SIST HD 21.1 S4:2003
(Main)Cables of rated voltages up to and including 450/750 V and having thermoplastic insulation - Part 1: General requirements
Cables of rated voltages up to and including 450/750 V and having thermoplastic insulation - Part 1: General requirements
Superseded by EN 50525-1:2011
Starkstromleitungen mit thermoplastischer Isolierhülle für Nennspannungen bis 450/750 V - Teil 1: Allgemeine Anforderungen
Conducteurs et câbles isolés avec des matériaux thermoplastiques de tension assignée au plus égale à 450/750 V - Partie 1: Prescriptions générales
Kabli s polivinilkloridno izolacijo za naznačene napetosti do vključno 450/750 V - 1. del: Splošne zahteve
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST HD 21.1 S4:2003
01-februar-2003
1DGRPHãþD
SIST HD 21.1 S3:1998
.DEOLVSROLYLQLONORULGQRL]RODFLMR]DQD]QDþHQHQDSHWRVWLGRYNOMXþQR9
GHO 6SORãQH]DKWHYH
Cables of rated voltages up to and including 450/750 V and having thermoplastic
insulation - Part 1: General requirements
Starkstromleitungen mit thermoplastischer Isolierhülle für Nennspannungen bis 450/750
V - Teil 1: Allgemeine Anforderungen
Conducteurs et câbles isolés avec des matériaux thermoplastiques de tension assignée
au plus égale à 450/750 V - Partie 1: Prescriptions générales
Ta slovenski standard je istoveten z: HD 21.1 S4:2002
ICS:
29.060.20 Kabli Cables
SIST HD 21.1 S4:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST HD 21.1 S4:2003
HARMONIZATION DOCUMENT HD 21.1 S4
DOCUMENT D'HARMONISATION
HARMONISIERUNGSDOKUMENT November 2002
ICS 29.060.20 Supersedes HD 21.1 S3:1997
English version
Cables of rated voltages up to and including 450/750 V
and having thermoplastic insulation
Part 1: General requirements
Conducteurs et câbles isolés Starkstromleitungen mit thermoplastischer
avec des matériaux thermoplastiques Isolierhülle für Nennspannungen
de tension assignée au plus égale bis 450/750 V
à 450/750 V Teil 1: Allgemeine Anforderungen
Partie 1 : Prescriptions générales
This Harmonization Document was approved by CENELEC on 2002-09-01. CENELEC members are
bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
implementation of this Harmonization Document 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 Harmonization Document exists in three official versions (English, French, German).
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, 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
© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. HD 21.1 S4:2002 E
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Foreword
This edition 4 of HD 21.1 has been prepared by the Technical Committee CENELEC TC 20,
Electric cables.
HD 21 was originally adopted by CENELEC on 9th July 1975.
Edition 2 of HD 21 was implemented on 1st January 1984. A third edition of Part 1 was published
in September 1997.
th
This 4 edition provides a full updating, including incorporation of amendments ratified during the
maintenance of Part 3 onwards of HD 21, and introduces other improvements.
HD 21.1 S4 is related to IEC 60227-1:1993, but is not directly equivalent.
HD 21 now has the following parts:
HD 21.1 S4 General requirements
HD 21.2 S3 Test methods
HD 21.3 S3 Non sheathed cables for fixed wiring
HD 21.4 S2 Sheathed cables for fixed wiring (Reprint)
HD 21.5 S3 Flexible cables (cords)
HD 21.6 (Spare)
HD 21.7 S2 Single core non-sheathed cables for internal wiring for a conductor
temperature of 90 °C
HD 21.8 S2 Single core non-sheathed cables for decorative chains (with A1 inclusive)
HD 21.9 S2 Single core non-sheathed cable for installation at low temperatures
HD 21.10 S2 Extensible leads
HD 21.11 S1 Cables for luminaires
HD 21.12 S1 Heat-resistant flexible cables (cords)
HD 21.13 S1 Oil resistant PVC sheathed cables with two or more conductors
HD 21.14 S1 Flexible cables (cords), insulated and sheathed with halogen-free
thermoplastic compounds
In order that this revision of Part 1 of HD 21 does not introduce unnecessary changes to long-
established clause numbers, the normative references (which would otherwise be inserted as
clause 2 are given in annex A.
The text of the draft was submitted to the Unique Acceptance Procedure and was approved by
CENELEC as HD 21.1 S4 on 2002-09-01.
The following dates were fixed:
- latest date by which the existance of the HD (doa) 2003-03-01
has to be announced at national level
- latest date by which the HD has to be (dop) 2003-09-01
implemented at national level by publication of
a harmonized national standard or by
endorsement
- latest date by which the national standards (dow) 2003-09-01
conflicting with the HD have to be withdrawn
Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given for information only.
In this standard, annex A is normative and annex B is informative.
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Contents
Page
1 General
1.1 Scope. 4
1.2 Object. 4
1.3 Common Marking. 4
2 Definitions
2.1 Definitions relating to insulating and sheathing materials. 5
2.2 Definitions relating to the tests. 5
2.3 Rated voltage. 5
3 Marking
3.1 Indication of origin. 6
3.2 Continuity of marks. 7
3.3 Durability. 7
3.4 Legibility. 7
3.5 Common Marking. 7
3.6 Use of the name CENELEC . 8
3.7 Code designation . 8
4 Core identification
4.1 General requirements . 8
4.2 Colour schemes. 8
4.3 Colour combination green-and-yellow. 9
4.4 Core identification of flexible cables by the "Marking by inscription” method . 9
5 General requirements for the construction of cables
5.1 Conductors. 9
5.2 Insulation. 10
5.3 Filler. 15
5.4 Other components. 15
5.5 Sheath. 16
5.6 Tests on completed cables. 20
6 Guide to use of the cables. 24
Annex A (normative) Normative references . 25
Annex B (informative) National marking . 26
Table 1 – Requirements for the non-electrical tests for thermoplastic insulation. 12
Table 2 – Requirements for the non-electrical tests for thermoplastic sheath. 18
Table 3 – Requirements for electrical tests for thermoplastic insulated cables . 21
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1 General
1.1 Scope
HD 21 applies to rigid and flexible cables with insulation and sheath, if any, based
on thermoplastic materials, of rated voltages U /U up to and including 450/750 V,
o
used in power installations.
NOTE For some types of flexible cables, the term "cord" is used.
This Part 1 specifies the General Requirements applicable to these cables.
The test methods specified are given in Part 2 of this Harmonisation Document
(HD), or in the common test methods for cables given in EN 50265, EN 50267,
EN 50268 and EN 60811.
The particular types of cables are specified in Part 3 onwards of this HD, which
are hereafter referred to as "the particular specifications".
The code designations of these types of cables are in accordance with HD 361.
1.2 Object
The objects of this HD are to standardise cables and cords that are safe and
reliable when properly used, to state the characteristics and manufacturing
requirements directly or indirectly bearing on safety, and to specify methods for
checking conformity with those requirements.
1.3 Common Marking
1.3.1 General
The Common Marking () signifies that the manufacturer has been
assessed and his production is subjected to continuing surveillance in
accordance with the technical procedures by a recognised national
Approval Organisation which is a signatory to the "Agreement on the use
of a Commonly Agreed Marking for Cables and Cords complying with
Harmonised Specifications."
Compliance with this HD may be certified by the application of the
1)
agreed technical procedures for granting the Common Marking , which
are the recognised means of ensuring that a manufacturer is competent
and takes all reasonable care to produce cables complying with this HD.
The Common Marking may be used, under these conditions, by
manufacturers in countries which have implemented this HD and in
which the national Approval Organisations are signatories to the
Agreement.
NOTE See annex B to Part 1 for guidance on national marking.
1)
These are given in Appendices 4 and 5 of the 'Agreement on the use of a Commonly Agreed Marking for Cables and
Cords complying with Harmonised Specifications'.
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1.3.2 Extensible leads
For extensible leads the Common Marking, as defined in paragraph one
of 1.3.1 is shown by a special mark ( COIL or CCCCC)
in association with the indication of origin.
This mark signifies that the coiling process has been carried out in a
controlled manner and that the product will meet the requirements of this
HD. The application of this additional mark also signifies that the
producer of the extensible lead is subject to regular and systematic
surveillance by a signatory to the agreement as a condition for use of that
mark.
2 Definitions
2.1 Definitions relating to insulating and sheathing materials
2.1.1
type of compound
the category in which a compound is placed according to its properties, and
determined by specific tests. The type designation is not directly related to the
composition of the compound
2.1.2
polyvinyl chloride compound (PVC)
combinations of materials, of which polyvinyl chloride is the characteristic
constituent, suitably selected, proportioned and treated which meet the
requirements given in the particular specification
2.2 Definitions relating to the tests
2.2.1
type tests (Symbol T)
tests required to be made before supplying a type of cable covered by this
standard 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 materials, design or type of manufacturing
process which might change the performance characteristics
2.2.2
sample tests (Symbol S)
tests made 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
2.3 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.
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The rated voltage is expressed by the combination of two values U /U, expressed
o
in volts:
U being the r.m.s. value between any insulated conductor and "earth" (metal
o
covering of the cable or the surrounding medium);
U being the r.m.s. value between any two phase-conductors of a multicore
cable or of a system of single-core cables.
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.
This condition applies both to the value U and to the value U.
o
In a direct current system, the nominal voltage between conductors shall be not
higher than 1,5 times the rated voltage (U) of the cable, and the nominal voltage
between any conductor and earth shall not be higher than 1,5 times the rated
voltage (U ) of the cable.
o
NOTE The operating voltage of a system may permanently exceed the nominal voltage of such a
system by 10 %. A cable can be used at a 10 % higher operating voltage than its rated voltage if the
latter is at least equal to the nominal voltage of the system.
3 Marking
3.1 Indication of origin
3.1.1 General
Cables shall be provided with an identification of origin consisting of
either
1. the manufacturer's identification thread, or,
2. the continuous marking of the manufacturer's name or trademark, or
(if legally protected) identification number, by one of the three
following methods;
a) printed tape within the cable;
b) printing, indenting or embossing on the insulation of at least one
core (the core coloured blue, if any)
c) printing, indenting or embossing on the sheath, if any.
3.1.2 Extensible leads
For extensible leads an additional mark of indication of origin shall be
applied to identify the coiler. It shall consist of one of the following:
1. an additional embossed mark clearly discernible on the extensible
part regardless of any additional processing such as the moulding on
of a plug;
2. an additional moulded mark subject to the conditions as in 1 above;
3. the addition of a sleeve bearing a clear and indelible marking which
shall remain identifiable during normal use and which shall not be
removed during any further processing;
4. additional printing on the ends of the extensible lead, provided such
marking shall not be obliterated during any subsequent processing
and remains identifiable during normal use.
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3.2 Continuity of marks
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 sheath of the cable
- 275 mm if the marking is:
(i) on the insulation of an unsheathed cable,
(ii) on the insulation of a sheathed cable,
(iii) on a tape within a sheathed cable.
NOTE A 'Specified Mark' is any mandatory mark covered by this Part 1 of the HD or by the particular
requirements of Part 3 onwards of this HD, or the optional Common Marking ().
The diagram below shows an example of the marking as used on the insulation
of an unsheathed cable.
This requirement shall not apply to the additional marking for extensible leads
described in 3.1.2 of this Part 1.
3.3 Durability
Printed markings shall be durable. Compliance with this requirement shall be
checked by the test given in 1.8 of Part 2.
3.4 Legibility
All markings shall be legible.
The colours of the identification threads shall be easy to recognise or easily made
recognisable, if necessary by cleaning with petrol or other suitable solvent.
3.5 Common Marking
3.5.1 General
If the Common Marking () is used, it shall be as specified in the
"Agreement on the use of a Commonly Agreed Marking for Cables and
Cords complying with Harmonised Specifications". It shall consist of
either
1. the common thread as specified and allotted in appendix 2 to the
above mentioned "Agreement", or,
2. a continuous (see 3.2) marking of the symbols specified and allotted
in appendix 1 to the above mentioned "Agreement", by one of the
three methods a), b), c) specified in 3.1.1.
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3.5.2 Extensible leads
If under the terms of the above mentioned 'Agreement' the Common
Marking for extensible leads ( COIL or CCCCC) is used
it shall consist of one of the markings described for extensible leads in
3.1.2 and shall be applied in association with the indication of origin.
3.6 Use of the name CENELEC
The name CENELEC, in full or abbreviated, shall not be marked on, or in, the
cables.
3.7 Code designation
Each cable or cord shall have its full code designation marked continuously (see
3.2) on the sheath or on the insulation of one core. The code designation for each
cable is given in the particular specifications in Part 3 onwards of this HD.
NOTE The particular specifications in Part 3 onwards of this HD presently specify either no such
marking, or marking of only part of the code designation. The requirement in this 3.7 supersedes that
in the particular specifications, which will be amended in due course.
4 Core identification
4.1 General requirements
Identification of the cores of a cable shall be achieved by the use of coloured
insulation or by a coloured surface.
Each core of a multicore cable shall have only one colour, except the core
identified by a combination of the colours green-and-yellow. In multicore cables,
the colours green and yellow shall not be used separately as single colours.
The colours shall be clearly identifiable and durable. Durability shall be checked
by the test given in 1.8 of Part 2.
4.2 Colour schemes
4.2.1 Flexible cables
The core colours, and their rotational position, for flexible cables and
cords shall be in accordance with HD 308.
4.2.2 Single core non-sheathed cables
The core colours, which should be a reasonable match to those given in
HD 402, shall be chosen from the following:
a) for cable types rated 300/500 V (H05 types) the following
mono-colours are recognised: black, blue, brown, grey, orange, pink,
red, turquoise, violet, white, green and yellow. Bi-colours of any
combination of the above mono-colours are permitted. The
distribution of the colours for the core bi-coloured green-and-yellow
shall comply with 4.3 of Part 1;
NOTE The use of green or yellow in some countries may be forbidden or restricted
by national safety or other regulations. In some countries, green is specifically
permitted for decorative chains
b) for cable types rated 450/750 V (H07 types) the following
mono-colours are recognised: black, blue, brown, grey, orange, pink,
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red, turquoise, violet and white. Bi-colours shall not be used except
the combination of the mono-colours green and yellow, the
distribution of the colours of which shall comply with 4.3 of Part 1.
NOTE Other mono-colours are permitted by national standards, pending
CENELEC TC 64 harmonisation of installation rules.
4.2.3 Multicore sheathed cables for fixed wiring
The core colours shall be in accordance with HD 308.
4.3 Colour combination green-and-yellow
The distribution of the colours for the core coloured green-and-yellow shall
comply with the following condition: for every 15 mm length of core, one of these
colours shall cover at least 30 % and not more than 70 % of the surface of the
core, the other colour covering the remainder.
NOTE Information on the use of the colours green-and-yellow and blue.
It is understood that the colours green and yellow, when they are combined as specified above are
recognised exclusively as a means of identification of the core intended for use as earth connection or
similar protection, and that the colour blue is intended for the identification of the core intended to be
connected to neutral. If, however, there is no neutral, blue can be used to identify any core except the
earthing or protective conductor.
4.4 Core identification of flexible cables by the "Marking by inscription"
method
Where the cores of cables are identified by marking by inscription, this shall be in
accordance with EN 50334.
5 General requirements for the construction of cables
5.1 Conductors
5.1.1 Material
The conductors shall consist of annealed copper, except for the wires of
tinsel cords, for which a copper alloy may be used. The wires may be
tinned.
5.1.2 Construction
The maximum diameters of the wires of flexible conductors - other than
the conductors of tinsel cords - and the minimum number of the wires of
rigid conductors shall be in accordance with HD 383.
The classes of the conductors relevant to the various types of cables are
given in the particular specifications.
Conductors of cables for fixed installations shall be circular solid, circular
stranded or compacted circular stranded conductors.
For tinsel cords each conductor shall comprise a number of strands or
groups of strands, twisted together, each strand being composed of one
or more flattened wires of copper or copper alloy, helically wound on a
thread of cotton, polyamide or similar material.
5.1.3 Check of construction
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Compliance with the requirements of Part 1, 5.1.1 and 5.1.2, including
the requirements of HD 383, shall be checked by inspection and by
measurement.
5.1.4 Electrical resistance
For cables other than tinsel cords the resistance of each conductor at
20 °C shall be in accordance with the requirements of HD 383 for the
given class of the conductor.
For tinsel cords, the maximum resistance at 20 °C shall be as specified
in Part 5, clause 2.
Compliance shall be checked by the test given in 2.1 of Part 2.
5.2 Insulation
5.2.1 Material
The insulation shall be a thermoplastic material of the type specified for
each type of cable in the particular specifications.
Types TI 1, TI 2, TI 4 and TI 5 for cables insulated with PVC compound
o
and suitable for a maximum continuous conductor temperature of 70 C.
Type TI 3 for cables insulated with PVC compound and suitable for a
maximum continuous conductor temperature of 90 °C.
The test requirements for these compounds are specified in Part 1
Table 1.
The maximum continuous conductor operating temperatures for each
insulation compound, and the maximum temperatures for short-circuit
conditions, are given in Table 1.
NOTE The maximum operating and short-circuit temperatures for a particular cable may
be lower than that given for the specific insulation compound. See HD 516 for further
guidance.
5.2.2 Application to the conductor
The insulation shall be so applied that it fits closely on the conductor, but,
for cables other than tinsel cords, it shall be possible to remove it without
damage to the insulation itself, to the conductor or to the tin coating if
any. Compliance shall be checked by inspection and by manual test.
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5.2.3 Thickness
The mean value of the thickness of insulation shall be not less than the
specified value for each type and size of cable shown in the tables of the
particular specifications.
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 given in 1.9 of Part 2.
5.2.4 Mechanical properties before and after ageing
The insulation shall have appropriate mechanical characteristics within
the temperature limits to which it may be exposed in normal use.
Compliance shall be checked by carrying out the tests specified in Part 1,
Table 1.
The applicable test methods and the results to be obtained are specified
in Part 1, Table 1.
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Table 1 - Requirements for the non-electrical tests for thermoplastic insulation
1 2 3 4 5 6 7 8 9 10
Ref Test Unit Test method Type of compound
No described in
EN 60811
Section Sub- TI 1 TI 2 TI 3 TI 4 TI 5
clause
Maximum continuous
°C 70 70 90 70 70
conductor temperature
Maximum temperature for
160 160 160 160 160
°C
short circuit conditions
1 Mechanical properties
1.1 Properties before ageing 1-1 9.1
1.1.1 Values to be obtained for the
tensile strength:
2
- median, min N/mm 12,5 10,0 15,0 12,5 10,0
1.1.2 Values to be obtained for the
elongation at break:
- median, min % 125 150 150 125 150
1.2 Properties after ageing in air 1-2 8.1
oven
1.2.1 Ageing conditions:
- temperature
°C 80 ± 2 80 ± 2 135 ± 2 80 ± 2 80 ± 2
- duration of treatment h 7 x 24 7 x 24 14 x 24 7 x 24 7 x 24
1.2.2 Value to be obtained for the
tensile strength:
2
- median, min N/mm 12,5 10,0 15,0 12,5 10,0
(1)
- variation , max % ± 20 ± 20 ± 25 ± 20 ± 20
1.2.3 Values to be obtained for the
elongation at break:
- median, min % 125 150 150 125 150
(1)
- variation , max %
± 20 ± 20 ± 25 ± 20 ± 20
2 Loss of mass test 3-2 8.1
2.1 Ageing conditions
- temperature
°C 80 ± 2 80 ± 2 115 ± 2 80 ± 2 80 ± 2
- duration of treatment h 7 x 24 7 x 24 14 x 24 7 x 24 7 x 24
2
2.2 Values to be obtained for the mg/cm 2,0 2,0 1,5 2,0 2,0
loss of mass, max
NOTES: see end of table.
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Table 1 - Requirements for the non-electrical tests for thermoplastic insulation (continued)
1 2 3 4 5 6 7 8 9 10
Ref Test Unit Test method Type of compound
No described in
EN 60811
Section Sub- TI 1 TI 2 TI 3 TI 4 TI 5
clause
Maximum continuous
°C 70 70 90 70 70
conductor temperature
Maximum temperature for
160 160 160 160 160
°C
short circuit conditions
3 Compatibility test (2)
3.1 Ageing conditions 1-2 8.1.4 (3) (3) - (3)
- temperature
°C 100 ± 2
- duration of treatment h 14 x 24
3.2 Mechanical properties after
ageing
Values to be obtained (4) (4) (4) - (4)
4 Heat shock test 3-1 9.1
4.1 Test conditions:
- temperature
°C 150 ± 2 150 ± 2 150 ± 2 150 ± 2 150 ± 2
- duration of treatment h 1 1 1 1 1
4.2 Result to be obtained (5) (5) (5) (5) (5)
5 Pressure test at high 3-1 8.1
temperature
5.1 Test conditions:
- force exerted by the blade 3-1 8.1.4 (6) (6) (6) (6) (6)
- duration of heating under 3-1 8.1.5 (6) (6) (6) (6) (6)
load
- temperature
°C 80 ± 2 70 ± 2 90 ± 2 80 ± 2 70 ± 2
5.2 Result to be obtained:
- median of the depth of % 50 50 50 50 50
indentation, max
NOTES: see end of table.
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Table 1 - Requirements for the non-electrical tests for thermoplastic insula
...
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