HD 622 S1:1996/A2:2005

SLOVENSKI SIST HD 622 S1:1998/A2:2005

STANDARD
december 2005
Elektroenergetski kabli za nazivne napetosti od 3,6/6 (7,2) kV do vključno
20,8/36 (42) kV s posebnimi ognjevzdržnimi lastnostmi za uporabo v
elektrarnah
Power cables having rated voltages from 3,6/6 (7,2) kV up to and including 20,8/36
(42) kV with special fire performance for use in power stations
ICS 29.060.20 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

HARMONIZATION DOCUMENT HD 622 S1/A2
DOCUMENT D'HARMONISATION
HARMONISIERUNGSDOKUMENT August 2005

ICS 29.060.20
English version
Power cables having rated voltages
from 3,6/6 (7,2) kV up to and including 20,8/36 (42) kV
with special fire performance for use in power stations

Câbles d'énergie de tension assignée  Starkstromkabel mit Nennspannungen
de 3,6/6 (7,2) kV à 20,8/36 (42) kV inclus, von 3,6/6 (7,2) kV bis 20,8/36 (42) kV
ayant un comportement au feu particulier mit verbessertem Verhalten im Brandfall
et destinés aux centrales électriques für Kraftwerke

This amendment A2 modifies the Harmonization Document HD 622 S1:1996; it was approved by
CENELEC on 2005-05-01. CENELEC members are bound to comply with the CEN/CENELEC Internal
Regulations which stipulate the conditions for implementation of this amendment on a national level.

Up-to-date lists and bibliographical references concerning such national implementation may be obtained on
application to the Central Secretariat or to any CENELEC member.

This amendment exists in one official version (English).

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. HD 622 S1:1996/A2:2005 E

Page 0-2
FOREWORD
This amendment to the Harmonization Document HD 622 S1:1996 was prepared by WG9 of the
Technical Committee CENELEC TC 20, Electric Cables.

The text of the draft was submitted to the Unique Acceptance Procedure and was approved by
CENELEC as amendment A2 to HD 622 S1:1996 on 2005-05-01.

The following dates were fixed:

– latest date by which the existence of the amendment
has to be announced at national level  (doa) 2005-11-01

– latest date by which the amendment has to be
implemented at national level by publication
of a harmonized national standard or by endorsement (dop) 2006-05-01

– latest date by which the national standards conflicting
with the amendment have to be withdrawn  (dow) 2008-05-01

Users of HD 622 should note that, in the particular sections, cross-references have only been updated
where the complete section has been re-issued. This Part 0 of HD 622 contains a list of relevant
changes to cross-references, which should be consulted in conjunction with the particular section.
National standards implementing one or more particular sections of HD 622 may update cross-
references in advance of changes to the published version of the HD.

By decision of the Technical Board (D81/139 extended by D104/118 & D114/076) this HD exists only in
English.
Page 0-3
CONTENTS
(HD 622 S1:1996 plus Amendment No. 1 and Amendment No. 2)

1) 3)
Part 1 General requirements
Part 3  Single core and three core cables containing halogenated materials

3-A (Spare)
3-B (Spare)
3-C1 Three core PVC insulated and sheathed, non-radial field cables with aluminium conductors and
metallic tape armour
3-C2 Single core XLPE insulated and PVC sheathed cables with aluminium conductors and metallic
screen
3-C3 Three core EPR insulated and CSP sheathed, non-radial field cables with aluminium conductors
and metallic screen
3-D (Spare)
3-E (Spare)
1) 4)
3-F Single and three core cables containing halogenated materials for 6, 10 and 15 kV

1) 3)
3-G Single and three core cables containing halogenated materials, circular or shaped conductors

1)
3-H Single and three core cables with halogenated materials and with aluminium or steel wire
armouring
Part 4 Single core and three core cables with halogen-free materials

4-A Single and three core cables with halogen-free materials for 12, 17,5 and 24 kV

3)
4-B Single and three core cables with halogen-free materials and aluminium laminate or copper wire
screens
4-C Single core cable or assemblies with halogen free materials

2)
4-D Single core cables with halogen free materials

4-E EPR insulated with halogen free sheath, three core armoured cables

1) 3)
4-F Single or three core cables with copper or aluminium conductors

4-G (Spare)
2)
4-H Single and three core cables with non-halogenated materials and with aluminium or steel wire
armouring
3)
4-I Single core cables with halogen free materials and with aluminium alloy wire armouring

1)
Amendment No. 1 introduces some changes to the text
2)
Amendment No. 1 completely revises the Particular Section
3)
Amendment No. 2 completely revises the Particular Section
4)
Amendment No. 2 withdraws the Particular Section

Page 0-4
List of updated cross-references

Original Ref Original title New Ref New title
HD 48 Impulse tests on cables and their accessories EN 60230 Impulse tests on cables and their accessories
HD 186 Marking by inscription for the identification of cores of electric EN 50334 Marking by inscription for the identification of cores of electric
cables having more than 5 cores cables
HD 383 Conductors of electric cables EN 60228 Conductors of electric cables
HD 405.1 Tests on electric cables under fire conditions – Part 1: Test EN 60332-1-2 Tests on electric and optical fibre cables under fire conditions -
on a single vertical insulated wire or cable Part 1-2: Test for vertical flame propagation for a single
insulated wire or cable – Procedure for 1 kW pre-mixed flame
HD 405.3 Tests on electric cables under fire conditions – Part 3: Tests EN 50266 Common test methods for cables under fire conditions – Test
on bunched wires or cables (series) for vertical flame spread of vertically-mounted bunched wires
or cables
HD 505 Common test methods for insulating and sheathing materials EN 60811 Insulating and sheathing materials of electric cables –
(series) of electric cables (series) Common test methods
HD 602 Test on gases evolved during combustion of materials from EN 50267-2-2 Common test methods for cables under fire conditions – Test
cables – Determination of degree of acidity (corrosivity) of on gases evolved during combustion of materials from cables –
gases by measuring pH and conductivity Part 2-2: Procedures – Determination of degree of acidity of
gases for materials by measuring pH and conductivity
HD 606 Measurement of smoke density of electric cables burning EN 50268 Common test methods for cables under fire conditions –
(series) under defined conditions (series) Measurement of smoke density of cables burning under
defined conditions
IEC 502 Extruded solid dielectric insulated power cables for rated IEC 60502-2 Power cables with extruded insulation and their accessories for
voltages from 1 kV to 30 kV rated voltages from 1 kV (U = 1,2 kV) up to 30 kV (U = 36
m m
kV) – Part 2: Cables for rated voltages from 6 kV (U = 7,2 kV)
m
up to 30 kV (U = 36 kV)
m
IEC 754-1 Test on gases evolved during combustion of electric cables. EN 50267-2-1 Common test methods for cables under fire conditions – Tests
Part 1: determination of the amount of halogen acid gas on gases evolved during combustion of materials from cables –
evolved during the combustion of polymeric materials taken Part 2-1: Procedures – Determination of the amount of halogen
from cables acid gas
EN 50265-2-1 Common test methods for cables under fire conditions – Test EN 60332-1-2 Tests on electric and optical fibre cables under fire conditions -
for resistance to vertical flame propagation for a single Part 1-2: Test for vertical flame propagation for a single
insulated conductor or cable – Part 2-1: Procedures – 1 kW insulated wire or cable – Procedure for 1 kW pre-mixed flame
pre-mixed flame
Page 1-0
Part 1
PART 1: GENERAL REQUIREMENTS
Replace the complete part by the following

Page 1-1
Part 1
POWER CABLES HAVING RATED VOLTAGE FROM
3,6/6 (7,2) kV UP TO AND INCLUDING 20,8/36 (42) kV
WITH SPECIAL FIRE PERFORMANCE FOR USE IN POWER STATIONS

PART 1: GENERAL REQUIREMENTS
Page 1-2
Part 1
CONTENTS
1 General.1-4
1.1 Scope.1-4
1.2 Object.1-4
2 Definitions.1-4
2.1 Definitions relating to insulating and sheathing compounds .1-4
2.2 Definitions relating to the tests .1-5
2.3 Rated voltage.1-5
3 Marking.1-6
3.1 Indication of origin.1-6
3.2 Additional marking.1-6
3.3 Durability.1-6
3.4 Legibility.1-7
3.5 Common marking.1-7
3.6 Use of the name CENELEC.1-7
4 Core identification.1-7
5 General requirements for the construction of cables .1-7
5.1 Conductors.1-7
5.2 Conductor screening.1-8
5.3 Insulation.1-8
5.4 Assembly of cores and fillers and binder tape.1-9
5.5 Inner covering (bedding).1-9
5.6 Inner sheath.1-9
5.7 Metallic coverings.1-10
5.8 Outer sheath.1-10
5.9 Non-metallic components of halogen free cables.1-11
6 Tests on completed cables .1-11
7 (Spare).1-11
8 (Spare).1-11
9 Guide to use and selection of cables .1-11

Page 1-3
Part 1
References
Part 1 of HD 622 S1 incorporates by dated or undated reference, provisions from other publications.
These references are cited at the appropriate places in the text and the publications are listed hereafter.
For dated references, subsequent amendments to or revisions of any of these publications apply to
Part 1 of HD 622 S1 only when incorporated in it by amendment or revision. For undated references the
latest edition of the publication referred to applies.

EN 50266 (series) Common test methods for cables under fire conditions – Test for vertical flame
spread of vertically-mounted bunched wires or cables.

EN 50267 (series) Common test methods for cables under fire conditions - Tests on gases evolved
during combustion of materials from cables.

EN 50268 (series) Measurement of smoke density of electric cables burning under defined
conditions.
EN 50334 Marking by inscription for the identification of cores of electric cables

EN 60228 Conductors of insulated cables

EN 60332-1-2 Tests on electric and optical fibre cables under fire conditions - Part 1-2: Test for
vertical flame propagation for a single insulated wire or cable – Procedure for 1
kW pre-mixed flame
EN 60811 (series) Insulating and sheathing materials of electric cables - Common test methods

HD 21 Cables of rated voltages up to and including 450/750 V
and having thermoplastic insulation

HD 22 Cables of rated voltages up to and including 450/750 V and having crosslinked
insulation
HD 605 Electric cables – Additional test methods

Page 1-4
Part 1
1 General
1.1 Scope
HD 622 applies to rigid cables for fixed installations having rated voltages U /U (U ) from 3,6/6 (7,2)
o m
kV up to and including 20,8/36 (42) kV used in systems of voltages not exceeding the maximum r.m.s.
value of the system voltage U .
m
The insulation and sheaths may be either thermoplastic or thermosetting, halogenated or halogen
free. The cables are mainly intended for use in power generating plants and sub-stations. All cables
have specific fire performance requirements. Cables designed to be installed within the containment
area of nuclear power plants (LOCA cables), or cables specifically designed to be radiation resistant
are not included in this HD.
This Part 1 specifies the general requirements applicable to these cables; additional or deviating
requirements are given in the particular sections of this HD.

Test methods are specified in EN 50266, EN 50267, EN 50268, EN 60228, EN 60332-1-2, EN 60811,
HD 21, HD 22 and HD 605, which are referenced in the particular sections where relevant.

The particular types of cables are specified in Parts 3 and 4.

1.2 Object
The objects of this Harmonisation Document are:

– to standardise cables that are safe and reliable when properly used;

– to state the characteristics and manufacturing requirements directly or indirectly bearing on safety;

– to specify methods for checking conformity with those requirements.

2 Definitions
2.1 Definitions relating to insulating and sheathing compounds

2.1.1 Insulating and sheathing compounds

The types of insulating and sheathing compounds covered in this HD are listed below, together with
their abbreviated designations.

2.1.1.1 Thermoplastic polyvinyl chloride compound (PVC)

Combinations of materials suitably selected, proportioned and treated, of which the characteristic
constituent is polyvinyl chloride or one of its copolymers. The same term also designates compounds
containing both polyvinyl chloride and certain of its copolymers.

2.1.1.2 Cross-linked ethylene propylene rubber (EPR)

A compound based on ethylene propylene rubber or similar (EPM or EPDM) which when cross-linked
complies with the requirements given in the particular sections.

2.1.1.3 Cross-linked polyethylene (XLPE)

A thermosetting material formed by the cross-linking of thermoplastic polyethylene compound either
by chemical or irradiation methods so as to comply with the requirements given in the particular
sections.
Page 1-5
Part 1
2.1.1.4 Ethylene copolymers
Thermoplastic or cross-linked materials in which the characteristic constituent is a copolymer of
ethylene such as EVA, EEA, EMA, compound so as to comply with the requirements given in the
particular sections.
2.1.1.5 Chlorinated synthetic elastomeric compound

A vulcanised compound in which the characteristic constituent is polychloroprene rubber (PCP) or
other chlorinated synthetic elastomer, such as CSP, CPE or NBR/PVC, compounded so as to comply
with the requirements given in the particular sections.

NOTE The abbreviations PCP, CSP and CPE are those in common use. Equivalent codings according to ASTM
are CR, CSM and CM.
2.1.2 Type of compound
The category in which a compound is placed according to its properties, as determined by specific
tests. The type designation is not directly related to the composition of the compound.

2.2 Definitions relating to the tests

NOTE Tests classified as sample (S) or routine (R) may be required as part of any type approval scheme.

2.2.1 Type tests (symbol T)
Tests required to be made before supplying a type of cable covered by this HD on a general
commercial basis in order to demonstrate satisfactory performance characteristics to meet the
intended application. These tests are of such a nature that, after they have been made, they need not
be repeated unless changes are made in the cable material, design or type of manufacturing process
which might change the performance characteristics.

2.2.2 Sample tests (symbol S)
Tests made on selected lengths of completed cable, on samples of completed cable, or components
taken from a completed cable adequate to verify that the finished product meets the design
specifications.
2.2.3 Routine tests (symbol R)

Tests made on all production cable lengths to demonstrate their integrity.

2.2.4 Tests after installation

Tests intended to demonstrate the integrity of the cable and its accessories as installed.

2.3 Rated voltage
The rated voltage of a cable is the reference voltage for which the cable is designed, and which serves
to define the electrical tests.

The rated voltage is expressed by the combination of the following values U /U (U ) expressed in kV:
o m
U is the r.m.s. value between any insulated conductor and earth (metal covering of the cable or the
o
surrounding medium); e.g. U = 3,6 kV.
o
U is the r.m.s. value between any two phase-conductors of a multicore cable or of a system of single-
core cables; e.g. U = 6,0 kV.
U is the maximum r.m.s. value of the highest system voltage for which the equipment may be used;
m
e.g. U = 7,2 kV.
m
Page 1-6
Part 1
The standard rated voltages U /U(U ), in kV r.m.s. of the cables in this HD are as follows:
o m
U /U(U) = 3,6/6(7,2) 3,8/6,6(7,2) 6/6(7,2)
o m
6/10(12) 6,35/11(12) 8,7/15(17,5)
12/20(24) 18/30(36)
In an alternating current system, the rated voltage of a cable shall be at least equal to the nominal
voltage of the system for which it is intended.

3 Marking
3.1 Indication of origin
Cables shall be provided with an identification of origin consisting of the continuous marking of the
manufacturer's name or trademark, or (if legally protected) identification number, by one of the two
following alternative methods:

a) printed tape within the cable;
b) printing, indenting or embossing on the outer surface of the cable.

3.1.1 Continuity of marks
Unless otherwise specified in the particular sections, each specified mark shall be regarded as
continuous if the distance between the end of the mark and the beginning of the next identical mark
does not exceed:
– 550 mm if the marking is on the outer surface of the cable;

– 275 mm if the marking is on a tape.

NOTE A "specified mark" is any mandatory mark covered by this Part of the HD or by the particular requirements
of Part 3 onwards of this HD.
The diagram below shows an example of the marking as used on the outer surface of the cable,
where the word "ORIGIN" is for the mandatory information required for 3.1, and "XYZ" is one of the
other mandatory marks.
3.2 Additional marking
Additional marking may be specified in the particular sections.

3.3 Durability
Printed markings shall be durable. Compliance with this requirement shall be checked by the test
given in 2.5.4 of HD 605.
The printed legend shall be legible after the test.

Page 1-7
Part 1
3.4 Legibility
All markings shall be legible. Printed markings shall be in contrasting colours.

3.5 Common marking
Under consideration.
3.6 Use of the name CENELEC
The name CENELEC, in full or abbreviated, shall not be directly marked on or in the cables.

4 Core identification
The cores shall be identified by colours or numbers when specified in the particular section. Colouring
shall be achieved by the use of coloured insulation or by a coloured surface.

When identification is by numbers, they shall be printed in a colour which contrasts with the core
colours. In respect of size and characteristics of numerals marking shall comply with EN 50334 unless
otherwise specified.
The colours shall be clearly identifiable and durable. Durability shall be checked by the test given in
2.5.4 of HD 605.
Compliance with these requirements shall be verified by visual examination.

5 General requirements for the construction of cables
5.1 Conductors
5.1.1 Material
Conductors shall be either plain or metal-coated annealed copper or plain aluminium in accordance
with EN 60228, and with particular requirements in particular sections.

5.1.2 Construction
The minimum number of wires shall be in accordance with EN 60228, unless otherwise specified in
the particular section.
The classes of the conductors relevant to the various types of cables are given in the particular
section.
Conductors shall be either circular or sector in shape, and of solid metal or stranded.

5.1.3 Check of construction
Compliance with the requirements of 5.1.1 and 5.1.2 including the requirements of EN 60228 shall be
checked by inspection and by measurement.

5.1.4 Electrical resistance
The resistance of each conductor at 20°C shall be in accordance with the requirements of EN 60228
for the specified class of conductor.

Compliance shall be checked by the test specified in 3.1.1 of HD 605.

Page 1-8
Part 1
5.1.5 Separator tape
A separator tape may be placed between the conductor and the insulation. Unless otherwise specified
it shall be non-hygroscopic.
If the cable has a semi-conducting screen the tape shall also be semi-conducting.

It shall be easily removable from the conductor.

5.2 Conductor screening
When required in the particular section, a semi-conducting screen shall be applied over the conductor
either as a non-metallic tape or as an extruded layer, cross-linked when required, or a combination of
the two. The test requirements and the reference to test methods are specified in the particular
section.
5.3 Insulation
5.3.1 Material
The insulation shall be a compound as specified for each type of cable in the particular sections.

The test requirements and the reference to test methods are specified in the particular section.

The maximum conductor temperature in normal operation and the short circuit temperature for each
insulation are specified in the particular sections.

5.3.2 Application
The insulation shall be applied by an extrusion process, cross-linked when required, and shall form a
compact and homogenous body. Special requirements may be specified in the particular sections.

It shall be so applied that it fits closely on the conductor or over any separator tape or conductor
screen, if any, and it shall be possible to remove the insulation, including the conductor screen or
insulation screen if bonded.
5.3.3 Thickness
The mean value of the thickness of insulation, excluding semi-conducting layers, shall not be less than
the specified value for each type and size of cable shown in the tables of the particular sections.

However, the thickness at any place may be less than the specified value provided that the difference
does not exceed 0,1 mm + 10 % of the specified value.

Compliance shall be checked by the test specified in 2.1.1 of HD 605.

5.3.4 Insulation screening
When specified in the particular section, this shall consist of either a non-metallic semi-conducting
tape with or without an underlying coating of semi-conducting paint, or an extruded layer of semi-
conducting compound cross-linked when required, and a metallic layer consisting of lapped or
longitudinal tapes or circular or shaped wires or any combination of these.

The non-metallic part shall be applied directly over the insulation of each core and in intimate contact
with it, and shall fulfil the requirements specified in the particular sections.

The metallic part shall be applied directly over the insulation/non metallic screen, and in three core
cables the metallic layer around each core shall be in contact. Alternatively the metallic part may be
applied over a semi-conducting bedding enclosing the core assembly. The test requirements and the
reference to test methods are specified in the particular section.

Page 1-9
Part 1
5.4 Assembly of cores and fillers and binder tape

The cores shall be laid up. Where fillers and a binder tape are used they shall be non-hygroscopic
unless stated otherwise in the particular section, and there shall be no harmful reaction between them
and the adjacent cable components.

Compliance with this requirement shall be checked by the test specified in the particular sections.

5.5 Inner covering (bedding)
The inner covering if any may be extruded or lapped or a combination of the two, as specified in the
particular section.
5.5.1 Material
The material used for inner coverings shall be suitable for use at the maximum conductor temperature
of the cable in normal operation, and compatible with the cable components with which it is in contact.

Compliance with this requirement shall be checked by the test specified in the particular section.

5.5.2 Application
The extruded inner covering shall surround the core assembly completely and may penetrate the
spaces between them, giving the assembly a reasonably circular shape. The extruded inner covering
shall be easily separable from the cores.

Lapped covering shall consist of one or more layer of tape covering the entire outer surface of the core
assembly.
For each type of cable, the particular sections indicate whether that cable includes an extruded or
lapped inner covering or a combination of these.

5.5.3 Thickness
Unless otherwise stated in the particular sections no measurement is required for the extruded or
lapped inner covering. The thickness of inner covering may be detailed in the particular section.

5.6 Inner sheath
An inner sheath may be specified in the particular sections.

5.6.1 Material
The material used for the extruded inner sheath shall be suitable for use at the maximum conductor
temperature of the cable in normal operation and compatible with the cable components with which it
is in contact.
Test requirements and the reference to test methods are specified in the particular sections.

5.6.2 Application
The inner sheath shall be extruded in a single layer. The sheath may be applied over an inner
covering or directly over the core assembly. The sheath shall not adhere to the cores.

5.6.3 Thickness
The thickness of the extruded inner sheath shall be as specified in the particular sections.

Page 1-10
Part 1
5.7 Metallic coverings
Cables shall have a metallic layer surrounding the cores individually or collectively.

The following types of metallic covering may be specified in the particular sections:

a) metallic screen;
b) metal sheath;
c) metallic armour.
Detailed constructions of metallic coverings and their application, together with test methods and
requirements, are specified in the particular sections.

In an alternating current system the metallic covering shall be non-magnetic when applied to individual
cores of either single-core or three-core cables.

5.7.1 Dissimilar metals
5.7.1.1 Separation sheath
When the metal screen and the armour are of different metals they shall be separated by an
impervious extruded sheath suitable for the maximum conductor temperature of the cable in normal
operation and compatible with the cable components with which it is in contact.

Test requirements and the reference to test methods are specified in the particular sections.

5.8 Outer sheath
5.8.1 Material
The outer sheath shall be a compound suitable for use at the maximum conductor temperature of the
cable in normal operation, and of the type specified for each type of cable in the particular sections.

The test requirements and the reference to test methods for these compounds are specified in the
particular sections.
5.8.2 Application
The outer sheath shall be extruded and may consist of one or more layers.

A separator, consisting of a film or tape, may be placed under the outer sheath.

5.8.3 Thickness
Unless otherwise specified in the particular section the following requirements shall apply.

5.8.3.1 Sheath applied over a smooth surface

For a sheath applied on a smooth cylindrical surface, such as an inner covering or the insulation of a
single core the mean value of the thickness of the oversheath shall not be less than the specified
value for each type and size of cable shown in the tables of the particular sections.

However, the thickness at any place may be less than the specified value provided that the difference
does not exceed 0,1 mm + 15 % of the specified value.

Test methods are specified in 2.1.2 of HD 605.

Page 1-11
Part 1
5.8.3.2 Sheath applied over an uneven surface

For a sheath applied on an irregular cylindrical surface, such as a penetrating sheath on an
unarmoured cable without inner covering, or a sheath applied directly over armour or metallic screen,
the smallest thickness at any point of the outer sheath shall not fall below the value given in the
appropriate table of the particular section by more than 0,2 mm + 20 % of the specified value.

Test methods are specified in 2.1.2 of HD 605.

5.9 Non-metallic components of halogen free cables

All non-metallic components shall be halogen free. This shall be checked by the test specified in
EN 50267-2-2 unless otherwise specified in the particular section.

6 Tests on completed cables
All cables shall meet the requirements specified in the particular sections.

7 (Spare)
8 (Spare)
9 Guide to use and selection of cables
For guidance on the use of cables see particular sections of this HD.

Page 1-12
Part 1
BLANK PAGE
Page 3-F-0
Part 3 Section F
SECTION F
SINGLE OR THREE-CORE CABLES WITH COPPER OR ALUMINIUM
CONDUCTORS
Delete this section completely

NOTE:
For single core cables containing halogenated materials with copper or aluminium conductors, see
HD 620 Section 5-J;
For three core cables containing halogenated materials with copper or aluminium conductors, see
HD 620 Section 6-J
.
Page 3-G-0
Part 3 Section G
SECTION G
SINGLE OR THREE-CORE CABLES WITH COPPER OR ALUMINIUM,
ROUND OR SECTOR-SHAPED CONDUCTORS

Replace the complete section by the following.

Page 3-G-1
Part 3 Section G
SECTION G
SINGLE OR THREE-CORE CABLES WITH COPPER OR ALUMINIUM, ROUND
OR SECTOR-SHAPED CONDUCTORS
Contents Page
1 Scope.3-G-3

2 Additional general requirements
2.1 Identification of cores .3-G-3
2.2 Cable marking.3-G-3
2.3 Additional test requirements .3-G-4

3 Cable design
3.1 Code designation.3-G-7
3.2 Rated voltage.3-G-7
3.3 Construction.3-G-7
3.4 Tests.3-G-9

Annexes
A Guide to use.3-G-17
B Code designation.3-G-20
C Guidance on sample testing for harmonised long duration test method. 3-G-21

Tables
1 Requirements for the non-electrical test for cross-linked polyethylene .3-G-10
insulation
2 Requirements for the non-electrical test for polyvinyl chloride oversheath.3-G-12

3 Schedule of tests.3-G-14

4 General constructional requirements for single-core cables .3-G-16

5 General constructional requirements for three-core cables .3-G-16

Page 3-G-2
Part 3 Section G
REFERENCES
Section G of Part 3 of HD 622 incorporates by dated or undated reference, provisions from other
publications. These references are cited at the appropriate places in the text and the publications are
listed hereafter. For dated references, subsequent amendments to or revisions of any of these
publications apply to Section G of Part 3 of HD 622 only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies.

EN 50266 Common test methods for cables under fire conditions – Test for vertical flame spread
of vertically-mounted bunched wires or cables
EN 60228 Conductors of insulated cables
EN 60332-1-2 Tests on electric and optical fibre cables under fire conditions - Part 1-2: Test for
vertical flame propagation for a single insulated wire or cable – Procedure for 1 kW
pre-mixed flame
EN 60811 Common test methods for insulating and sheathing materials of electric cables
HD 605 Electric cables: Additional test methods
IEC 60229 Tests on cable oversheaths which have a special protective function and are applied by
extrusion
IEC 60502-2 Power cables with extruded insulation and their accessories for rated voltages from
1 kV (U = 1,2 kV) up to 30 kV (U = 36 kV) - Part 2: Cables for rated voltages from
m m
6 kV (U = 7,2 kV) up to 30 kV (U = 36 kV)
m m
Page 3-G-3
Part 3 Section G
1 Scope
This section specifies requirements for and dimensions of single core and three-core XLPE-
insulated and PVC-sheathed cables having higher fire propagation performance.

The maximum continuous conductor temperature shall not exceed 90 °C. The maximum
temperature for short-circuit conditions is 250 °C.

This section covers the following class of cable:

1 and 3-core screened cables having copper or aluminium, round or sector shaped conductors
rated 6/10(12) kV. Design and test parameters for cables rated 12/20(24)kV and 18/30(36)kV
can be found in HD 620 Part 5 Section M and Part 6 Section M.

2 Additional general requirements

The following general requirements shall be read in conjunction with those given in Part 1.

2.1 Identification of cores
No identification of the individual cores in a three-core cable is necessary.

2.2 Cable marking
The method of cable marking shall comply with Clause 3 of Part 1 and the following
additional requirements:
2.2.1 External marking
The external surface of all cables shall be legibly marked with the following
elements of marking:
Element   Example of marking

a) Code designation in   FXKJ
accordance with 3.1
b) Number and cross-section of conductors  3 × 150

c) Rated voltage (U)   12 kV
m
d) Year of manufacture   96
(two last digits)
The marking shall be made by printing, embossing or indenting on the
oversheath. The marking, if printed, must be resistant to conditions in the
ground.
The sequence of marks shall be as given above and the marks shall be kept
together in a group.
The distance between groups of marks shall not exceed 1 m.

2.2.2 Metre marking
A metre marking with reasonable accuracy shall be applied on the oversheath
and in such a way that it does not interfere with the marking in 2.2.1.

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Part 3 Section G
2.3 Additional test requirements

2.3.1 Categories of test
For the three different categories of test, given in Table 3, the following
additional requirements apply.

a) Routine test (R)
The tests shall be carried out on all delivery lengths. If the cable is
manufactured in lengths longer than the delivery lengths, routine tests
are allowed on the production lengths before being divided into delivery
lengths, on the condition that the cable after the tests has not been
subject to stress, which may influence the quality.

The sequence in which the routine test are carried out is at the
discretion of the manufacturer to suit the testing arrangements.

b) Sample test (S)
The tests shall be carried out on at least one delivery length in each
manufactured batch of cable but limited to not more than 10 % of the
total number of delivery lengths.

If the tested cable should fail in one or more of the sample tests, these
tests are repeated on two new samples taken from the same
manufactured batch of cable. If both samples meet the requirements in
the repeated tests, the cable shall be considered approved.

All sample tests shall be carried out on all cores in a three-core cable.

The sequence in which the sample tests are carried out is at the
discretion of the manufacturer to suit the testing arrangements.

c) Type test (T)
The electrical type tests with reference numbers 1.5 to 1.8 in Table 3
shall be carried out on one and the same sample of cable and in the
sequence as specified in the table. The sample shall be at least 10 m
long, terminations not included. The loss factor measurement,
reference number 1.6, may however be carried out on a different
sample.
Prior to the above tests the average value of the insulation thickness
shall be measured at both ends of the sample, using the method given
in Table 3, ref. no. 2.2. The average of the two measurements shall
not exceed the nominal value by more than 5 %.

2.3.2 Partial discharge test
When testing in accordance with HD 605, Subclause 3.10.1, the highest voltage
shall be 14 kV and the test voltage 9 kV.

The magnitude of discharge shall not exceed 5 pC in the tests.

The test shall be carried out on all cores in three-core cables.

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Part 3 Section G
2.3.3 Voltage test on insulation

When testing in accordance with HD 605, Subclause 3.2.1.1 a), the test voltage
shall be 30 kV and the duration 15 min.

There shall be no breakdown.
On three-core cables the test may be carried out with all conductors connected
together.
2.3.4 Voltage test on oversheath

When testing in accordance with IEC 60229, second edition (1982), Subclause
3.2, no breakdown shall occur.

Occasional points of breakdown can, however, be accepted on the condition
that they are repaired by a professional method so that all requirements for the
cable are fulfilled after the repair.

2.3.5 Loss factor measurement
When measuring in accordance with HD 605, Subclause 3.11.1, the test
voltage shall be 7 kV and the test temperature not below 95 °C and not above
100 °C.
-3
The measured value shall not exceed 10 .

2.3.6 Heating cycle voltage test

When testing in accordance with HD 605, Subclause 3.8.2, the test voltage
shall be 12 kV and the test temperature not below 95 °C and not above 100 °C.

No breakdown shall occur during the test.

In the partial discharge test the magnitude of discharge shall not exceed 5 pC.

2.3.7 Impulse voltage test followed by a.c. voltage test

When testing in accordance with HD 605, Subclause 3.2.4.2, the impulse
voltage level shall be 75 kV and the test temperature not below 95 °C and not
above 100 °C.
In the subsequent a.c. voltage test the test voltage shall be 15 kV.

No breakdown shall occur.
After completion of the tests ref. no. 1.5, 1.7 and 1.8 in Table 3, which shall all
be carried out on the same sample of cable, the sheath and any other layers
shall be removed from the sample to allow the metallic screen and the
insulation screen to be inspected. No wires in the metallic screen shall have
broken and no damage shall have occurred on the insulation screen. In three-
core cables it shall be possible to separate the cores and any fillers from each
other without damage to the insulation screens.

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Part 3 Section G
2.3.8 Harmonised long duration test

When testing in accordance with HD 605, Subclause 5.4.15, the following
...