---

И it ts planned to lay single core cables of a three-phase-system through steel pipes, all cables belonging to the same system have to pass through the same pipe.

It is recommended to protect the pipe against chocking with sand.

5 J .5 The cables shell be installed m such a way that the spread of fire and its consequences

are limited. The relevant specifications especially those for preventive fire protection shall be taken into account.

5 2 Lowest permitted metallation Itmfletdiurfl

The lowest allowed temperature of the cables during installation and mounting of accessories Is:

0°C for PVC or XLPE insulated and PVC sheathed cables according to HD 604 Pan 4 Section A,

The temperatures is valid tor the cable itself and not fot the surroundings. If the cable does have a lower temperature than permitted, it must be heated up.

Care has to be taken that the temperature remains above the lowest permitted during the whole laying operator).

a: For cables with copper conductors p » 50 NJmrn’ b: For cables with aluminium conductors o=25 N/mm* c: The maximum pulling force for all cables must not exceed 2D0D0N.

With these puiting forces it is guaranteed that the permitted elongation of 0.2% for the conductor wik not be exceeded. The mgxjmum pulling force {Pl ia calculated from the total of the C$A IS). The CSA of the screens and of the concentric conductor* shall not be considered in this calculation.

P-Sxo

where P in N о in МУггмті’ $ in mm³

15. times the саЫе diameter for single core cables 10 times the cable diameter for multicore cables

After mstalkabon the bending radius shall not fal below the following values:

15. times the cable diameter for single core cables

16. times the cable diameter for multicore cables

6.4.2 In case of single time bending of a core - for example, in front of a terminal - it is permitted to reduce the bending radius by 50% _r provided that the work is made by skiNed personnel and the cable is heated up to 30 ^PC and the cable is bent by means of a template.APPENDIX В

CURRENT RATING

The appropriate value of current-carrying capacities may be determined as described in I EC Publication 267. In each case account may be taken of the character! a tic* of the load.

The basic operating conditions for cables in air are as folows:

3O⁰C air temperature

continuous load'BLANK PAGE

SECTION B: CABLES WITH COPPER OR ALUMINIUM CONDUCTORS
AND TAPE ARMOUR

CONTENTS

1. Scope

2. Additional general requirements

   1. identification of cores

   2. >2 Cable marking and identification

   3. Additional test requirements

3. (Not sppkcaWel

4. Cables with metallic covering

   1. 1 Code designation

   2. Rated voltage

   3. Construction

   4. Tests

Tables: 1-4

Appendices;

A Guide to use

В Current ratings

R

ЙШ®

4-B-2

4-8-2

4-8-2

4-B-3

4-0-4

4B5

4-8-5

4-0-5

4-0-6

4-0-7

4-B-14

4-B23

eferences are made, in this Section В of Рал 4 of HD 604, to other Parts of this HD and to other Harmonisation Documents and International Standards as follows:

HD 106 Marking by inscription for the identification of cores of electric cables having more than five cores

HD 383 Conductors of insulated cables (Endorsing I EC 228 and 228AI

HD 405 Test* on electric cables undoc fire conditions

HD 505 Common test methods for insulating and sheathing materials of electric cables

HD 605 Electric cables : Additional test methods

IEC 287 Calculation of the continuous current rating of cables 1100% load factor}

IEC 502 Extruded solid dielectric insulated power cables for rated voltages from IkV to 30kV

In all cases reference to another HD or International Standard implies the latest edition of that document.

SECTION В

L Scopft

This section specifies requirements tor and dimensions of single core and multicore ethylene propylene rubber (EPR| compound it PM or EPDM) insulated and chlorosu donated polyethylene compound sheathed cables, having reduced fke propagation performance.

The maximum continuous conductor temperature shal not exceed SO °С. The maximum temperature for ehorvcircutr conditions is 2bO*C

This section covers the toilawing classes of cables:

1. 1,2 and 3 core cables having copper or aluminium conductors and metal tape armour {power cables).

2. 2 up to 19 core cables having copper conductor and metal tape armour (control cables),

2. Addibonal general requirements

The following general requirements shall ba read in conjunction with those given in Pan 1.

The cores of cables having two or more cores shall be identified by numbers L 2, 3_r 4, 7 and upwards marked on the black insulation.

Numbering shal be in accordance with HD 186 and *h*N be white

The method of cable marking shall comply with clause 3 of Pan 1 and the following additional requirements.

Category of the cables is identified by the colour in which the characteristics identification legends (see sub-dause 2,2.2) are marked on the cable's black sheath:

- low voltage power cable : light blu* - control cable і yellow

Characteristics are identified by indelible legends marked on ths oversheath along one axis of the cable and repeated in such a way that the interval between one end of the legend and the beginning of ths next does not exceed two metres. This identification comprises:

• a distinctive mark identifying the manufacturer;

• the year of manufacture,

• a reference allowing each manufacturing batch to be identified, marked either on the oversheath or on iM inner sheath, the manufacturer shall make known the place of this marking for each batch;

• the number of cores, nominal area and material of conductor*;

reference to the cable standard : HD 604 4 8.The metre marking (accurate to within ± 1 %) is marked in white colour on another axis of the cable.

1. .3.1 J When e sample of complete cable, approximately 20 m ki length is tested in accordance with sub-clause 3 2.1 of HD 606. using a test voltage of 3 kV for a duration of 16 min, the insulation shall not break down.

2. 3.1.2 When the complete cable length is tested in accordance with sub-clause 3.2.1 of HD 60S using a test voltage of 2 5 kV for a duration of 5 min, the insulation shal not break down.

After completion of the voltage lest given in sub-clause 2.3.1.1 above and when a sample of core is tested in accordance with sub-ciause 3.3 1 of HD 605, the Ki value shall not ba lass than:

3670 MQ km at 20^ftC

3.7 MD,km at 80 °С

2.3.3 Qietoctrie strength of over shea th

When tested in accordance with sub'dause 3.6*2 of HD 605 using a test vbhage as specified in 3.6.2.2 C. the overtheath shall not fail.

Alternatively, the teat can be as specified in sub clause 3.2.3 J of HD 605 using a test voltage of 10 kV de or 3 kV ac for a duration of one minute, without failure of the oversheath.

2.3.4 Measur

it of external diameter

When a sample of complete cable «s tested in accordance with aub-clause 2.1.3.1 of HD 605, the values obtained for the external diameter shall fan within the extreme values agreed between manufacture and purchaser.

2.3.5 Band test for complete cable

After a sample of complete cable has bean tested in accordance with subclause 2.4.1.1 of HD 605. it shall be subjected to the voltage test given in sub-clause 2.3.1.2. Nd breakdown shall occur and rhe sheaths shall not show any tear or crack.

The test temperature shad be ambient temperature.

The diameter of the test cylinder shall be:

12 D * 5%

where D is the actual external diameter of the cable sample, in mm.

2 3 6 Thermal endurance teat tor power cable

When an approximately 40 m length of complete cable is tested in accordance with sub-dause 5 1. Б of HD 605. no breakdown of the cade shafl occur.

The teat conditions shall be as follows:

la} conductor temperature |90±5]^eC

lb) time duration 5000 h

Icl number of thermal cycles 210

On completion of this test, the sample shall be subjected to:

la} voltage test according to sub-dause 2,3.1.1; the insulation shall not break down;

(b| insulation resistance check: the Ki value shall meet the requirements given in sub-clausa 2.3.2;

Icl checking the behaviour under fire conditions by test given in subclause 4,1.2 of HO 605: ft shall meet the requirements given in 2,3.8 below.

(d) the measurement of mechanical properties of the insulation and sheaths: it shall ba earned out in accordance with sub-clause 9.1 and 9.2 of HD 5051-1 the results of the tests are noted for Information.

The test shall be earned out in accordance with subdause 5J 4 of HD 605 under the following conditions:

(a) conductor temperature (90s2PC lb) time duration 1008 h 142 days).

At the end of the ageing procedure:

(a) The Ki value shal meet The requirements specified in sub-clause 2.3.2;

(b> the measurement of mechanical properties of the insulation and sheaths: it shall be carried out in accordance with sub-clause 9.1 and 9.2 of HD 505 11, the results of the tests are noted for information.

The characteristic of a cable in Category Cl shall be such that it meets the performance requirements of HD 406 1 and that, after having been tested in accordance with sub-dause 4,1.2 of HD 605, the two test pieces of cable shall comply with (he following condition:

On visual inspection, the part of the test рйсе located above the top of the chimney shall show no trace of combustion

3. Cables without metallic coverino

4. Not аррйсаЫв.Cablw with metallic соуєпгю

4 J Code designation

1. Under considaration in TC201

0.6/1 kV

Number of conductors:

’ 1, 2 or 3 for power cables with cross-sections equal to or exceeding 2.5mm’;

- 2, 3, 4, 7, 12, 14 or 19 for control cables with cross sections equal to 1mm’ and 1 .5mm¹.

The conductors shall be of the material and have the circular cross-sectional area specified in Table 4. The conductor shall comply with the requirements of HD 363 for diss 2: stranded conductors.

The insulation shall be an extruded ethylene propylene rubber IEPR) compound (EPM or EPDM) complying with the non- electrical requirements given In Table 1 and the insulation resistance requirements given in sub-clause 2.3.2

The insulation thickness shall comply with the values specified to Table 4.

The inner sheath shall consist of an extruded layer of chlorosulfonated polyethylene compound complying with the non-eiectrical requirements given in Table 2.

Its colour is black.

The nominal thickness of the inner sheath shall be calculated by the following formula:

e, = 0,035 D₁ + 1 mm

where D, is the fictitious diameter over laid-up core* calculated according to the method given in Appendix A of IEC Publication 502

However, the nominal thickness shall not be less than 1.4 mm for single core cables and I.Bnvn for multicore cables.

The mean value of the thickness of the inner sheath shal be not lass than the nominal value. However, the itMCkness at any place may be less than the nominal value provided that the difference does not exceed 0.1 mm 4 15% of the nominal value.

The ‘thermal screen* shall consist of glass fibre tapes and micaceous tapes. The total approximate thickness is 0.6 mm. It shall bo applied under and over the metallic armour

The armour shall consist of two tapes of 0.2 mm nominal thickness. It shall be of bare steel for cables having two or more cores, or tinned copper for single core cables.

The tape armour shall be applied helically in two layers so that the outer tape Its approximately central over the inner tape.

Tape armour shall comply with the following:

(al The gap between adjacent turns of each tape shall not exceed 50% of the width of the tape,

tbj The measured thickness of the tapes shall not differ from the nominal value, 0.2 mm, by more than 10% The method of measurement shall be in accordance with sub-clause 2.1.4<3<d of HD 606.

(cl The tapes shall be subjected to the wrapping test specified In sub-cUuse 2 4.2 of HD 60S, At the end of this test, a check is made that the armouring does not allow the underlying layer to appear at any point of the part of the sample of cable which has been bent

The oversheath shall consist of an extruded layer of chloro sulfonated polyethylene compound complying with the non-alectncai requirements given in cable 2.

Its colour is black.

The nominal thickness of the over shea th shall be calculated by the following formula:

e₃ = 0.035 D_? + 1mm

where D, Is the fictitious diameter immediately under the oversheath calculated according to the method given in Appendix A of IEC Publication 502.

However, the nominal thickness shall not be less than 1.4 mm for the single core cables and 1.8 mm for the multi-core cables.

4.4 Tests

Compliance with the requirements of sub-clause 4.3 shall be checked by inspection and by the teste specified in Table 3.

Before the type tests, the cable samples shal be maintained at the maximum temperature of the insidation in normal operation 180 °CJ tor five days by passing alternating current through the conductor or by keeping them in an air oven. After this ageing treatment, the samples shall be maintained at room temperature for 24 h.Рздз 447 HD 604 $1:1954 Pan 4 Secbon В

Table 1 - Requirements for the nori-electrical tests for ethylene propyisns rubber riwlation