IEC 60502-4:2005
(Main)Power cables with extruded insulation and their accessories for rated voltages from 1 kV (Um = 1,2 kV) up to 30 kV (Um = 36 kV) - Part 4: Test requirements on accessories for cables with rated voltages from 6 kV (Um = 7,2 kV) up to 30 kV (Um = 36 kV)
Power cables with extruded insulation and their accessories for rated voltages from 1 kV (Um = 1,2 kV) up to 30 kV (Um = 36 kV) - Part 4: Test requirements on accessories for cables with rated voltages from 6 kV (Um = 7,2 kV) up to 30 kV (Um = 36 kV)
Specifies the test requirements for type testing of accessories for power cables with rated voltages from 3,6/6 (7,2) kV up to 18/30 (36) kV, complying with IEC 60502-2. Accessories for special applications, such as aerial cables, submarine or ship cables or hazardous situations (explosive environments, fire resistant cables or seismic conditions), are not included. Formerly, approvals of products now covered by this IEC standard have been achieved on the basis of national standards and specifications and/or the demonstration of satisfactory service performance. The publication of this IEC standard does not invalidate existing approvals. However, products approved according to these earlier standards or specifications cannot claim approval to this IEC standard unless specifically tested to it. It is not necessary to repeat these tests, once successfully completed, unless changes are made in the materials, design or manufacturing process which might affect the performance characteristics. Test methods are included in IEC 61442. Significant technical changes with respect to the previous edition are as follows: a) the scope clarifies the validation of former product approvals; b) definitions have been given for tracking, erosion and metallic housing, and substantial damage has been more detailed; c) the range of approval has been revised; d) test sequences have been simplified by removing initial heating cycles; e) additional information has been provided for testing separable connectors with a metallic housing; f) an examination has been added to all test sequences for information only.
Câbles d'énergie à isolant extrudé et leurs accessoires pour des tensions assignées de 1 kV (Um = 1,2 kV) à 30 kV (Um = 36 kV) - Partie 4: Exigences d'essai pour accessoires de câbles de tensions assignées de 6 kV (Um = 7,2 kV) à 30 kV (Um = 36 kV)
Définit les exigences d'essais de type des accessoires de câbles d'énergie de tensions assignées de 3,6/6 (7,2) kV à 18/30 (36) kV conformes à la CEI 60502-2. Les accessoires pour les câbles aériens, sous-marins ou de bord ou des applications spéciales telles que les situations à risque (environnements explosifs, câbles résistant au feu, ou conditions séismiques) ne sont pas couverts par cette norme. Antérieurement, les acceptations de produits couverts maintenant par cette norme CEI ont été acquises sur la base de normes et spécifications nationales et/ou la démonstration de performances satisfaisantes en service. La publication de cette norme ne rend pas caduques les acceptations existantes. Cependant, les produits acceptés selon les normes ou spécifications antérieures ne peuvent se prévaloir d'une acceptation selon la présente norme CEI que s'ils ont été essayés spécifiquement selon les modalités qui y sont indiquées. Il n'est pas nécessaire de répéter ces essais lorsqu'ils ont été effectués avec succès, sauf si des changements interviennent dans les matériaux, la constitution ou le procédé de fabrication, susceptibles d'affecter les caractéristiques de fonctionnement. Les méthodes d'essais figurent dans la CEI 61442. Les changements significatifs par rapport à l'édition précédente sont les suivants: a) le domaine d'application clarifie le statut des produits approuvés antérieurement; b) les définitions du cheminement, de l'érosion et du boîtier métallique ont été ajoutées et les détails de ce qu'on entend par dommage substantiel ont été développés; c) l'étendue de l'approbation a été revue; d) les séquences d'essai ont été simplifiées par la suppression des cycles thermiques initiaux; e) une information additionnelle a été apportée pour l'essai des connecteurs séparables comportant un boîtier métallique; f) un examen visuel a été ajouté à toutes les séquences d'essai, pour information seulement.
General Information
Relations
Standards Content (Sample)
IEC 60502-4
Edition 2.0 2005-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
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) –
m m
Part 4: Test requirements on accessories for cables with rated voltages
from 6 kV (U = 7,2 kV) up to 30 kV (U = 36 kV)
m m
Câbles d'énergie à isolant extrudé et leurs accessoires pour des tensions
assignées de 1 kV (U = 1,2 kV) à 30 kV (U = 36 kV) –
m m
Partie 4: Exigences d'essai pour accessoires de câbles de tensions assignées
de 6 kV (U = 7,2 kV) à 30 kV (U = 36 kV)
m m
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IEC 60502-4
Edition 2.0 2005-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
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) –
m m
Part 4: Test requirements on accessories for cables with rated voltages
from 6 kV (U = 7,2 kV) up to 30 kV (U = 36 kV)
m m
Câbles d'énergie à isolant extrudé et leurs accessoires pour des tensions
assignées de 1 kV (U = 1,2 kV) à 30 kV (U = 36 kV) –
m m
Partie 4: Exigences d'essai pour accessoires de câbles de tensions assignées
de 6 kV (U = 7,2 kV) à 30 kV (U = 36 kV)
m m
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
V
CODE PRIX
ICS 29.060.20 ISBN 2-8318-7852-7
– 2 – 60502-4 © IEC:2005
CONTENTS
FOREWORD.4
1 Scope.6
2 Normative references.6
3 Terms and definitions .7
4 Types of accessory.9
5 Voltage designations and maximum conductor temperatures.9
5.1 Rated voltages .9
5.2 Maximum conductor temperatures .9
6 Assembly of accessories to be tested.9
6.1 Identification.9
6.2 Installation and connections.10
7 Range of approval .11
8 Test sequences .12
9 Test results .13
9.1 Accessory failure .13
9.2 Cable failure .13
Annex A (informative) Identification of test cable (see 6.1.1).31
Figure 1 – Test arrangements and number of samples for terminations (see Table 4) .25
Figure 2 – Test arrangements and number of samples for straight or branch joints
(see Table 5) .
Figure 3 – Test arrangements and number of samples for stop ends (see Table 6) .27
Figure 4 – Test arrangements and number of samples for screened deadbreak
separable connectors (see Table 7).28
Figure 5 – Test arrangements and number of samples for unscreened deadbreak
separable connectors (see Table 8).29
Figure 6 – Test arrangements and number of samples for loadbreak separable
connectors (see Table 9).30
Table 1 – Conductor cross-sectional area for testing of separable connectors.10
Table 2 – Range of approval for cable insulation.12
Table 3 – Test sequences .12
Table 4 – Test sequences and requirements for terminations.14
Table 5 – Test sequences and requirements for straight or branch joints .15
Table 6 – Test sequence and requirements for stop ends .16
Table 7 – Test sequences and requirements for screened deadbreak separable
connectors .17
Table 8 – Test sequences and requirements for unscreened separable connectors
(excluding shrouded terminations).19
Table 9 – Test sequences and requirements for loadbreak separable connectors .20
60502-4 © IEC:2005 – 3 –
Table 10 – Additional tests for smallest and largest conductor cross-sectional areas
(see 7.1) .21
Table 11 – Additional tests for different types of cable insulation screen and approval
from round to shaped conductors (not applicable to stop ends, see 7.1 and 7.3) .22
Table 12 – Summary of tests.23
Table 13 – Summary of test voltages and requirements (see Clause 9).24
– 4 – 60502-4 © IEC:2005
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
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) –
m m
Part 4: Test requirements on accessories for cables with rated voltages
from 6 kV (U = 7,2 kV) up to 30 kV (U = 36 kV)
m m
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
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5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60502-4 has been prepared by IEC technical committee 20: Electric
cables.
This second edition cancels and replaces the first edition published in 1997 and constitutes a
technical revision.
Significant technical changes with respect to the previous edition are as follows:
a) the scope clarifies the validation of former product approvals;
b) definitions have been given for tracking, erosion and metallic housing, and substantial
damage has been more detailed;
60502-4 © IEC:2005 – 5 –
c) the range of approval has been revised;
d) test sequences have been simplified by removing initial heating cycles;
e) additional information has been provided for testing separable connectors with a metallic
housing;
f) an examination has been added to all test sequences for information only.
The text of this standard is based on the following documents:
FDIS Report on voting
20/743/FDIS 20/756/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
IEC 60502 consists of the following parts, under the general title Power cables with extruded
insulation and their accessories for rated voltages from 1 kV (U = 1,2 kV) up to 30 kV
m
(U = 36 kV):
m
Part 1: Cables for rated voltages of 1 kV (U = 1,2 kV) and 3 kV (U = 3,6 kV);
m m
Part 2: Cables for rated voltages from 6 kV (U = 7,2 kV) up to 30 kV (U = 36 kV);
m m
Part 3: Reserved;
Part 4: Test requirements on accessories for cables with rated voltages from 6 kV (U = 7,2 kV) up
m
to 30 kV (U = 36 kV).
m
The committee has decided that the contents of this publication will remain unchanged until the
maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
– 6 – 60502-4 © IEC:2005
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) –
m m
Part 4: Test requirements on accessories for cables with rated voltages
from 6 kV (U = 7,2 kV) up to 30 kV (U = 36 kV)
m m
1 Scope
This part of IEC 60502 specifies the test requirements for type testing of accessories for power
cables with rated voltages from 3,6/6 (7,2) kV up to 18/30 (36) kV, complying with IEC 60502-2.
Accessories for special applications, such as aerial cables, submarine or ship cables or
hazardous situations (explosive environments, fire resistant cables or seismic conditions), are
not included.
Formerly, approvals of products now covered by this IEC standard have been achieved on the
basis of national standards and specifications and/or the demonstration of satisfactory service
performance. The publication of this IEC standard does not invalidate existing approvals.
However, products approved according to these earlier standards or specifications cannot
claim approval to this IEC standard unless specifically tested to it.
It is not necessary to repeat these tests, once successfully completed, unless changes are
made in the materials, design or manufacturing process which might affect the performance
characteristics.
Test methods are included in IEC 61442.
2 Normative references
The following referenced documents are indispensable for the application of this document. For
dated references, only the edition cited applies. For undated references, the latest edition of
the referenced document (including amendments) applies.
IEC 60183:1984, Guide to the selection of high-voltage cables
IEC 60502-2:1998, 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
m m
from 6 kV (U = 7,2 kV) up to 30 kV (U = 36 kV)
m m
IEC 61442:1997, Electric cables – Test methods for accessories for power cables with rated
voltages from 6 kV (U = 7,2 kV) up to 30 kV (U = 36 kV)
m m
60502-4 © IEC:2005 – 7 –
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
connector
metallic device to connect cable conductors together
[IEV 461-17-03]
3.2
termination
device fitted to the end of a cable to ensure electrical connection with other parts of the system
and to maintain the insulation up to the point of connection
[IEV 461-10-01]
3.3
indoor termination
termination intended for use where it is not exposed to either solar radiation or weathering
3.4
outdoor termination
termination intended for use where it is exposed to either solar radiation or weathering or both
3.5
terminal box
air- or compound-filled box fully enclosing a termination
[IEV 461-10-03, modified]
3.6
shrouded termination
indoor termination with additional insulation at the bushing connection and used in an air-filled
terminal box
3.7
straight joint
accessory making a connection between two cables to form a continuous circuit
[IEV 461-11-01]
3.8
branch joint
accessory making a connection of a branch cable to a main cable
[IEV 461-11-07, modified]
3.9
transition joint
straight or branch joint making a connection between cables having different types of extruded
insulation
[IEV 461-11-04, modified]
___________
IEC 60050(461):1984, International Electrotechnical Vocabulary (IEV) – Chapter 461: Electric cables
– 8 – 60502-4 © IEC:2005
3.10
stop end
accessory providing a means of insulating the unconnected end of an energized cable
[IEV 461-10-07, modified]
3.11
separable connector
fully insulated termination permitting the connection and the disconnection of a cable to other
equipment
3.12
screened separable connector
separable connector which has a fully screened external surface
3.13
unscreened separable connector
separable connector which does not have an external screen
3.14
plug-in type separable connector
separable connector in which the electrical contact is made by a sliding device
3.15
bolted-type separable connector
separable connector in which the electrical contact is made by a bolted device
3.16
deadbreak connector
separable connector designed to be connected and disconnected on de-energized circuits only
3.17
loadbreak connector
separable connector designed to be connected and disconnected on energized circuits
3.18
range-taking accessory
accessory designed to take more than one cross-section of cable
3.19
tracking
irreversible degradation by formation of paths, which are conductive even under dry conditions,
starting and developing on the surface of an insulating material and which may occur on
surfaces in contact with air and also on the interfaces between different insulating materials
3.20
erosion
irreversible and non-conducting degradation of the surface of the insulator that occurs by loss
of material, and which may be uniform, localized or tree shaped
NOTE Shallow surface traces, commonly tree-shaped, may occur on terminations, after partial flashover. These
traces are acceptable as long as they are non-conductive. When they are conductive they are classed as tracking.
60502-4 © IEC:2005 – 9 –
3.21
metallic housing
metal enclosure in intimate contact with the outer screen of a separable connector and having
at least the same current carrying capacity to earth as the metallic screen of the cable with
which the separable connector is to be used
4 Types of accessory
The accessories covered by this standard are listed below:
– indoor and outdoor terminations of all designs, including terminal boxes;
– straight joints, branch joints and stop ends of all designs, suitable for use underground or in
air;
– screened or unscreened plug-in type or bolted-type separable connectors.
NOTE Transition joints connecting cables with extruded insulation to paper-insulated cables are not included in
*
the scope of this standard. The requirements for these accessories are dealt with in IEC 60055 .
5 Voltage designations and maximum conductor temperatures
5.1 Rated voltages
The rated voltages U /U (U ) of accessories considered in this standard are given in 4.1 of
0 m
IEC 60502-2.
For a given application, the rated voltage of an accessory shall be consistent with that of the
cable, and shall be suitable for the operating condition of the system in which they are used, in
accordance with the recommendations of IEC 60183.
5.2 Maximum conductor temperatures
The accessories shall be suitable for use on cables having the conductor temperatures
specified in 4.2 of IEC 60502-2 for normal operation.
The maximum conductor temperatures of the cables under short-circuit conditions are given in
Table 3 of IEC 60502-2.
6 Assembly of accessories to be tested
6.1 Identification
6.1.1 Cables used for testing shall comply with IEC 60502-2 and shall be of the same rated
voltage as the accessories to be tested.
It is recommended that cables be correctly identified as in Annex A.
___________
*
IEC 60055 (all parts), Paper-insulated metal-sheathed cables for rated voltages up to 18/30 kV (with copper or
aluminium conductors and excluding gas-pressure and oil-filled cables).
– 10 – 60502-4 © IEC:2005
6.1.2 Connectors used within the accessories shall be correctly identified with respect to
– assembly technique;
– tooling, dies and necessary setting;
– preparation of contact surfaces, if applicable;
– type, reference number and any other identification of the connector;
– details of the type test approval.
NOTE See IEC 61238-1: 2003, Compression and mechanical connectors for power cables for rated voltages up to
30 kV (U = 36 kV) – Part 1 : Test methods and requirements.
m
6.1.3 Accessories to be tested shall be correctly identified with respect to
– name of manufacturer;
– type, designation, manufacturing date or code;
– minimum and maximum cable cross-sections, material and shape of cable conductor;
– minimum and maximum cable insulation diameters;
– rated voltage (see 5.1);
– installation instructions (reference and date);
– inside dimensions or type of terminal box if applicable.
6.2 Installation and connections
6.2.1 Unless otherwise specified, the conductor cross-sectional area shall be as follows:
2 2 2
a) for terminations, joints and stop ends: 120 mm or 150 mm or 185 mm ;
b) for separable connectors: each rating shall be tested as indicated in Table 1, using either
aluminium or copper conductors.
Table 1 – Conductor cross-sectional area for testing of separable connectors
Conductor cross-sectional area
Rating
mm
A
Cu Al
200/250 50 70
400 95 150
600/630 185 300
800 300 400
1 250 500 630
NOTE 1 The current value should be sufficient to achieve the specified conductor
temperature (see 9.1 of IEC 61442).
NOTE 2 The use of these conductor cross-sectional areas may lead to overheating
of the bushing while achieving the required conductor temperature. Under these
circumstances, it is permissible to use a conductor cross-sectional area one size
smaller. If a bushing failure occurs, the test should be declared void (see 9.1).
6.2.2 Accessories shall be assembled in the manner specified by the manufacturer's
instructions, with the grade and quantity of materials supplied, including lubricants, if any.
60502-4 © IEC:2005 – 11 –
6.2.3 Accessories shall be dry and clean, but neither the cables nor the accessories shall be
subjected to any form of conditioning which might modify the electrical or thermal or
mechanical performance of the test assemblies.
NOTE Contact with chemicals, e.g. transformer oil, may affect the properties of the accessory and should be
avoided.
6.2.4 Unless otherwise specified, separable connectors shall be connected to their mating
bushing.
6.2.5 Where terminations or separable connectors are to be tested, the connection between
either lugs or bushings shall have the same electrical cross-sectional area as that of the cable
conductor.
6.2.6 For unscreened separable connectors, the minimum phase-to-phase and phase-to-earth
clearances, recommended by the manufacturer, shall be tested.
6.2.7 Where branch joints are to be tested, only the main cable shall carry the heating
current.
6.2.8 The main details regarding test mounting, especially supporting devices, shall be
recorded.
6.2.9 Test arrangements and number of samples are detailed in Figures 1 to 5.
7 Range of approval
2 2
7.1 Approval of a range of conductor cross-sectional areas from 95 mm to 300 mm of one
type of accessory for both range-taking and non-range-taking shall be obtained by successfully
completing the full range of type tests of this standard as listed in Tables 4 to 9, on a conductor
cross-sectional area as indicated in 6.2.1.
Extension of approval to a range wider than that given above shall be achieved by carrying out
the additional tests listed in Table 10 on the smallest and/or largest conductor cross-sectional
areas of the required range.
Approval of a range of conductor cross-sectional areas for a separable connector shall be
obtained by successfully completing the full range of type tests of this standard, as listed in
Tables 7 to 9, on a conductor cross-sectional area as indicated in Table 1 and in 6.2.1b). In
addition, the type tests listed in Table 10 shall be successfully completed on the smallest
and/or largest conductor cross-sectional areas in the range.
7.2 Approval is independent of the cable conductor material: tests may therefore be carried
out using cables with either aluminium or copper conductors.
7.3 Tests performed on accessories installed on cables having shaped conductors shall be
deemed to cover the same type of accessory when used on cables having circular conductors.
The converse will not apply.
In order to achieve extension of approval from round to sector-shaped conductors, additional
tests shall be performed according to Table 11. Stop ends shall be tested as in Table 6 using
half the number of samples in Figure 3.
7.4 Approval is dependent on the cable insulation tested as detailed in Table 2.
– 12 – 60502-4 © IEC:2005
Table 2 – Range of approval for cable insulation
Insulation of test cable Range of approval
XLPE XLPE, EPR, HEPR and PVC
EPR or HEPR EPR, HEPR and PVC
PVC PVC
7.5 The additional tests specified in Table 11 shall be carried out to achieve extension of
approval for different types of cable insulation screen. Stop ends shall be tested as in Table 6
using half the number of samples in Figure 3.
7.6 Approval obtained by testing on a non longitudinally water-blocked type of cable shall be
extended to a cable with means of longitudinal water-blocking in the metallic screen area but
otherwise of the same design. The converse shall not apply.
7.7 Tests performed on three-core accessories shall be deemed to cover single-core
accessories of the same design. The converse will not apply.
7.8 Approval of an accessory tested for a specified U shall extend to operation of the
accessory at a lower U .
8 Test sequences
The tests applicable to accessories shall be carried out in the sequences listed in the tables
and figures mentioned in Table 3.
Table 3 – Test sequences
Accessories Table Figure
Terminations 4 1
Straight or branch joints 5 2
Stop ends 6 3
Screened deadbreak separable connectors 7 4
Unscreened deadbreak separable connectors 8 5
Loadbreak separable connectors 9* 6*
Additional tests for smallest and largest conductor cross-sectional areas 10 –
Additional tests for different types of cable insulations screen and
approval from round to shaped conductors 11 –
* Under consideration.
NOTE In Tables 4 to 8, the symbols have the meaning given in IEC 61442, i.e.:
I short-circuit current (r.m.s. value) in the metallic screen;
sc
I short-circuit current (initial peak value) in the conductor;
d
θ maximum permissible short-circuit temperature of the cable conductor.
sc
Tests on terminations and joints may be combined, provided the sequences and requirements
are the same.
A summary of the tests required is given in Table 12. The test voltages and requirements are
summarized in Table 13.
60502-4 © IEC:2005 – 13 –
9 Test results
All test samples, tested as indicated in Clause 7 and Tables 4 to 11, shall meet the
requirements for all test sequences.
If any of the test samples do not meet the requirements, they shall be dismantled, inspected to
determine if 9.1 or 9.2 applies and the result of the inspection recorded.
9.1 Accessory failure
If an accessory fails to meet the requirements due to either installation or test procedure
errors, the test shall be declared void without discrediting the accessories.
The complete test sequence shall be repeated on a new set of samples.
If there is no evidence of such error, the type of accessory is not approved.
9.2 Cable failure
If a cable fails beyond any part of an accessory, the tests shall be declared void without
discrediting the accessories. Tests may be repeated using new accessories (start testing from
the beginning of the test sequence) or alternatively by repair of the cable (continue testing from
the point of break).
– 14 – 60502-4 © IEC:2005
Table 4 – Test sequences and requirements for terminations
1)
Tests Requirements Test methods Test sequences
of IEC 61442 (see Figure 1)
1.1 1.2 1.3 1.4 1.5
1 AC or d.c. voltage
AC for 5 min at 4,5 U or d.c. for Clause 4 or 5 x x x
15 min at 4 U
2)
AC (wet) 1 min at 4 U Clause 4 x
3)
2 Partial discharge 10 pC max. at 1,73 U Clause 7 x
4)
3 10 impulses of each polarity Clause 6 x
Impulse at θ
t
5) 4)
4 Heating cycles in air 60 cycles at θ and 2,5 U Subclauses 9.1 and 9.2 x
t 0
3)
5 Partial discharge 10 pC max. at 1,73 U Clause 7 x
4), 6)
at θ and ambient
t
temperature
8)
6 Thermal short-circuit Two short-circuits at I of the Clause 10 x x
sc
7)
(screen) cable screen.
No visible deterioration
8)
7 Thermal short-circuit Two short-circuits to raise Clause 11 x x
(conductor)
conductor to θ of the cable.
sc
No visible deterioration
8 Dynamic One short-circuit at I Clause 12 x
d
9)
short-circuit No visible deterioration
9 Impulse 10 impulses of each polarity Clause 6 x x x
10 AC voltage 15 min at 2,5 U Clause 4 x x x
10), 11)
11 Humidity 300 h at 1,25 U , see Table 13 Clause 13 x
2), 11)
12 Salt fog 1 000 h at 1,25 U , see Table 13 Clause 13 x
12)
13 Examination For information only – x x x x x
1)
Unless otherwise specified, tests shall be carried out at ambient temperature.
2)
For outdoor terminations only.
3)
Not required for accessories installed on 3,6/6 (7,2) kV cables having unscreened insulation.
4)
θ is the maximum cable conductor temperature in normal operation +5 K to 10 K.
t
5)
8 h total with ≥2 h steady and ≥3 h cooling.
6)
Measurement is made at the end of the heating period.
7)
This test is only required for terminations that are equipped with a connection to, or adaptor for, the metallic
screen of the cable.
8)
Thermal short-circuit may be combined with the dynamic short-circuit.
9)
Only required for single-core cable accessories designed for initial peak currents i > 80 kA and three-core
p
accessories designed for i > 63 kA . Value of I shall be declared by the manufacturer.
p d
10)
For indoor terminations only. Not required for compound-filled terminal boxes. Shrouded terminations shall be
tested in a three-phase condition.
11)
Not required for terminations having porcelain insulators.
12)
It is advised that the accessory is examined for signs of any of the following:
(i) cracking in the filling media and/or tape or tube components
and/or (ii) a moisture path across a primary seal
and/or (iii) corrosion and/or tracking and/or erosion which would, in time, lead to failure of the accessory
and/or (iv) leakage of any insulating material.
60502-4 © IEC:2005 – 15 –
Table 5 – Test sequences and requirements for straight or branch joints
1)
Tests Requirements Test methods Test
of IEC 61442 sequences
(see Figure 2)
2.1 2.2 2.3
1 AC or d.c. voltage AC for 5 min at 4,5 U or d.c. for Clause 4 or 5 x x x
15 min at 4 U
2), 3)
2 Partial discharge 10 pC max. at 1,73 U Clause 7 x
3), 4)
3 10 impulses of each polarity Clause 6 x
Impulse at θ
t
5) 3), 4)
4 Heating cycles in air Clause 9 x
30 cycles at θ and 2,5 U
t 0
5) 3), 4)
5 Heating cycles under 30 cycles at θ and 2,5 U Clause 9 x
t 0
water
2), 3)
6 Partial discharge at 10 pC max. at 1,73 U Clause 7 x
3), 4), 6)
θ and ambient
t
temperature
7)
7 Thermal short-circuit Two short-circuits at I of the cable Clause 10 x x
sc
3)
(screen) screen.
No visible deterioration
7)
8 Thermal short-circuit Clause 11 x x
Two short-circuits to raise conductor
3)
(conductor) to θ of the cable.
sc
No visible deterioration
9 Dynamic One short-circuit at I Clause 12 x
d
8)
short-circuit No visible deterioration
10 Impulse 10 impulses of each polarity Clause 6 x x x
11 AC voltage 15 min at 2,5 U Clause 4 x x x
9)
12 Examination For information only – x x x
1)
Unless otherwise specified, tests shall be carried out at ambient temperature.
2)
Not required for accessories installed on 3,6/6 (7,2) kV cables having unscreened insulation.
3)
For transition joints (extruded insulation to extruded insulation), the testing parameters are those for the lower
rated cable.
4)
θ is the maximum cable conductor temperature in normal operation +5 K to 10 K.
t
5)
8 h total with ≥2 h steady and ≥3 h cooling.
6)
Measurement is made at the end of the heating period.
7)
Thermal short-circuit may be combined with the dynamic short-circuit.
8)
Only required for single-core cable accessories designed for initial peak currents i > 80 kA and three-core
p
accessories designed for i > 63 kA. Value of I shall be declared by the manufacturer.
p d
9)
It is advised that the accessory is examined for signs of any of the following:
(i) cracking in the filling media and/or tape or tube components
and/or (ii) a moisture path across a primary seal
and/or (iii) corrosion and/or tracking and/or erosion which would, in time, lead to failure of the accessory
and/or (iv) leakage of any insulating material.
– 16 – 60502-4 © IEC:2005
Table 6 – Test sequence and requirements for stop ends
1)
Tests Requirements Test methods Test
of IEC 61442 sequence
(see Figure 3)
3.1
1 AC or d.c. voltage AC for 5 min at 4,5 U or d.c. for Clause 4 or 5 x
15 min at 4 U
2)
2 Partial discharge 10 pC max. at 1,73 U Clause 7 x
3 Impulse 10 impulses of each polarity Clause 6 x
4 AC voltage Clause 4 x
500 h at 2,5 U
2)
5 Partial discharge 10 pC max. at 1,73 U Clause 7 x
6 Impulse 10 impulses of each polarity Clause 6 x
7 AC voltage Clause 4 x
15 min at 2,5 U
3)
8 Examination For information only – x
1)
Unless otherwise specified, tests shall be carried out at ambient temperature.
2)
Not required for accessories installed on 3,6/6 (7,2) kV cables having unscreened insulation.
3)
It is advised that the accessory is examined for signs of any of the following:
(i) cracking in the filling media and/or tape or tube components
and/or (ii) a moisture path across a primary seal
and/or (iii) corrosion and/or tracking and/or erosion which would, in time, lead to failure of the accessory
and/or (iv) leakage of any insulating material.
60502-4 © IEC:2005 – 17 –
Table 7 – Test sequences and requirements for screened deadbreak separable connectors
1)
Tests Requirements Test methods Test sequences
of IEC 61442 (see Figure 4)
4.1 4.2 4.3 4.4
1 AC or d.c. voltage
AC for 5 min at 4,5 U or d.c. for Clause 4 or 5 x x x
15 min at 4 U
2)
2 Partial discharge 10 pC max. at 1,73 U Clause 7 x
3)
3 Impulse at θ 10 impulses of each polarity Clause 6 x
t
7)
4 Thermal short-circuit Clause 10 x x
Two short-circuits at I of
sc
6)
(screen) the cable screen.
No visible deterioration
5 Thermal short-circuit Two short-circuits to raise Clause 11 x x)
(conductor)
conductor to θ of the cable.
sc
No visible deterioration
6 Dynamic One short-circuit at I Clause 12 x
d
8)
short-circuit No visible deterioration
4) 3) 12)
7 Heating cycles in air Clause 9 x
30 cycles at θ and 2,5 U
t 0
4) 3) 12)
8 Heating cycles under Clause 9 x
30 cycles at θ and 2,5 U
t 0
water
9)
9 Disconnect/connect Five times. – x x x
No visible damage to contact
2)
10 Partial discharge at 10 pC max. at 1,73 U Clause 7 x
3), 5)
θ and ambient
t
temperature
11 Impulse 10 impulses of each polarity Clause 6 x x x
12 AC voltage 15 min at 2,5 U Clause 4 x x x
13 Operating eye Axial force 1 300 N for 1 min Clause 19 x
Torque 14 N·m
2)
14 Partial discharge Clause 7 x
10 pC max. at 1,73 U
13)
15 Examination For information only – x x x x
10)
16 Screen resistance Maximum 5 000 Ω Clause 15
17 Screen leakage Maximum 0,5 mA at U Clause 16
m
10)
current
10,11)
18 Fault current initiation See notes Clause 17 Tests 16 to 20
19 Operating force Force <900 N Clause 18 are carried out
20 Capacitive test point Capacitance of test point to cable Clause 20 on separate
conductor: samples.
C > 1,0 pF For tests 16 and 19,
tc
no cable is required.
Ratio of capacitance of test point
For tests 17, 18 and
to earth C and capacitance of test
te
point to cable conductor C : 20, appropriate cable
tc
lengths are to be
C /C ≤ 12,0
te tc used.
– 18 – 60502-4 © IEC:2005
1)
Unless otherwise specified, tests shall be carried out at ambient temperature.
2)
Not required for accessories installed on 3,6/6 (7,2) kV cables having unscreened insulation.
3)
θ is the maximum cable conductor temperature in normal operation +5 K to 10 K.
t
4)
8 h total with ≥2 h steady and ≥3 h cooling.
5)
Measurement is made at the end of the heating period.
6)
This test applies only to separable connectors that are equipped with a connection to, or adaptor for, the
metallic screen of the cable.
7)
Thermal short-circuit may be combined with the dynamic short-circuit.
8)
Only required for single-core cable accessories designed for initial peak currents i > 80 kA and three-core
p
accessories designed for i > 63 kA. Value of I shall be declared by the manufacturer.
p d
9)
The test shall be carried out only when the cable is de-energized.
10)
The test is required for separable connectors without a metallic housing or with a removable metallic housing.
The metallic housing shall be removed prior to the test. This test is not required for separable connectors
which can only be used in service with the metallic housing in position.
11)
For solidly earthed systems, the fault initiation shall occur within 3 s. For unearthed or impedance earthed
systems, the fault current shall flow continuously.
12)
Current, see Table 1.
13)
It is advised that the accessory is examined for signs of any of the following:
(i) cracking in the filling media and/or tape or tube components
and/or (ii) a moisture path across a primary seal
and/or (iii) corrosion and/or tracking and/or erosion which would, in time, lead to failure of the accessory
and/or (iv) leakage of any insulating material
60502-4 © IEC:2005 – 19 –
Table 8 – Test sequences and requirements for unscreened separable connectors
(excluding shrouded terminations)
1)
Tests Requirements Test methods Test sequences
of IEC 61442 (see Figure 5)
5.1 5.2 5.3 5.4
1 AC or d.c. voltage or d.c. for Clause 4 or 5 x x x
AC for 5 min at 4,5 U
15 min at 4 U
2)
2 Partial discharge 10 pC max. at 1,73 U Clause 7 x
3)
3 10 impulses of each polarity Clause 6 x
Impulse at θ
t
7)
4 Thermal short-circuit Two short-circuits at I of Clause 10 x x
sc
6)
(screen) the cable screen.
No visible deterioration
7)
5 Thermal short-circuit Two short-circuits to raise Clause 11 x x
(conductor)
conductor to θ of the cable.
sc
No visible deterioration
6 Dynamic Clause 12 x
One short-circuit at I
d
8)
short-circuit No visible deterioration
4) 3)
7 Heating cycles in air Clause 9 x
30 cycles at θ and 2,5 U
t 0
4) 3)
8 Heating cycles under 30 cycles at θ and 2,5 U Clause 9 x
t 0
water
9)
9 Disconnect/connect Five complete operations. – x x x
No visible damage to contact
2)
10 Partial discharge at 10 pC max. at 1,73 U Clause 7 x
3), 5)
θ and ambient
t
temperature
11 Impulse 10 impulses of each polarity Clause 6 x x x
12 AC voltage Clause 4 x x x
15 min at 2,5 U
10)
13 Humidity 300 h at 1,25 U , see Table 13 Clause 13 x
...
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