Страница 77: ДСТУ HD 604 S1:2012. Кабелі електроживлення на напругу 0,6/1 кВ і 1,9/3,3 кВ зі спеціальними протипожежними характеристиками для застосування на електростанціях (62577)

•Той agreed between purchaser and manufacturer

APPENDIX В
Current-Carrying Capacity
(continued)

^,M To be agreed between purchaser and manufacturerTable 81 : Rated Current •carrying capacity» cablet in air

^I1J Rated current for cables in DC-Systems with return conductor far awayTable B2 r PerrrussAle short-circuit temperature end rated short time current densities

SECTION И ; CABLES WITH COPPER CONDUCTORS WITH AND WITHOUT CONCENTRIC
COPPER CONDUCTORS AND WITH OPTIONAL ARMOURING

CONTENTS

Pane

1. . Scope 54+2

2. Additional general requirements

   1. Identification of cores 5-М-2

   2. Cable marking 5*H*2

3. Cables with or without concentric conductor and optional armour

ЭЛ Rated voltage 54+2

3.2 Construction 5-H-3

4. Teats S4+4

TaWes: і 6 54+5

REFERENCES

References are made, in this Section H of Part б of HD 604, to other Part* of this HD and to other Harmonisation Documents and International Standards at follows:

HD 363 Conductors of insulated cables (Endorsing IEC 228 and 228A)

HD 405 Teste on electric cables under fire conditions

HD 506 Common test methods for insulating and sheathing materials of electric cables

HD 602 Test on gases evolved during the combustion of materials from cables : Determination of degree of acidity (corrosivity) of gases by measuring pH and conductivity

HD 605 Electric cables t Additional test methods

HD 606 Measurement of smoke density of electric cables burning under defined conditions

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

This section specifies requirements fur and dimensions of single-core end multi-core halogen-free cables having reduced fire performance. The cables are insulated and sheathed either with • thermoplastic or crosslinked compound. The cables may be armoured, and an additional halogen-free outer sheath may also be epptied.

The maximum continuous conductor temperature shal not exceed 70^QC for compounds НГГ2 and HMT2 or 9C⁹C for aM other compounds. The maximum permissible conductor temperature under short-circuit conditions is 160’C except for crosslinked compounds НІС and HMC where the corresponding temperature limit is 250°С,

2. Additional general reouirements

The following general requirements shall ba read in conjunction with those given in Part 1 of HD604.

The cores of cables having one up to five conductors shall be identified by colours In accordance with the following schemer

^rtl The identification of a core having a reduced c.s.a, shall be ’ green yellow for cables with green-yeHow core * blue for cables without green-yellow core

The method of cable marking shew comply as far as applicable with clause 3 of Part 1 and ihe following requirements:

The external surface of all cables shall be legibly marked with the type designation.

The type designation is under consideration.

2. . СаЫм without Of with concentric conductor aod optional armour

   1. Rated vcHtaog

0.6/1 kV

32 Construction

Only copper conductor* are permissible. The conductor* «hall comply with HD 383. CUss 1 for solid conductor* end Сіам 2 for stranded conductor*. Type of conductor end nominal c.e.a. of conductor are specified in Table 3. Ona conductor may have a reduced c.s.a. as specified in Table 4. Over the conductor a tape may be applied.

The insulation shall ba a halogen-free thermoplastic 1HIT1 or HIT21 or halogen-free crosslinked (НІС) compound and sh*N comply with the requirement* and tests specified ki ТаЫе 1A, The insulation wad thickness shai comply with the minimum value specified In Table 5; the mean is not repuirad.

Over the Insulation of multi-core cables, a halogen-free separating element may be applied; it shall be applied over the insulation of single core cables with concentric conductor. Insulation and sheath of single-core cables shall be separable.

The cores of cables having two up to five cores shall be cabled. Over the laid up cores a halogen-free binder tap* may be applied.

The core assembly of mufti-core cables may ba covered completely by a halogen-free inner covering which shall be easily removable. It may consist either:

• of a taped bedding;

• of an extruded bedding compound, or - of a combination of the two.

Halogen free fillers for the interstices may be applied.

Th* concentric conductor, if any, shall consist of copper wires with one or two copper tapes.

Th* concentric conductor shall be applied:

• over the separating layer of single-core cables respectively;

• over the inner covering of muhhcore cables.

The calculated mean specs between adjacent wees shall not exceed 4.0mm wd th* maximum space between adjacent wires shall be not more than 8.0mm.

A halogen-free separating layer may be applied over the concentric conductor. The d.c. resistance of the concentric conductor shall comply with the relevant value given in HD 383.

The extruded inner sheath shall be only applied In armoured cables.Psge б-Н-4

HD $1:1994

Pvt 6 Section H

The extruded inner sheath shall be • halopen-free thermoelastic (HMT1 or HMT2) or halogen- free cross-linked (HMC) compound end shell comply with the requirements and tests specified in Table 1B. The colour й not specified.

The minimum wall thickness of the extruded inner sheath shall not be leu than the value specified for the insulation wal thickness of the enclosed phase conductors.

The armour, if any, is composed either of two lead covered steal tapes or copper tapes, helically applied In the same direction, or of one layer of flat wires, made of galvanised steel or aluminium alloy.

The thickness of the steel tapes shall be 0.15 mm minimum and the thickness of the copper tapes shal be not less than OJO mm. The Hat wires shall be minimum 1 -2 mm thick-

The outer sheath shall be a hak>gen-froe thermoplastic IHMT1 or HMT2I or halogen-free cross- linked (HMC) compound and shall comply with the requirement* end tests specified in Table 1B. The colour is not specified.

The sheath waN thickness shall comply with the minimum value specified kt Table в; the mean value is not specified.

4- Tests

Compiance with the requirements of clause 3 she* be checked by inspection and by the tests specified tn Tables 1 to 6.

Table 1A - Requirement* end mt* for the insulating compound*