Kashmir Power Distribution Corporation Ltd.

Office of the Chief Engineer Planning & Procurement,

PDD Complex, Bemina, Srinagar.
Tel: 0194-2493280, 0194-2493281, Email: ceppkpdcl@gmail.com

TECHNICAL SPECIFICATIONS

FOR

11kV, XLPE, AERIAL BUNCHED CABLES

Prepared by Checked by Checked by Checked by Approved by

Er. Aamina Kirmani (AEE Er. Manzoor Ahmad Dar Er. Muzaffar Mukhtar Shah, Er. Bashir Ahmad Dar, Techno Economic
Procurement) (Executive Engineer) Superintending Engineer, Chief Engineer, Committee vide
Er. Shazia Basharat (AE) Purchase Officer, Procurement Circle. Planning & No.
Er. Bhavna Koul (JE) Procurement Division. Procurement, KPDCL, MD/KPDCL/TS-
Srinagar. 1/1920-26
Dated:12/08/2022

Specification No.
Date of Issue: 12/08/2022 Rev 0
CE/P&P/SPEC/2022/ABCable/11kV/007

AB Cable (11kV) page 1 of 12

 This is a Tender Specification for
procurement of “CROSS LINKED
POLYETHYLENE INSULATED AND PVC
SHEATHED AERIAL BUNCHED CABLES WITH
NEUTRAL CUM MESSENGER CONDUCTOR
(11kV)”, subject to the modification by the
Purchaser as per actual field requirement.
Supplier to submit the Guaranteed Technical
Particulars (GTP) and Drawings, after the
award of the Contract, for approval of the
Purchaser.

AB Cable (11kV) page 2 of 12

 SECTION A
TECHNICAL SPECIFICATIONS FOR CROSS LINKED POLYETHYLENE INSULATED AND PVC
SHEATHED 11kV AERIAL BUNCHED CABLES
1. SCOPE:
1.1 This specification covers design, manufacture, testing at manufacturer’s works
before dispatch, transportation, supply and delivery of 11 kV grade XLPE
insulated, screened all Aluminium conductor and PVC sheathed Power Cables, HT
Aerial Bunched Cables for overhead lines.
1.2 It is not the intent to specify completely herein all details of the design and
construction of the equipment. However, the equipment shall conform in all
respects to high standards of engineering, design and workmanship and shall be
capable of performing in continuous commercial operation up to the bidder’s
guarantee in a manner acceptable to the purchaser, will interpret the meanings
of drawings and specifications and shall have the discretion to reject any work or
material which, in his judgment, is not in accordance there with.
The Cables shall be suitable for Climatic conditions as listed in Section -B.

2. COMPOSITION OF THE CABLE:

The composite cable shall compose of three single-core cables twisted around a
bare aluminium alloy messenger wire, which will carry the weight of the cable.

3. RATED VOLTAGE:

The rated voltage of the cables shall be 11kV and the maximum operating
voltage shall be 12kV.

4. APPLICABLE STANDARDS:

Unless otherwise stipulated in this specification, the following standard with up to

date amendment shall be applicable.
S.NO Indian Standards Title International
standards
1 IS-8130/1984 Specification for conductors for insulated -
cables
2 IS-398 (PART-IV) Specification for aluminium alloy -
conductor
3 IS -7098 (PART- Specification for cross linked -
II)/1979 Polyethylene insulated PVC Sheathed
cables

AB Cable (11kV) page 3 of 12

 5. DETAILS OF SINGLE CORE CABLE

5.1 The cable conductors shall be H 4 grade class 2 Aluminium Conductors complying
with the requirements as specified in IS-8130-1984 with latest amendments.
The cable conductors shall be of round, stranded and compacted aluminium
of nominal cross sectional area 35mm2,50mm2,70mm2,,95 mm2,120 mm2 ,150
mm2 and 185 mm2.Conductor shall be clean & reasonably uniform in size and
shape and its surface shall be free from sharp edges. Corresponding number of
wires in the conductor shall be as given in the table below:
Nominal Maximum D.C Minimum no. Nominal Max short circuit
cross resistance at 20 of strands thickness of current for 1 sec
sectional degree Celsius insulation (KA)
area of Al. (mm)
conductor
35 0.868 6 3.6 3.4
50 0.641 6 3.6 4.72
70 0.443 12 3.6 6.7
95 0.32 15 3.6 8.96
120 0.253 15 3.6 11.32
150 0.206 15 3.6 14.16
185 0.164 30 3.6 17.39

5.2 Conductor Screen

The conductors screen shall be of extruded semi-conducting cross linked
polyethylene compound of thickness not less than 0.5 mm.

5.3 Insulation
The insulation shall be of extruded cross linked polyethylene (XLPE) ,Dry gas
cured/wet cured process of nominal insulation thickness 3.6 mm conforming to
the physical, electrical and ageing properties of IS: 7098 (Part-II)-2011.
The XLPE conductor shall be suitable for use where the combination of ambient
temperature and temperature rise due to load, including temperature on
exposure to direct sunlight results in conductor temperature not exceeding the
following:

Normal continuous operation Short circuit operation

90°C 250°C

AB Cable (11kV) page 4 of 12

 5.4 Insulation screen
The insulation screening shall consist of two parts; namely metallic & non metallic. Non
metallic part shall consist of a layer of extruded semi-conducting compound and shall
be applied directly over the insulation of each core. Thickness of non-metallic part
should be 0.6 mm.
The metallic part shall be non magnetic and shall be applied over the non-metallic part
of insulation screening of individual core. Metallic screening material shall be annealed
Copper tape. Thickness of Copper tape should be minimum 0.06 mm.
5.5 Outer –Sheath :-
Over the metallic screen the Cable shall be provided with extruded PVC outer sheath.
The composition of the PVC compound for outer sheath shall be Type ST2 of IS-5831-
1984 with latest amendments. The colour of the outer sheath shall be black. The
nominal & minimum thickness of the sheath shall not be less than the standard values
specified in the table No. 7 of IS-7098(Part-II)/2011. Outer surface of the Cable shall be
ultra-violet Ray resistant.
6. MESSENGER (NEUTRAL CONDUCTOR)

6.1 The bare messenger wire shall consist of aluminium alloy wires, generally
conforming to IS:398 (Part IV)– 1979.Messasnger conductor shall be stranded,
compacted ,circular and shall have smooth round surface to avoid damage to
the outer insulating sheath of single-core phase cables twisted around the
messenger.

6.2 There shall be no joints in any wire of the stranded messenger conductor
except thosemade in the base rod or wire before finally drawing.

6.3 The technical characteristics of messenger wire shall be as follows:

Messenger Conductor (Stranded Al Alloy IS 398 Part-4)

Nominal Cross sectional

Nominal Area of No. of Strand of Maximum DC
Areaof Phase Conductor
Aluminium Alloy in Aluminium Alloy resistance at20oC
(sq. mm)
Messenger Wire (sq. (ohm/km)
mm)
35 70 7 0.493

50 70 7 0.493

70 70 7 0.493

AB Cable (11kV) page 5 of 12

 95 70 7 0.493

120 95 19 0.351

150 120 19 0.283

185 150 19 0.229

6. TESTS

The cables offered should have been fully type tested as per the relevant standards
at any NABL accredited laboratory of National repute. The bidder shall furnish the
type test reports along with the bid, which shall not be more than ten years prior to
the date of publication of tender.

The following tests shall be carried out on the single-core cables as per IS-7098 (Part-II).

7.1 Type Tests

a) Tests on conductor:
i) Tensile test
ii) Wrapping test
iii) Resistance test

b) Tests for thickness of insulation and sheath

c) Physical tests for insulation:

i) Tensile strength and elongation at break
ii) Agency in air oven
iii) Degree of cross linking
iv) Hot set test
v) Shrinkage test
vi) Water absorption test ( gravimetric)

d) Physical tests for outer sheath:

i) Tensile strength and elongation at break
ii) Ageing in air oven
iii) Shrinkage test
iv) Hot deformation
v) Loss of mass in air oven
vi) Heat shock.
vii) Thermal stability
viii) Carbon black content of polythene sheath
e) Partial discharge test

AB Cable (11kV) page 6 of 12

 f) Test on extruded semi-conducting screens
i) Test for strippability of semiconducting strippable insulation screen(when
applicable)
ii) Volume resistivity
g) Thermal ageing test for complete cable
h) Bending test
i) Dielectric Power factor test:
i) As a function of voltage
ii) As a function of temperature
j) Insulation resistance (volume resistivity ) test
k) Heat cycle test
l) High voltage test
m) Flammability test for PVC Sheathed cables

7.2 Acceptance Test

a. Tensile Test
b. Wrapping Test
c. Conductor resistance test
d. Test for thickness of insulation and sheath
e. Hot set test for insulation
f. Tensile strength and elongation at break test for insulation and sheath
g. Partial discharge test (for screened cables only)
h. High voltage test
i. Insulation resistance (volume resistivity) test
j. Tests for cross linking for extruded semi conducting screen

7.3 Routine Tests

a. Conductor resistance test
b. Partial Discharge Test
c. High voltage test

7.4 The following tests shall be carried out on the bare messenger wire in
accordance with IS: 398 (Part-IV).

Type Tests/Acceptance Test

a) Breaking Load Test (on finished wire)
b) Elongation Test
c) Resistance Test

AB Cable (11kV) page 7 of 12

 7.5 CHALLENGE CLAUSE:
Purchase reserves the right to have the material, received after the inspection by
the authorized inspecting officer, again tested for any parameter(s) from
approved/NABL Accredited testing house/in house technique of the Purchaser. The
results if found deviating/unacceptable or in non-compliance with the approved
GTP’s, the lot shall be rejected and bidder shall arrange to replace the rejected LOT
within thirty (30) days of such detection at his cost including to and fro
transportation.

8. GUARANTEED TECHNICAL PARTICULARS:

The manufacturer shall furnish the guaranteed technical particulars of the cable
offered in the GTP format provided in section C.

9. CABLE IDENTIFICATION

The Cable shall be identified throughout its length by the following information by
means of a printed tape as per IS-7098(part-II) Identification shall be given on any
one of the insulated conductor of cables.
i. Manufacturer’s name or trade mark.
ii. Voltage grade.
iii. Year of manufacture
iv. Name of Purchaser

The Cables shall also be marked with the Standard Mark (BIS/ISI Mark). The
requisite BIS license corresponding to IS -7098(part-II) shall also be furnished along
with the bid without which the bid shall be treated as non-responsive.

The identification shall repeat after every 1000 mm along the length of the cable.

10. PACKING

The cables, as per specified delivery lengths, shall be securely wound /packed in
non- returnable wooden drums, capable of withstanding rough handling during
transport by Rail, Road, etc. The packing should withstand storage conditions in
open yards. The cable drums shall conform to IS-10418:1982. The dimensional
drawings of wooden drums shall be furnished after Purchase order both as hard
copy and soft copy (PDF format and AutoCAD format). The drum shall be provided
with circumferential lagging of strong wooden planks. The end of the cable shall be
sealed with good quality heat shrink sealing caps. The sufficiently required
additional sealing caps shall be supplied for use of testing during laying and jointing

AB Cable (11kV) page 8 of 12

 at site and to seal spare lengths of cable. The packing should be able to withstand
the rigorous of transport. Wood preservative shall be applied to the entire drum.
Each drum shall have the following information in bold letters in English stenciled
on it.
a. Ref: IS-7098(part-II)
b. Name & Address of the manufacturer, Trade name/Trade mark/Brand
c. ISI Marking
d. Type of Cable & Voltage Grade
e. Nominal Cross Section area of phase conductor
f. Length of Cable on drum (Meters)
g. Number of lengths on the drum (if more than one)
h. Direction of rotation of drum (by means of an arrow)
i. Gross weight (in Kg)
j. Country of Manufacture
k. Year of Manufacture
l. Owners purchase order reference.

11. CABLE LENGTHS:

The cables shall be supplied in continuous lengths of 500 m with +5% tolerance.
Where the ordered quantity is not multiple of 500 m and the incremental quantity is
very small, the same may be included in one of the drums. Otherwise, an additional
length for the incremental quantity will be supplied.

12. INSPECTION AND QUALITY CONTROL:

The Manufacturer shall furnish a complete and detailed quality plan for the
manufacturing process of the cable. All raw materials shall conform to relevant
applicable standards and tested for compliance to quality and requirement. During
the manufacturing process, at all stages, inspections shall be made to check the
physical and dimensional parameters, for verification to compliance to the
standards. The Manufacturer shall arrange, for inspection by the purchaser, during
manufacture with one month advance notice for verifying the various stage
inspections as specified in the quality assurance plan enclosed to verify the quality
control process of the Manufacturer.

AB Cable (11kV) page 9 of 12

 SECTION -B
CLIMATIC AND ISOCERAUNIC CONDITIONS (CIC)

1. The climatic and isoceraunic conditions at the site of work are approximately given
as under:

S.No. Description Values

i. Max. temp of air in shade 30.60C
ii. Min. temp of air in shade -200C
iii. Max. temp of air in sun 450C
iv. Height above sea level (Approx.) 1600 m
v. Max. relative humidity 90%
vi. Min. relative humidity 15%
vii. Average no. of thunder storm days per year 54
viii. Average rainfall 80 cm
ix. Wind Zone WZ – 3
x. Average number of rainy days per year 106
xi. Seismic Zone SZ – 5
xii. Area of installation HSZ
HSZ = Heavy Snow Zone, LSZ = Light Snow Zone

2. Communication and Transport

The nearest railway station is Jammu/Udhampur on the broad gauge line and is connected to the
Divisional Stores by a metal road. The equipment is required to pass en-route through various
Tunnels on NH-44. The weights and maximum dimension of the packages suitable for transportation
through tunnel route are as follows:

i. Length 7.0m
ii. Width 3.0m
iii. Height 4.55m
iv. Weight 40 Ton (Metric)

The supplier shall get the permissible weight and dimensions confirmed from the Highway
Authorities before proceeding with the manufacture of the equipment. It will be the responsibility of
the supplier to ensure timely and proper delivery of the equipment on door delivery at Srinagar,
through road transport. The supplier shall also ensure that the weights and dimensions of the
packages which are suitable to be carried by road transport up to Srinagar.

AB Cable (11kV) page 10 of 12

 SECTION –C
Guaranteed Technical Particulars for 11 kV, Aerial Bunched Cable
(To be filled in by the tenderer/bidder)
Tenderer
S.No Description
Response
Manufacturer’s Name
Class of Power Cable
1 Name of the Manufacturer and country of origin
2 Country of Manufacture
3 Type of cable/ cable code
4 Applicable standard
Voltage
5 a) Rated Nominal voltage
b) Rated Maximum voltage
Suitability for:
6
Earthed system
Phase Conductor
a) Nominal cross section(sq.mm)
b) Material
7 c) Shape
d) Diameter of conductor(mm)
e) Number of wires per conductor(Nos.)
f) Nominal diameter of wire in conductor(mm)
g) Weight of Phase Conductor per kilometer(Kg/km)
Messenger Conductor
a) Nominal cross section(sq.mm)
b) Material
8 c) Shape
d) Diameter of conductor(mm)
e) Number of wires per conductor(Nos.)
f) Nominal diameter of wire in conductor(mm)
g) Weight of Messenger Conductor per kilometer(Kg/km)
Insulation XLPE
a) Curing process
b) Material/Composition
9 c) Minimum average XLPE Insulation thickness for AB Cable
i) 35 mm2 (mm)
ii) 50 mm2 (mm)
iii) 70 mm2 (mm)

AB Cable (11kV) page 11 of 12

 iv) 95 mm2 (mm)
v) 120 mm2 (mm)
vi) 150 mm2 (mm)
vii)185 mm2 (mm)
10 Conductor screening
a) Material
b) Minimum thickness
c) Method of application
11 Insulation screen
A Non metallic part
a) Material
b) Minimum thickness
c) Method of application
B Metallic part
a) Material
b) Minimum thickness
12 Outer sheath
a) Material
b) Minimum thickness
c) Method of application
d) Colour
13 Volume resistivity of insulation
a) At 27 degree Celsius (ohm-cm)

b) At 90 degree Celsius(ohm-cm)

14 Tensile strength of insulation and sheath (N/mm2)

15 Elongation at break of insulation and sheath (%)
16 Completed cable
a) Approx overall dia
b) Approx weight (Kg/KM)
17 Cable drums
a) Drum size and material
(as per IS -10418/1982)
b) Standard drum length and tolerance of each drum
c) Dimensions of drum

AB Cable (11kV) page 12 of 12