1. spcification_cable (2)

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Tender No. : Ref. No. : LSGS-12-PC0258

User / Customer : Power Grid Company of Bangladesh Ltd. Page No. : 1 of 5

Project Title

: Design, Supply, Erection, Testing and Commissioning of 132kV Double Circuit Underground

Transmission Line Replacing Existing Tongi-Mirpur 132kV Transmission Line (T#47 to T#52) at

Rajuk Uttara 3rdPhase Project on Turnkey Basis

Contractor : LS Cable & System Ltd.

Document Title

SpecificationFor

132kV XLPE Power Cable

0 Jun. 22, 2012 Original issue J. Y. Cho J. S. Kim K. R. Ko

Rev. No. Date Descriptions Prepared By Reviewed By Approved By


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Ref. No. : LSGS-12-PC0258Rev. No. : 0Page No. : 2 of 5

1. Scope

This specification covers the construction, dimension, packing and test requirements of 132kV single core

copper conductor, cross-linked polyethylene(XLPE) insulated, corrugated & seamless aluminum sheathed

and MDPE outer sheathed.

2. Reference Standards

IEC 60228 : Conductors of insulated cables

IEC 60840 : Power cables with extruded insulation and their accessories for rated voltages above

30 kV (Um = 36 kV) up to 150 kV (Um = 170 kV) Test methods and requirements

3. Constructi on and Material

Construction of the cable shall meet the requirements specified in the attached table and as follows.

3.1 Conductor

The conductor shall consist of the circular compacted construction stranded from the plain annealed copper

wire in accordance with IEC 60228(class 2).

The conductor shall be water sealed by additional water swellable tape(s) between the conductor strands.

3.2 Conductor screen

Over the conductor, semi-conducting thermosetting compound shall be extruded as a conductor screen.

Semi-conducting swellable tape(s) shall be applied between the conductor and the conductor screen.

3.3 Insulation

The insulation shall be an extruded cross-linked polyethylene(XLPE) over the conductor screen.

The minimum thickness at any point shall not be less than 90% of nominal value specified in the attached

table.

3.4 Insulation screen

Over the insulation, semi-conducting thermosetting compound shall be extruded as insulation screen and

shall be firmly bonded to the insulation.

The conductor screen, insulation and insulation screen shall be extruded simultaneously by dry curing

process.


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5. Sealing and drumming

Immediately after the works tests, both ends of the cable length shall be sealed by means of metal capand pulling eye fitted over the end and plumbed to the metallic sheath.

The completed cable shall be wound on the non-returnable steel drum.

All cable drums shall be arranged to take a round spindle and lagged with closely fitting steel sheets.

6. Tests

The following tests shall be carried out at manufacturers works according to the procedure of IEC 60840.

6.1 Routine tests

1) A.C Voltage test

2) Partial discharge test

3) Electrical test on non-metallic sheath

6.2 Sample tests

1) Conductor examination and check of dimensions

2) Measurement of electrical D.C. resistance of conductor

3) Hot set test for XLPE

4) Measurement of capacitance


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Attached Table

Characteristics & Cross- sectional drawing

Scale : Not to scale

No Description Unit Particulars

0 Rated voltage kV 132

1 Conductor Plain annealed copper wires

- nominal cross- sectional area 800

- shape Circular compacted

- diameter(Approx.) 34.0

- Conductor binder Semi-conducting water swellable tape(s)

2 Conductor screen Semi-conducting thermosetting compound- thickness (nom.) 1.3

3 Insulation Cross-linked polyethylene(XLPE)

- thickness (nom.) 17

4 Insulation screen Semi-conducting thermosetting compound

- thickness (nom.) 1.2

5 Longitudinal water barrier - Semi-conducting water swellable tape(s)

6 Metal sheath corrugated & seamless aluminum sheath


7 Ant i-corrosion layer Bitumen compound

8 Oversheath Black PVC with graphite coating


11 Overall d iameter(approx.) 107

12 Weight(approx.) kg/m 15.0

13 DC conductor resistance(20, Max.) / 0.0221

14 Capacitance(nom.) / 0.219

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