way that while installing
the CTPT unit, the trolley can be drawn out, CTPT shall be mounted on it,
CTPT bottom channel shall be locked with trolley to avoid movement of
CTPT.
e.
There shall be sealing arrangement of the CTPT chamber at the locking
handle, and a cover shall be provided on the handle so as to enclose the
handle with seal for its protection.
11. A.
ENERGY METERS COMPARTMENT: (KWH METER shall be provided and
installed by UGVCL)
a.
A separate Meter compartment shall be provided on upper side of the front
door of CTPT chamber.
b.
The internal dimensions of the compartment shall be
H: 650 mm,
c.
L: 355 mm,
D: 250 mm
Full size clear toughen glass shall be provided on the door of the meter
compartment so as to have complete visibility of meter with entire wiring
including TTB.
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d.
The slotted channels shall be provided in the compartment so as to install
meter, TTB and Modem.
e.
Sealing arrangement shall be provided to the meter compartment and a
metallic cover shell be provided on seal so as to protect the seal against
damage.
B.
TEST TERMINAL BLOCK (TTB):
3 Phase 4 Wire Test Terminal Block suitable for 3 Phase 4 Wire 50 Hz supply with
neutral point at maximum 440v and up to minimum 15 Amp. class of Power
supply and insulated for 1100v as per relevant Indian Standard manufactured
from high grade resin content bakelite material along with 2 mm thick MS Sheet
cover minimum 25 mm overhung on both entry and exit having minimum 3 mm
hole for sealing on diagonally placed 6 mm diameter bolts suitable for connecting
2.5 or 4 mm2
cu. Three current transformers and maximum 440 volt line
potential in 3 phase 4 wire system along with neutral terminals having back side
terminal connection type. The TTBs shall be of Gyro / IMP / DIP / RIKEN/Nelster
Welcon make test terminal block having the following quality.
a.
All terminators shall be heavy duty to sustain against fault current up to 20xlc
amps. And manufactured either from brass or from copper metals.
b.
Potential links shall be manufactured from minimum 16 gauge brass sheet and
fixing screws must be minimum 6 mm diameter to secure proper contact.
c.
Current shorting screws shall be minimum 8 mm diameter with proper
threading to ensure proper contact. Minimum clearance of 5 mm between
adjoining screw heads of each current guide terminator shall be maintained.
d.
All brass screws terminators (guides) and brass links shall be nickel plated to
ensure corrosion resistance.
e.
Superior quality of Bakelite powder in heavy duty electrical insulation grade
shall be used in molding the bakelite blocks.
11.
CUBICLE PANEL
a. The panel shall be as per attached drawing No. UGVCL/R&D/MC-001. The 11 KV
panel with accessories and fittings shall be outdoor, plinth mounting, cubicle type
switch boards for protection and controlling 11 KV side of CTPT unit at consumer
installation. The panel board shall be so constructed as to form independent 11KV
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outdoor panel. The panel shall be completely dust and vermin proof. The panels
shall
remain
vermin
proof,
even
when
the
CTPT
is
taken
out
for
maintenance/replacement. Overall dimensions of the panel shall be furnished
along with drawing. The exterior as well as interior of panel shall be painted with
two coats of stove enamel paint, with zinc phosphate treatment, after application
of single coat of anti-rusting paint. The exterior shall be painted with light gray
paint shade 631 of IS: The interior shall be painted with glossy white paint shade.
The manufacturer shall have in-house painting facility. The panels shall be
provided with MS sheet on all sides. The panel shall be provided with not less than
2 mm thick MS sheet for all sides. Suitable barriers for the bus-bars Load Break
Switches shall be provided, Lifting arrangement shall be provided for the panel.
Load Break Switch, Bus bar, cable/CTPT chamber shall be individual. The door of
LBS chamber shall have
Wire mesh provided behind it, so that the person opening the door shall not have
access to live parts of the panel.
b. The drawing and Dimensions of cubicle is for reference only, the manufacturer may
design to meet the requirements of tender.
12.
Depth
: 1300 mm to 1600 mm
Height
: 1700 mm to 2100 mm
Width
: 1200 mm to 1500 mm
BUS– BARS
A set of 3-phase bus-bars of 630 A current rating, having size of
preferably 65 x 10mm = 650 mm2, suitably insulated by heat shrinkable
tubes shall be provided. The bus-bars shall be made of electrolytic high
grade copper and shall be rectangular bars of sufficient current rating. PVC
sleeves/tap of suitable thickness shall be provided on bus-bars and jumpers
except at the joints. The joints shall be separately taped with paraplast
compound sleeves or PVC tapping. Suitable shutters shall be provided in
addition and separate from interlocks, with padlocking arrangements, so
that bus-bars become inaccessible, when the Load Break Switch is open for
maintenance. Inter phase barriers shall be of FRP/UL994 material.
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13.
CONTROL CABLE:
a. 1.1 KV, 10Core, 2.5 sq mm PVC insulated armored EC grade solid core
copper control cable shall be used for metering.
b. The control cable shall be provided with ferrules at both ends, for
current circuit-RM,RL and YM,YL and BM,ML same at both the ends.
Same way for PT circuit-RP, YP, BP same at both the ends. From CTPT
to TB and TTB to meter.
c. Entire cable have to be visible when the door is open.
d. The control cable shall be tied using PVC durable tie with cubicle inside
so as to avoid its movement.
e. Cable shall be fixed with glands at both the ends.
14.
TESTS & TEST REPORTS
i The outdoor switchgear panels shall be of proven design for outdoor installation
and should have been type tested as per relevant IS/IEC for the following type
tests, carried out in Government approved laboratory, within last five years
prior to date of bid opening.
a. Dielectric test
b. Temperature Rise test
c. Measurement of resistance of main circuit.
d. Short time withstand current and peak withstand current test
e. Mechanical endurance test
f. BIL test on support insulators
g. Degree of Protection (IP54)
h. Humidity Test
ii.
Type test reports for above tests shall be submitted with the offer. In case of
non-submission of some of the type test reports with the offer, the bidder shall
have to confirm for submission of the same before commencement of supply
without affecting delivery schedule.
iii.
Routine tests/acceptance tests as per the latest edition of IS: for Load Break
Switch shall be carried out on each panels (in presence of purchaser’s
representative if desires by the purchaser). A paper Test to be carried out for
panel with Gaskets provided for vermin proofing.
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iiii.
The test reports for type tests and routine tests in respect of associated
equipments as per the latest edition of the relevant IS shall be supplied by the
bidder.
ivi.
All tests reports for acceptance / routine rests shall be submitted and got
approved from the purchaser before dispatching the Cubicle.
15.
EARTH QUAKE AND WIND DESIGN LOADS:
Equipment shall be designed to withstand repeated earth quake accelerations of
0.08 x 2g. and wind loads of 150 kg/m2 on the project area (non simultaneous)
without damage to component parts and without impairment of operation.
16.
AUXILIARY POWER SUPPLY:
Power supply for auxiliary will be available from consumer end at 240 V, single
phase and 415 V, three phase, AC 50 Hz. The frequency can vary between 97% and
103% and voltage would vary from 110% to 85% of the normal value for heaters
and lighting lamps. Provision of Plug sockets for connection of external auxiliary
LT supply shall be made in the cubicle.
17.
GUARANTEED TECHNICAL PERTICULARS:
Details shall be furnished in the appended schedule-A (guaranteed particulars). In
the absence of these details, offer shall be treated as incomplete and is liable to
be ignored.
18.
OPERATION AND MAINTENANCE MANUAL:
All the required Operation and Maintenance manuals incorporating Field quality
plans (2 Sets) shall be supplied with each cubicle.
19. GUARANTEE:
The equipment/supply will be guaranteed to perform trouble free service for 24
months or 30 months from the date of supply from the date of commissioning or
from the date of supply respectively whichever is less. Any deficiency is
performance within the guarantee period will be made up free of cost by the
supplier either by replacement of by repairs.
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20.
DEVIATION: The materials should be offered strictly confirming to ISS / BIS /
Tender specifications given in the tender. If the tenderer’s desires to quote with
any technical deviations they should specifically quote the deviation & the ISS or
BIS Nos. in the body of the tender itself under the respective Annexure of this
tender document. If technical deviations furnished by the Tenderer are not
agreeable to UGVCL, the offers may be ignored. However it will be solely at UGVCL
discretion to consider the technical deviations OR not for considering the
Tenderer. No correspondences of the Tenderer after opening of the bid will be
entertained in this matter.
21. CABLE CONNECTION COMPARTMENT:
The cable connection compartment must be successfully tested according to DIN
VDE 0670 part 6 or equivalent IEC for behavior in the event of an internal defect. No
insulation material metal surface of the cable box is allowed to ensure arc proof
resistance in the cable connection compartment.
The cable connection compartment cover must be integrated in the comprehensive
integrator interlocking system.
The surge arrestor shall be provided in the incoming cable compartment.
The compartment must be dimensioned in such a way that two parallel cables can be
accommodated.
The cable compartment door must be detachable/removable type so as to facilitate easy
connection of the cable and n or to allow any hindrance to the maintenance staff while
doing maintenance. No cable cover should be hinged type.
22. OPERATION AND CONTROL:
There must be user friendly panel with a single line diagram and integrated position
indicator for all switching devices at the front side of the panel.
The following performance must be possible while front panel is closed.
a. Switching
b. Mechanical position indicator
c. Mechanical operation
d. Auxiliary voltage indicator.(External source voltage)
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23.
MOUNTING :
Two numbers of based channels along the length having minimum size of 100x50mm shall
have to be welded with two numbers of holes suitable for 5/8” dia foundation bolts in
each channel at a centre to centre distance 2500 along the length and mm to fix the
same with grouted foundation bolts on plinth.
24.
NAME PLATE:
Each RMU and its associated equipments shall be provided with a nameplate legible
and indelibly marked with at least the following information.
a. Name of manufacturer
b. Type, design and serial number
c. Rated voltage and current
d. Rated frequency
e. Rated symmetrical breaking capacity
f. Rated making capacity
g. Rated short time current and its duration
h. Purchase Order number and date
i. Month and Year of supply
j. Last date of completion of Guarantee period
k. Rated lightening impulse withstand voltage
l. Feeder name (Incoming and Outgoing), DTs Structure name, 11000 Volts
Dangers etc.
m. Name of DISCOM
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SCHEDLE – A
SCHEDULE OF GUARANTEED TECHNICAL PERTICULARS
(To be filled in and signed by the tenderer)
.
.
[I] LOAD BREAK SWITHCH(LBS):
a. Maker’s name and country of manufacturer
b. Manufacturer’s type designation
c. Applicable technical standards
d. Rated voltage (KV)
e. Service voltage (KV)
f. Type of LBS
g. Ambient temperatures used for design
i Maximum (0C)
ii Maximum daily average (0C)
h. Continuous current
i Under site condition (Amp)
ii Rated (Amp)
i. (9) a. Rated short time current (KA rms)
i Rated time (Sec)
j. Maximum rise of temperature over ambient for
current rating under clause 9 above (0C)
k. Rated operating duty cycle
l. Interrupting capacity based on duty cycle in clause
11 above
i Symmetrical at rated voltage in KA and MVA
ii Asymmetrical at rated voltage (KA)
iii Symmetrical at service voltage (KA)
m. Rated restriking voltage
i Amplitude factor
ii Rate of rise of natural frequency
iii Type devices, if any used to limit the rate of
rise of restricting voltage
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n. Rated continuous voltage for rated MVA (KV)
o. Making capacity (KA peak)
i At higher rated voltage
ii At lower rated voltage
p. Type of devices, if any used to obtain uniform
voltage distribution between breaks
q. Recovery voltage distribution between breaks in
percentage of rated voltage
i Switching OFF capacitor banks
ii Switching OFF on an unloaded transformer
r. Details of main contacts
i Material
ii Whether contacts are silver plated
iii Thickness of silver coating
iv Contact pressure (kg/mm2)
s. Insulation level of the LBS
i One minute dry withstand voltage (KV rms)
ii One minute wet withstand voltage (KV rms)
iii Impulse withstand test voltage (KV peak)
t. Minimum clearance in air
i Between phase (live parts) (mm)
ii Between live part and earth (mm)
u. Centre distance between phases (mm) for arc
extinguisher
v. Standard to which the LBS confirms
w. Details of extinguisher indicate (make/Type/Rating)
x. Weight of LBS (kg)
y. Method of closing
a. Normal:
b. Emergency:
z. Nos. of operations,
the LBS is capable of
performing at 100% breaking capacity
aa. Overall dimensions of panel.
a. Breadth (mm)
b. Width (mm)
c. Length (mm)
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bb. Heater
i Make
ii Type
iii Rating in KW
iv Rated Voltage
cc. INDICATING LAMP suitable for 240 V
a. Make
b. Type
c. Operating voltage
d. Lamp wattages
e. Colour of shade
30.
SWITCHBOARD WIRING :
a. Insulation of wire
b. Size of wire (mm2)
c. Grade of wire (Volt)
d. Whether conductor is of
i Copper
ii Stranded
e. Whether wire ends
provided with lug type
arrangements
f. Make and voltage grade of terminal blocks used
Note:
Instead of giving reference of drawing nos./IS/literatures etc. actual values/figures
must be furnished, where ever required, otherwise the said details in G.T.P. of the
Technical Bid, will be evaluated accordingly.
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