Senior Vice President for - IECThe insulated conductors shall be twisted together. 2.4. The inner...

BUSINESS CONFIDENTIAL

Senior Vice President for

Planning, Development and Technology

Energy Resources & Technology Sector

Electrical R&D Laboratory

SPEC. NO

S.RL – 493 / 7.10

SUBJECT : UNSCREENED AND SCREENED POWER

CABLES FOR RATED VOLTAGE 0.6/1 kV

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07.01.2018 DATE

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1.4. Indicating for PVC insulated cables shall be in accordance with clause

13.5.2 of Israeli Standard SI 1516, part 1, or optionally using the

following letters:

NYY – unscreened cable with PVC insulation and outer sheath.

NYCY – screened cable with PVC insulation and outer sheath;

The following letters shall be used for indicating the cables whose

insulation is made of XLPE :

N2XY FR3 – Unscreened cable with XLPE insulation and PVC outer

sheath, flame retardant acc. to Category C.

N2XCY – screened cables with XLPE insulation and PVC outer

sheath.

1.5. Examples for cable code identification:

NYY 3x2.5, 0.6/1 kV: unscreened cable for rated voltage 0.6/1 kV with

three insulated and twisted together copper conductors of 2.5 mm²

cross-sectional area each.

N2XCY FR3 4x6/6, 0.6/1 kV: screened, flame retardant cable for

voltage 0.6/1 kV having 4 insulated and twisted copper conductors of 6

mm² cross-sectional area each and common screen of 6 mm² cross-

sectional area.

2. Cable design

2.1. The cables shall have 2, 3, 4, or 5 copper conductors with insulation of

PVC or XLPE. 2.2. The cross-sectional area of conductors shall be 1.5, 2.5, 4, 6, 10, 16, 25

or 50 mm².

2.3. The insulated conductors shall be twisted together.

2.4. The inner covering and fillers shall be applied over the insulated

conductors twisted together.

2.5. In the screened cables a screen of copper wires and/or copper tapes

shall be applied over the inner covering.

2.6. The PVC outer protective sheath shall be applied over the inner

covering for unscreened cables and over the screen for screened cables.






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2.7. The list of the cables according to the Specification follows in Table 1.

2.8. Lists of cables and their catalogue numbers according to the type of

their insulation (PVC or XLPE) and conductor's insulation colour

follow in Tables 2 - 5.

3. Technical requirements

3.1 Conductors

3.1.1. The conductors shall be stranded with annealed copper wires

according to IEC 60228, Class 2 or 5.

3.1.2. The values of conductor resistance shall not exceed the

appropriate maximal values specified in IEC 60228.

3.2. Insulation

3.2.1. For cables with PVC insulation the nominal and minimal

insulation thickness shall be in accordance with Israeli

Standard SI 1516, part 1, or optionally, with IEC Standard

60502, Part 1.

3.2.2. For cable with XLPE insulation the nominal and minimal

insulation thickness shall be in accordance with Israeli

Standard SI 1516, part 1.

3.2.3 The colours of the insulated conductors shall be in accordance

with Table 7A of Israeli Standard SI 1516, part 1.

3.3. Insulated conductors twisting

The insulated conductors shall be twisted together with the lay ratio

not more than 20.

Definition: The lay ratio is the relation between the lay absolute

value and the outer layer diameter.






SPEC. NO

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3.4. lnner Covering and Filler

3.4.1. The inner covering must be extruded.

3.4.2. The material used for inner covering and filler shall be

nonhygroscopic, suitable for the operating temperature of the

cable and compatible with the insulating material.

3.4.3. If the inner covering fills the interstices between the insulated

conductor (in direct contact or above a suitable separation tape)

it shall be possible to remove it from the insulated conductors

without leaving any remainder on the insulated conductors or

causing any damage to them.

3.4.4. The minimal thickness of inner covering shall be 0.4 mm.

.

3.5. Screen

3.5.1. The copper screen shall consist of a layer of spirally laid

wires with a tape applied in the form of an open spiral over

that wire layer-in the opposite laying direction or of tapes

only. If the screen is of tapes only they shall overlap.

3.5.2. The screen cross-sectional area is defined as geometrical

one. The screen geometrical cross-sectional area is

calculated as a total sum of cross sectional area of the screen

components (wire and/or tapes) when the wire cross section

is determined by its diameter and the tape cross section is

determined by the product of its width and thickness.

3.5.3. The value of cross-sectional area calculated according to

sub-clause 3.5.2 shall not be smaller than the values given in

Table 1.

3.5.4. The copper wires forming the screen shall be identical. Their

nominal diameter shall not be less than 0.5 mm. Electrical

resistivity of the wire shall comply with the requirements of

sub-clause 3.5.6.






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3.5.5. Thickness of the copper tape applied over the screen wires

shall be in the range between 0.1 and 0.3 mm. Electrical

resistivity of the tape shall comply with the requirement of

Clause 3.5.6.

3.5.6. Electrical resistivity of the screen components shall not

exceed 0.01786 Ωxmm²/m at 20ºC. The test method is given

in Clause 4.

3.6 Outer protective sheath

3.6.1 The outer protective sheath shall be made of PVC (type ST2).

The sheath nominal and minimal thickness shall be in

accordance with SI 1516-1.

3.6.2 For cable with PVC insulation the sheath colour shall be black.

3.6.3 For cables with XLPE insulation the sheath colour shall be

green.

4. Test methods

4.1. General

All the tests except the test for flame retardancy (for flame retardant

cables) and the outer sheath Spark test shall be carried out in

accordance with the requirements of SI 1516-1 and IEC Standard

60502-1.

4.2. Measurement of the screen electrical resistance

The cable screen electrical resistance shall be measured on the screen

removed from the finished cable.

The screen electrical resistivity shall be calculated in accordance with

the following equation:

/

Here: ρ - resistivity at 20ºC, Ωxmm²/m;

R- resistance as measured at 20ºC, Ω;

S - total geometrical cross-sectional area of the screen

components, mm²;






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L - screen component length as measured, m.

4.3. Flame retardancy test

The test shall be carried out in accordance with the requirements of

IEC Standard IEC 60332-3-24, Category C.

4.4. The outer protective sheath's Spark Test

The test shall be carried out in accordance with the requirements of IEC

Standard 62230.

4.5. Outer protective sheath integrity visual inspection

4.5.1. The test shall be carried out by visual inspection during the final

stage of the cable manufacturing or during the cable rewinding

onto the delivery drum.

4.5.2. The sheath has to be reasonably round, its surface has to be

smooth, without visible irregularities, cracks, inflates, dents,

hollows and so on.

5. Marking and packing

5.1. Marking

The marking of the cables shall be according to Clause 13.5 of Israeli

Standard SI 1516, part 1.

5.1.1 Throughout whole cable length at intervals not exceeding 1 m

the following marking shall be made by printing or by

reproduction in relief or engraved on the outer protective

sheath:

- Manufacturer's (trade) name;

- Cable code identification as given in sub-clause 1.4 of

this Specification.

- Year of the cable manufacture;

- Words "The I.E.C. property".

- Cable running length, in meters.

5.1.2 Any part of the marking shall be indelible, clearly visible and

readable.






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5.2. Packing

5.2.1. The cables shall be supplied on sturdy seaworthy wooden or

metal drums. The length of the conductors on each drum

shall be 500 meters + 3%. The drums will not be returned.

In addition the IEC reserves the right to order, on specific

occasions and as it sees fit, lengths of conductors that differ

from 500 meters, in which case the drums required may be

of different sizes, accordingly. Notice of such cases will be

given prior to execution of relevant draw orders or detailed

in the draw orders.

5.2.2. The bending radius of the cable on the drum shall be not less

than 15 outer cable diameters.

5.2.3. The cables shall be sealed at their ends and fixed reliably to

the drums.

5.2.4. The cable on the drum will be protected against damage by

wooden plates, mounted around the flanges of the drum, so

the drum will be closed from all sides.

5.2.5. A label shall be attached to the drum. The label shall bear the

following information:

- Drum serial number.

- Cable code identification (according to sub clause 1.4

of this specification), its cross sectional area and

I.E.C. catalogue number;

- Cable length;

- Gross weight;

- Year of the cable manufacture;

- Manufacturer's name;

- Purchaser's order number






SPEC. NO

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6. Documents/samples for the proposal

The Bidder will submit together with his offer the following:

6.1 Reference list and the sold quantities of the proposed cable/s or for

"similar" cable/s manufactured by the same technology during a period

of at least two (2) years (in the last five years) preceding the date of the

bid. "Similar" means: "Cable of the same type but a different/smaller

cross sectional area.

6.2 For each "group" proposed - Complete type test report according to the

specification requirements for the proposed cable or for a "similar"

cable manufactured by the same technology in which case must include

obligation to submit a complete type test report for the proposed cable

upon award of the bid.

6.3 Valid ISO 9001:2015 or ISO 9001:2008 certificate, issued by an

authorized inspection agency.

6.4 For each "group" proposed: 1 m' long sample of the cables will be

submitted together with the tender documents.

6.5 License issued by the Standards Institution of Israel (SII), that the

proposed cable\s meet\s the requirements of the official Israeli Standard

SI 1516-1 or bidder declaration that the proposed cable/s meet/s the

requirements of the official Israeli Standard SI 1516-1. In the last case,

the proposal must include obligation to submit the above license upon

award of the bid.

6.6 The summary of data completed and filled in.

All documents will be in English or Hebrew.

7. Documents for approval before supply (by awarded Contractor)

7.1 Routine and Sample Test reports of the batch should include the test results

and must be received by I.E.C at least two weeks before cable supply.

7.2 Complete type test report of the same type of cable, if it was not

submitted at the technical stage, must be received by R&D Laboratory






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of I.E.C at most six (6) weeks after the date on which a binding

contractual obligation has been created.

7.3 License issued by the Standards Institution of Israel (SII), that the

proposed cable\s meet\s the requirements of the official Israeli

Standard SI 1516-1, if it was not submitted at the technical stage. This

license must be received by I.E.C at most 3 months after the date on

which a binding contractual obligation has been created.

8. Acceptance tests

8.1 The I.E.C reserves the right to verify the compliance of the delivered

items with this specification.

8.2 Acceptance tests may be performed by I.E.C. before the release of the

cables from the contractor’s stores.

The Contractor shall make all the arrangements which are necessary

to enable IEC’s inspectors to perform the test for acceptance of the

cable.

The tests will be performed according to I.E.C. internal Specification.

Delivery which will not pass the acceptance tests will be rejected.

9. Access to Contractor's facilities and documents

I.E.C. shall have the right to inspect the cable manufacturing process and the

testing facilities at reasonable time.






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10. Tables

Table 1

Number of

conductors in

the cable

Cross-sectional area

of the conductors

mm²

Cross-sectional area of the screen

according to conductors cross-sectional

area, mm²

1.5 2.5 4 6 10 16 25 50

2 1.5, 2.5, 4, 6, 10, 16, 25,

50

1.5 2.5 4 6 10 -- -- --

3 1.5, 2.5, 4 1.5 2.5 4 - -- -- -- --

4 1.5, 2.5, 4, 6, 10, 16, 25,

50

1.5 2.5 4 6 10 16 16 --

5 2.5, 4, 6, 10, 16 -- -- - - -- -- -- --

Table 2. Unscreened PVC insulated cables (NYY)

Number of the

conductors and their

cross-sectional area, mm²

Marking on the insulation of the

conductors: by colours or/and by

numbers

Catalogue numbers

Not Flame

Retardant

Flame

Retardant

3 x 1.5 Brown, blue, yellow-green 2397842


5 x 6 Brown, brown with black strip, brown with

orange strip, yellow-green, blue

2400331

5 * 10 Brown, brown with black strip, brown with

orange strip, yellow-green, blue

2400596 2400612

Table 3. Screened PVC cables (NYCY)

Number of the conductors

and their cross-sectional

area, mm²



numbers

Catalogue numbers

Not Flame

Retardant

Flame

Retardant

4 x 2.5/2.5 Brown, brown with black strip, brown

with orange strip, blue

2400711

4 x 6/6 Brown, brown with black strip, brown


2400729



2400984






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Table 4. Unscreened XLPE cables (N2XY)



area, mm²



numbers

Catalogue numbers

Flame Retardant


5 x 1.5 Brown, brown with black strip, brown

with orange strip,

yellow-green, blue

2650018

2 x 2.5 Brown, blue 2401008

3 x 2.5 Brown, blue, yellow-green, 2437127



2401057


with orange strip,

yellow-green, blue

2736650

2 x 4 Brown, blue 2445609

3 x 4

Brown, brown with black strip, brown

with orange strip

2437085

Brown, blue, yellow-green 2736668

4 x 4 Brown, brown with black strip, brown


2437077


with orange strip, blue, yellow-green

2445617






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Table 4. Unscreened XLPE cables (N2XY), continued



area, mm²



numbers

Catalogue numbers

Flame Retardant

2 x 6 Brown, blue 2401081


with orange strip

2445591

3 x 6 Brown, blue, yellow-green 2445625



2401347


with orange strip, blue, yellow-green

2736676

2 x 10 Brown, blue 2401107



2401420


with orange strip, yellow-green, blue

2580314

2 x 16 Brown, blue 2401602



2387488


with orange strip, yellow-green, blue

2947240

2 x 25 Brown, blue 2401768

2 x 50 Brown, blue 2401800

Table 5. Screened XLPE cables (N2XCY)



area, mm²



numbers

Catalogue numbers

Flame Retardant



2432920



2432938






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Appendix A

SUMMARY OF DATA FOR PROPOSED CABLES

(The relevant paragraphs have to be filled only)

SUPPLIER’S NAME AND ADDRESS ……………………………………

MANUFACTURER'S NAME AND ADDRESS…………………………..

1. CABLE GENERAL DATA

1.1 STANDARD CODE DESIGNATION ………………...………………………

1.2 NUMBER OF I.E.C. SPECIFICATION……………………………………….

1.3. NAME AND NUMBER OF THE STANDARD ……………………………..

2. CONDUCTOR …………………………………….

2.1 NOMINAL CROSS-SECTIONAL AREA sq.mm…………………………….

2.2 NUMBER × NOMINAL DIAMETER OF WIRES mm……………………….

2.3 STRANDING SYSTEM ……………………………………………………….

2.4 FORM OF CONDUCTOR …………………………………………………….

2.5 DESIGNED DIAMETER OF CONDUCTOR mm…………………………….

2.6 MAXIMAL DIRECT CURRENT RESISTANCE Ohm/km………………… at 20º C

2.7 DESIGNED MAXIMAL CONTINUOUS CONDUCTOR TEMPERATURE ºC ……

2.8 DESIGNED MAXIMAL SHORT-CIRCUIT

CONDUCTOR TEMPERATURE ºC…………………………………………..

3. INSULATION

3.1 MATERIAL AND ITS CODE DESIGNATION………………………………

3.2 NOMINAL THICKNESS mm…………………………………………………

3.3 DESIGNED DIAMETER OVER INSULATION mm…………………………

3.4 COLOR CODE …………………………………………………………………

4. SCREEN

4.1 MATERIAL ……………………………………………………………………

4.2 NOMINAL CROSS-SECTIONAL AREA sq. mm……………………………

4.3 NUMBER x DIAMETER OF WIRES mm……………………………………

4.4 NUMBER OF TAPES …………………………………………………………

4.5 TAPE SIZE (THICKNESS x WIDTH) mm……………………………………

4.6 MAXIMAL DIRECT CURRENT RESISTANCE Ohm/km…………………at 20ºC






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5. FILLING AND INNER COVERING

5.1 FILLING MATERIAL …………………………………………………………

5.2 INNER COVERING ……………………………………………………………

5.3 INNER COVERING NOMINAL AND MINIMAL THICKNESS mm…………

6. OUTER SHEATH

6.1 MATERIAL AND ITS CODE DESIGNATION …………………………………

6.2 NOMINAL AND MINIMAL THICKNESS mm……………………………..…...

6.3 DESIGNED EXTERNAL DIAMETER mm………………………………………

7. GENERAL

7.1 TESTING VOLTAGE kV………………………………………………………….

7.2 PERMISSIBLE BENDING RADIUS mm…………………………………………

7.3 WEIGHT OF CABLE kg/km………………………………………………………

8. DRUMS

8.1 TYPE OF DRUM……… …………………………………………………………..

8.2 WEIGHT OF EMPTY DRUM kg………………………………………………….

8.3 LENGTH OF CABLE PER DRUM m…………………..…………………………

8.4 GROSS WEIGHT PER DRUM kg……………………………………………..….

8.5 DRUM OUTER DIMENSIONS

8.5.1 WIDTH mm………………………………………………………………

8.5.2 DIAMETER mm………………………………………………………….

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