Cenelec Spec Hd629-1
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HARMONIZATION DOCUMENT
HD 629.1 S2
DOCUMENT D'HARMONISATION HARMONISIERUNGSDOKUMENT
February 2006
ICS 29.060.20
Supersedes HD 629.1 S1:1996 + A1:2001
English version
Test requirements on accessories for use on power cables of rated voltage from 3,6/6(7,2) kV up to 20,8/36(42) kV Part 1: Cables with extruded insulation
Prescriptions relatives aux essais sur les accessoires des câbles d'énergie pour des tensions assignées de 3,6/6(7,2) kV à 20,8/36(42) kV Partie 1: Câbles à isolation extrudée
Prüfanforderungen für Kabelgarnituren für Starkstromkabel mit einer Nennspannung von 3,6/6(7,2) kV bis 20,8/36(42) kV Teil 1: Kabel mit extrudierter Kunststoffisolierung
This Harmonization Document was approved by CENELEC on 2005-09-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for implementation of this Harmonization Document at national level. Up-to-date lists and bibliographical references concerning such national implementations 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, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the 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 © 2006 CENELEC -
All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. HD 629.1 S2:2006 E
HD 629.1 S2:2006
–2–
Foreword This Harmonization Document was prepared by the Technical Committee CENELEC TC 20, Electric cables. The text of the draft was submitted to the formal vote and was approved by CENELEC as HD 629.1 S2 on 2005-09-01. This Harmonization Document supersedes HD 629.1 S1:1996 and its amendment A1:2001; it also includes the changes proposed by CLC/TC 20 WG 11 as draft amendment A2. The following dates were fixed: –
–
–
latest date by which the existence of the HD has to be announced at national level
(doa)
2006-03-01
latest date by which the HD has to be implemented at national level by publication of a harmonized national standard or by endorsement
(dop)
2006-09-01
latest date by which the national standards conflicting with the HD have to be withdrawn
(dow)
2008-09-01
This Harmonization Document has been written as part of a series of standards to satisfy the Public Procurement Directive, and is complementary to HD 620, which covers extruded insulation power cables from 3,6/6(7,2) kV to 20,8/36(42) kV, inclusive. This standard defines the requirements, which may be called up for joints, stop ends, separable connectors, indoor and outdoor terminations when used with extruded insulation power cables covered by HD 620. The equivalent requirements for paper-insulated power cables are given in HD 629.2 S2. The test methods for these accessories are given in EN 61442. __________
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HD 629.1 S2:2006
Contents Page 1
Scope .............................................................................................................................. 4
2
Normative references ....................................................................................................... 5
3
Definitions ........................................................................................................................ 5
4
Components..................................................................................................................... 7
5
Test assemblies ............................................................................................................... 7
6
Range of compliance ........................................................................................................ 9
7
Test sequences .............................................................................................................. 10
8
Test results .................................................................................................................... 11
Annex A (informative) Identification of test cable ................................................................. 27 Bibliography.......................................................................................................................... 28 Tables Table 1 – Test cable cross-sections for separable connectors ................................................. 9 Table 2 – Range of insulation compliance ............................................................................. 10 Table 3 – Indoor terminations for extruded insulation cables (including shrouded terminations) ......................................................................................... 12 Table 4 – Outdoor terminations for extruded insulation cables ............................................... 13 Table 5 – Joints for extruded insulation cables ...................................................................... 14 Table 6 – Stop ends for extruded insulation cables................................................................ 15 Table 7 – Screened separable connectors for extruded insulation cables............................... 16 Table 8 – Unscreened separable connectors (excluding shrouded terminations) for extruded insulation cables ............................................................................................... 18 Table 9 – Additional tests for non-circular conductor profile and/or insulation screen compliance ........................................................................................................................... 19 Table 10 – Additional tests for smallest and largest cable cross section compliance .............. 20 Table 11 – Summary of test voltages .................................................................................... 21 Figures Figure 1 – Test arrangements for terminations ...................................................................... 22 Figure 2 - Test arrangements for joints ................................................................................. 23 Figure 3 – Test arrangements for stop ends .......................................................................... 24 Figure 4 – Test arrangements for screened separable connectors ......................................... 25 Figure 5 – Test arrangement for unscreened separable connectors ....................................... 26
HD 629.1 S2:2006
1 1.1
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Scope General
This standard specifies performance requirements for type tests for cable accessories for use on extruded insulation power cables as specified in HD 620. Formerly, approvals of such products have been achieved on the basis of national standards and specifications and/or the demonstration of satisfactory service performance. The publication of this CENELEC standard does not invalidate existing approvals. However, products approved to such earlier standards or specifications shall not claim approval to this CENELEC 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. Accessories for special applications such as submarine cables, ships cables or hazardous situations (explosive environments, fire resistant cables or seismic conditions) are not included. Test methods are included in EN 61442. 1.2
Type of accessories
The accessories covered by this standard are listed below: a) indoor and outdoor terminations of all designs, including terminal boxes; b) straight joints, branch joints and stop ends of all designs, suitable for use underground or in air; c) screened or unscreened plug-in type or bolted-type separable connectors capable of interfacing with bushing profiles as specified in EN 50180 and EN 50181. NOTE Joints connecting extruded insulation cables (HD 620) to paper insulated cables (HD 621) are not included. The requirements for these accessories are dealt with in HD 629.2.
1.3
Rated voltage
The rated voltages U o /U (U m ) of the accessories covered by this standard are 3,6/6(7,2) - 3,8/6,6(7,2) - 6/10(12) - 6,35/11(12) - 8,7/15(17,5) - 12/20(24) - 12,7/22(24) - 18/30(36) - 19/33(36) 20,8/36(42) kV where: U o is the rated power-frequency voltage between conductor and earth or metallic screen, for which the cable accessory is designed; U is the rated power-frequency voltage between conductors for which the cable accessory is designed; U m is the maximum value of the 'highest system voltage' for which the cable accessory is designed. 1.4
Current
The continuous current rating of a termination or joint for extruded insulation power cables shall be in accordance with the appropriate cable specified in HD 620 and shall be suitable for operation at the rated current and under short circuit fault conditions at the temperatures stated therein. The current rating of a separable connector is governed by the current rating of the mating bushing (see EN 50180 and EN 50181).
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2
HD 629.1 S2:2006
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 any amendments) applies. EN 50180
Bushings above 1 kV up to 36 kV and from 250 A to 3,15 kA for liquid filled transformers
EN 50181
Plug-in type bushings above 1 kV up to 36 kV and from 250 A to 1,25 kA for equipment other than liquid filled transformers
EN 61238-1
Compression and mechanical connectors for power cables for rated voltages up to 36 kV (U m = 42 kV) – Part 1: Test methods and requirements (IEC 61238-1:2003, mod.)
EN 61442
Test methods for accessories for power cables with rated voltages from 6 kV (U m = 7,2 kV) up to 36 kV (U m = 42 kV) (IEC 61442)
HD 428.2.2
Three-phase oil-immersed distribution transformers 50 Hz, from 50 to 2 500 kVA with highest voltage for equipment not exceeding 36 kV – Part 2: Distribution transformers with cable boxes on the high-voltage and/or low-voltage side – Section 2: Cable boxes type 1 for use on distribution transformers meeting the requirements of HD 428.2.1 S1
HD 620
Distribution cables with extruded insulation for rated voltages from 3,6/6 (7,2) kV to 20,8/36 (42) kV
HD 631 (series) 1) Electrical cables - Accessories - Material characterisation IEC 60050-461
3
International Electrotechnical Vocabulary - Chapter 461: Electric cables
Definitions
For the purposes of this document, the following terms and definitions apply together with those given in IEC 60050-461. 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 ——————— 1) At draft stage.
HD 629.1 S2:2006
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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 joint accessory suitable for use in air or underground which makes a connection between two or more insulated power cables to form a continuous circuit 3.7.1 type I joint joint suitable for use where impact resistance withstand is not required 3.7.2 type II joint joint which has impact resistance withstand in accordance with this standard 3.8 straight joint accessory making a connection between two cables to form a continuous circuit (IEV 461-11-01) NOTE For types of joint see 3.7.1 and 3.7.2.
3.9 branch joint accessory making a connection of a branch cable to a main cable (IEV 461-11-17) NOTE For types of joint see 3.7.1 and 3.7.2.
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
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HD 629.1 S2:2006
3.16 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 3.17 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.
3.18 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
Components
4.1
Connectors
Connectors used within the accessory shall comply with EN 61238-1 where applicable, or with another relevant standard or specification. 4.2
Materials
It is not a pre-requirement for compliance with this performance standard but, if component material characterization is required, the relevant part of HD 631 shall be used.
5
Test assemblies
5.1
Identification
5.1.1
Cables
The cables used for testing shall comply with HD 620. It is recommended that the test cables be correctly identified as in Annex A. 5.1.2
Connectors
Connectors used within the accessories shall be identified by the specification with which they comply. 5.1.3
Accessories
Accessories to be tested shall be correctly identified with respect to •
name of manufacturer,
•
type, designation, manufacturing date or code,
•
minimum and maximum cross-sections, material and shape of cable conductor,
•
minimum and maximum cable insulation diameters,
•
connector type(s),
•
rated voltage (see 1.3),
•
installation instructions (reference and date),
•
list of kit contents.
HD 629.1 S2:2006
5.2
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Cable conductor cross-section
Unless otherwise specified, the conductor cross-section shall be •
for terminations, joints or stop ends; 120 mm² or 150 mm² or 185 mm²,
•
for separable connectors, as indicated in Table 1 for each rating, using either aluminium or copper conductors.
5.3
Assembly
Accessories shall be assembled in the manner specified in the manufacturer's instructions, with the grade and quantity of materials supplied. A joint designed for crossed cores shall be so assembled. 5.4
Terminations
Terminations shall be tested using the arrangement and with the number of samples detailed in Figure 1. 5.5
Terminal boxes
A termination intended to be used in a metallic terminal box shall normally be tested in the specified 2) terminal box, which shall conform to the relevant standards . For practical reasons, it is permissible to carry out the tests with the terminations enclosed in a test terminal box fabricated from rigid metallic mesh or from insulating material lined with metal foil. The box shall allow humidity ingress. The test terminal box shall be of the same shape and dimensions (e.g. creepage lengths and clearances) as the specified terminal box and be provided with conductor terminals and bushings of the type used in service. When only one of the termination samples is required to be tested in the terminal box (see 6.8), the remote end of the test cable may be terminated by any suitable means. 5.6
Joints and stop ends
Joints and stop ends shall normally be designed and tested to withstand a height of water of 1 m (10 kPa (0,1 bar)). For special applications and in situations subject to a high water table or prone to flooding, this height of water may be insufficient to ensure the satisfactory performance of the moisture seals. In such cases, upon agreement between manufacturer and user, the accessories shall be tested using an increased water height of 20 m (200 kPa (2,0 bar)). The chosen water height shall be recorded in the test report. Testing at one water height will achieve compliance for that pressure only. Testing at both 1 m and 20 m water heights will achieve compliance for those water heights and all intermediate pressures. Where a branch joint is being tested, only the main cable shall carry heating current.
——————— 2)
For example HD 428.2.2.
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5.7
HD 629.1 S2:2006
Separable connectors
The conductor cross-section of the test cable shall be as defined in Table 1. Tests on separable connectors shall be performed with the separable connector installed on its mating bushing. Unscreened separable connectors shall be tested at the minimum phase-to-phase and phase-to-earth clearances recommended by the manufacturer. Table 1 – Test cable conductor cross-sections for separable connectors Rating of separable connector
Cable conductor cross-section mm² Cu
Al
250 A
50
70
400 A
95
150
630 A
185
300
800 A
300
400
1 250 A
500
630
NOTE 1 The current value shall be sufficient to achieve the specified temperature of the cable conductor (see EN 61442, Subclause 9.1). NOTE 2 The use of the cross-sections in Table 1 may lead to overheating of the bushing while achieving the required conductor temperature. Under these circumstances, it is permissible to use a conductor one size smaller. If bushing failure occurs, the test will be declared void (see 8.3).
5.8
Test arrangements and number of samples
These are detailed in Figures 1 to 5.
6
Range of compliance
6.1 Compliance for one type of accessory for the range of cable conductor cross-sections from 95 mm² to 300 mm² shall be obtained by successfully completing all the appropriate tests of Tables 3 to 8 of this standard on the conductor cross-sections specified in 5.2. Extension of this compliance for the same type of accessory on larger or smaller conductor crosssections may be obtained by satisfactory completion of the additional test sequence in Table 10, on the appropriate cross-section. 6.2 For compliance of an accessory for conductor cross-sections outside this range the crosssection to be tested shall be subject to agreement between interested parties. 6.3 Compliance is independent of the cable conductor material; tests may be carried out with either aluminium or copper conductors. 6.4 Compliance for accessories tested on cables with shaped conductors shall cover the same type of accessory when used on cables with circular conductors. If compliance has been obtained using circular conductors, extension to shaped conductors may be obtained by satisfactory completion of the test sequence in Table 9.
HD 629.1 S2:2006
6.5
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Compliance is dependent on the cable insulation as detailed in Table 2. Table 2 – Range of insulation compliance Test cable insulation
Range of compliance
XLPE
XLPE, HEPR, EPR, PVC
EPR or HEPR
EPR, HEPR, PVC
6.6 Compliance for accessories tested on cables with one type of insulation screen may be extended to another type of insulation screen by satisfactory completion of the test sequence in Table 9. 6.7 Compliance obtained by testing on a cable without longitudinal water-blocking in the metallic screen area 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. 6.8 Compliance obtained for a three-core accessory shall extend to a single-core accessory of the same design. The converse shall not apply. 6.9 Compliance for a particular design of termination in a specified terminal box shall be obtained by the satisfactory completion of the test sequence in Table 3. If compliance has already been obtained for a termination design separate from the terminal box, it is necessary to carry out the test sequence with only one of the terminations in a terminal box. Satisfactory completion of the appropriate tests of Table 3 for a termination for one design of terminal box may allow the compliance to be extended to that termination in another terminal box design by comparison of the detail drawings of the boxes. If there are differences in the design and/or dimensions, the impulse voltage test at ambient temperature shall be repeated, by agreement between the manufacturer and the customer. 6.10 Compliance of an accessory tested for a specified U o shall extend to operation of the accessory at a lower U o .
7
Test sequences
The test sequences for the various types of accessory are detailed in Tables 3 to 8, with additional tests in Tables 9 and 10. The test voltages are summarized in Table 11. NOTE During the heating cycle voltage test, the manufacturer, at his own discretion, may carry out partial discharge tests at any time, for information only.
7.1
Dynamic short circuit performance
This test is a three-phase test required for single-core cable accessories designed for initial peak current higher than 80 kA and for three-core cable accessories designed for initial peak current higher than 63 kA. Class 1
Three core accessories designed for initial peak currents above 63 kA up to and including 80 kA. The test current shall be 80 kA initial peak.
Class 2
Three core and single core accessories designed for initial peak currents above 80 kA up to and including 100 kA. The test current shall be 100 kA initial peak.
Class 3
Three core and single core accessories designed for initial peak currents above 100 kA up to and including 125 kA. The test current shall be 125 kA initial peak.
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8
HD 629.1 S2:2006
Test results
8.1
General
All test samples shall meet the requirements of the relevant test sequence. The examination at the end of a test sequence is for information only, but the results shall be recorded in the test report. 8.2
Test reports
Written reports on type tests proving compliance with this standard shall be made available to the customer. The details of the test arrangements, the sequence of tests and details of the accessory tested including, for example, cross-section of conductors, type of conductor connectors, minimum clearance between conductors or connection points and shell, shall be given in the report. The test reports shall be signed by a representative of the body carrying out the tests. This may be the manufacturer or a recognized certification body. 8.3
Failures
If any of the samples does not meet the requirements, it shall be dismantled and inspected to establish the cause of failure. There is no requirement for details of such failures to be recorded in a test report. If the failure is as detailed in 8.3.1, 8.3.2 or 8.3.3 the test sequence may be repeated as stated. If there is no evidence of error or failure as detailed in 8.3.1, 8.3.2 or 8.3.3 the type of accessory is not approved. 8.3.1
Installation or procedure errors
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 accessory. The complete test sequence may be repeated on a new set of samples. 8.3.2
Bushing failure
If a bushing failure occurs, the test shall be declared void without discrediting the accessory. Tests may be repeated using new bushings, starting from the beginning of the test sequence. 8.3.3
Cable failure
If a cable fails beyond any part of the accessory, the test shall be declared void without discrediting the accessory. Tests may be repeated using new accessories, starting from the beginning of the test sequence or, alternatively, by repairing the cable and continuing the test sequence from the point of break.
HD 629.1 S2:2006
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Table 3 – Indoor terminations for extruded insulation cables (including shrouded terminations) (see Figure 1) Test
Test clause of EN 61442
Test sequence
A1
A2
Test requirements
A3
1
DC voltage dry
5
x
x
15 min at 6 Uo, no breakdown nor flashover
2
AC voltage dry
4
x
x
5 min at 4,5 Uo, no breakdown nor flashover
3
Partial discharge at ambient temperature
7
x
max. 10 pC at 1,73 Uo (4)
4
Impulse voltage at elevated temperature
6
x
10 impulses of each polarity, no breakdown nor flashover
5
Heating cycle voltage in air
9
x
126 cycles at 2,5 Uo, no breakdown nor flashover
6
Partial discharge at elevated and ambient temperature
7
x
max. 10 pC at 1,73 Uo (4)
7
Thermal short circuit (screen) (1)
10
x
2 short circuits at Isc, no breakdown
8
Thermal short circuit (conductor)
11
x
2 short circuits to raise conductor to θsc of the cable, no breakdown
9
Dynamic short circuit
12
x
1 short circuit at Id (3), no breakdown
10
Impulse voltage at ambient temperature
6
x
x
10 impulses of each polarity, no breakdown nor flashover
11
AC voltage dry
4
x
x
15 min at 2,5 Uo, no breakdown nor flashover
12
Humidity (2)
13
13
Examination
-
x
x
x
300 h duration at 1,25 Uo
x
For information only (6)
(5)
(1)
This test is only required for accessories that are equipped with a connection to, or adaptor for, the metallic screen of the cable.
(2)
Not required for terminations with porcelain insulators.
(3)
For the value of the current I d , see 7.1.
(4)
If the relevant cable specification uses a level > 1,73 U o the test voltage shall be 2 U o with a maximum of 10 pC . Compliance at 2 U o also gives compliance at 1,73 Uo.
(5)
No breakdown nor flashover, no more than 3 trips, no substantial damage. It is considered that a substantial damage has occurred when it is evident that the performance of the accessory has been severely reduced by:
(6)
(i)
loss of dielectric quality due to tracking;
and/or
(ii)
erosion to a depth of 2 mm or 50 %, whichever is the smaller, of the wall thickness of the insulating material as applied;
and/or
(iii)
splitting of the material;
and/or
(iv)
puncture of the material.
The accessories shall be examined and the following information included in the test report: (i)
cracking in the filling media and/or tape or tube components;
and/or
(ii)
a moisture path bridging 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.
NOTE Refer to Clause 8 of EN 61442 for details of the calibration of conductor heating current required to have been carried out before the commencement of these tests.
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HD 629.1 S2:2006
Table 4 – Outdoor terminations for extruded insulation cables (see Figure 1) Test
Test clause of
Test sequence
EN 61442
A1
A2
Test requirements
A3
1
DC voltage dry
5
x
x
15 min at 6 Uo, no breakdown nor flashover
2
AC voltage dry
4
x
x
5 min at 4,5 Uo, no breakdown nor flashover
3
AC voltage wet
4
x
1 min at 4 Uo, no breakdown nor flashover
4
Partial discharge at ambient temperature
7
x
max. 10 pC at 1,73 Uo (4)
5
Impulse voltage at elevated temperature
6
x
10 impulses of each polarity, no breakdown nor flashover
6
Heating cycle voltage in air
9
x
126 cycles at 2,5 Uo, no breakdown
7
Immersion
9.4
x
10 cycles
8
Partial discharge at elevated and ambient temperature
7
x
max. 10 pC at 1,73 Uo (4)
9
Thermal short circuit (screen) (1)
10
x
2 short circuits at Isc, no breakdown
10
Thermal short circuit (conductor)
11
x
2 short circuits to raise conductor to θsc of the cable, no breakdown
11
Dynamic short circuit
12
x
1 short circuit at Id (3), no breakdown
12
Impulse voltage at ambient temperature
6
x
x
10 impulses of each polarity, no breakdown nor flashover
13
AC voltage dry
4
x
x
15 min at 2,5 Uo, no breakdown nor flashover
(2)
14
Salt fog
15
Examination
(1)
13 -
x
x
x
1 000 h duration at 1,25 Uo (5)
x
For information only (6)
This test is only required for accessories that are equipped with a connection to, or adaptor for, the metallic screen of the cable.
(2)
Not required for terminations with porcelain insulators.
(3)
For the value of the current I d , see 7.1.
(4)
If the relevant cable specification uses a level > 1,73 U o the test voltage shall be 2 U o with a maximum of 10 pC. Compliance at 2 U o also gives compliance at 1,73 Uo.
(5)
No breakdown nor flashover, no more than 3 trips, no substantial damage. It is considered that a substantial damage has occurred when it is evident that the performance of the accessory has been severely reduced by:
(6)
(i)
loss of dielectric quality due to tracking;
and/or
(ii)
erosion to a depth of 2 mm or 50 %, whichever is the smaller, of the wall thickness of the insulating material as applied;
and/or
(iii)
splitting of the material;
and/or
(iv)
puncture of the material.
The accessories shall be examined and the following information included in the test report: (i)
cracking in the filling media and/or tape or tube components;
and/or
(ii)
a moisture path bridging 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.
NOTE Refer to Clause 8 of EN 61442 for details of the calibration of conductor heating current required to have been carried out before the commencement of these tests.
HD 629.1 S2:2006
– 14 – Table 5 – Joints for extruded insulation cables (see Figure 2)
Test
Test clause of
Test requirements
Test sequences Type of joints
(1)
EN 61442
I B1
II B1
I-II B2
1
DC voltage dry
5
x
x
x
15 min at 6 Uo, no breakdown
2
AC voltage dry
4
x
x
x
5 min at 4,5 Uo, no breakdown
3
Partial discharge at ambient temperature
7
x
x
max. 10 pC at 1,73 Uo (4)
4
Impact at ambient temperature
14
x
Insulation resistance - Conductor to screen 10³ MΩ minimum - Screen to water 50 MΩ minimum
5
Impulse voltage at elevated temperature
6
x
x
10 impulses of each polarity, no breakdown
6
Heating cycle voltage in air
9
x
x
63 cycles at 2,5 Uo, no breakdown
7
Heating cycle voltage in water
9
x
x
63 cycles at 2,5 Uo, no breakdown
8
Partial discharge at elevated and ambient temperature
7
x
x
max. 10 pC at 1,73 Uo (4)
9
Thermal short circuit (screen) (2)
10
x
2 short circuits at Isc,, no breakdown
10
Thermal short circuit (conductor)
11
x
2 short circuits to raise conductor to θsc of the cable, no breakdown
11
Dynamic short circuit
12
x
1 short circuit at Id (3), no breakdown
12
Impulse voltage at ambient temperature
6
x
x
x
10 impulses of each polarity, no breakdown
13
AC voltage dry
4
x
x
x
15 min at 2,5 Uo, no breakdown
14
Examination
-
x
x
x
For information only (5)
(1)
Type I: Type test without impact test; Type II: Type test with impact test at ambient temperature.
(2)
This test is only required for accessories that are equipped with a connection to, or adaptor for the metallic screen of the cable.
(3)
For the value of the current Id, see 7.1.
(4)
If the relevant cable specification uses a level > 1,73 Uo the test voltage shall be 2 Uo with a maximum of 10 pC. Compliance at 2 Uo also gives compliance at 1,73 Uo.
(5)
The accessories shall be examined and the following information included in the test report: (i)
cracking in the filling media and/or tape or tube components;
(ii)
a moisture path bridging 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.
and/or
NOTE Refer to Clause 8 of EN 61442 for details of the calibration of conductor heating current required to have been carried out before the commencement of these tests.
– 15 –
HD 629.1 S2:2006
Table 6 – Stop ends for extruded insulation cables (see Figure 3) Test
Test clause of
Test sequence
EN 61442
C1
Test requirements
1
DC voltage dry
5
x
15 min at 6 Uo, no breakdown
2
AC voltage dry
4
x
5 min at 4,5 Uo, no breakdown
3
Partial discharge at ambient temperature
7
x
max. 10 pC at 1,73 Uo (1)
4
Impulse voltage at ambient temperature
6
x
10 impulses of each polarity, no breakdown
5
AC voltage in air
4
x
500 h at 2,5 Uo, no breakdown
6
AC voltage in water
4
x
500 h at 2,5 Uo, no breakdown
7
Partial discharge at ambient temperature
7
x
max. 10 pC at 1,73 Uo (1)
8
Impulse voltage at ambient temperature
6
x
10 impulses of each polarity, no breakdown
9
AC voltage dry
4
x
15 min at 2,5 Uo, no breakdown
Examination
-
x
For information only (2)
10 (1)
If the relevant cable specification uses a level >1,73 U o the test voltage shall be 2 U o with a maximum of 10 pC . Compliance at 2 U o also gives compliance at 1,73 Uo.
(2)
The accessories shall be examined and the following information included in the test report: (i)
cracking in the filling media and/or tape or tube components;
(ii)
a moisture path bridging 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.
and/or
HD 629.1 S2:2006
– 16 –
Table 7 – Screened separable connectors for extruded insulation cables (see Figure 4) Test
Test clause of
Test sequence
EN 61442
D1
D2
Test requirements
D3
1
DC voltage dry
5
x
x
15 min at 6 Uo , no breakdown
2
AC voltage dry
4
x
x
5 min at 4,5 Uo, no breakdown
3
Partial discharge at ambient temperature
7
x
max. 10 pC at 1,73 Uo (5)
4
Impulse voltage at elevated temperature
6
x
10 impulses of each polarity, no breakdown
5
Heating cycle voltage in air
9
x
63 cycles at 2,5 Uo, no breakdown
6
Heating cycle voltage in water
9
x
63 cycles at 2,5 Uo, no breakdown
7
Thermal short circuit (screen)
8 9
(1)
10
x
2 short circuits at Isc, no breakdown
Thermal short circuit (conductor)
11
x
2 short circuits to raise conductor to θsc of the cable, no breakdown
Dynamic short circuit
12
x
1 short circuit at Id (4), no breakdown
x
5 complete operations, no visible damage to contact
10
Disconnection/connection (2)
-
x
11
Partial discharge at elevated and ambient temperature
7
x
12
Impulse voltage at ambient temperature
6
x
x
10 impulses of each polarity, no breakdown
13
AC voltage dry
4
x
x
15 min at 2,5 Uo, no breakdown
14
Operating eye
19
x
Axial force: 1 300 N for 1 min Torque: 14 N . m
15
Partial discharge at ambient temperature
7
x
max. 10 pC at 1,73 Uo (5)
16
Examination
-
x
For information only (6)
17
Screen resistance measurement (3)
18
Leakage current measurement
19
Screen fault current initiation
(3)
15 16 17
20
Operating force
18
21
Capacitive test point performance
20
x
max. 10 pC at 1,73 Uo (5)
x
Tests 17 to 21 are carried out on separate samples
max. 5 000 Ω
For tests 17 and 20, no cable is required.
Solidly earthed system: - fault initiation to occur within 3 s Unearthed/impedance earthed system: - fault current to flow continuously
For tests 18, 19 and 21 appropriate cable lengths shall be used.
max. 0,5 mA at Um
Force less than 900 N Capacitance of test point to cable conductor Ctc > 1,0 pF Ratio of capacitance of test point to earth Cte and capacitance of test point to cable conductor Ctc: Cte/Ctc ≤ 12
– 17 –
HD 629.1 S2:2006
Table 7 – Screened separable connectors for extruded insulation cables (continued) Test
Test clause of EN 61442
Test sequence D1
D2
Test requirements
D3
(1)
This test is only required for accessories that are equipped with a connection to, or adaptor for, the metallic screen of the cable.
(2)
The test shall be carried out only when the cable is de-energized.
(3)
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.
(4)
For the value of the current Id, see 7.1.
(5)
If the relevant cable specification uses a level > 1,73 Uo the test voltage is 2 Uo with a maximum of 10 pC. Compliance at 2 Uo also gives compliance at 1,73 Uo.
(6)
The accessories shall be examined and the following information included in the test report: (i)
cracking in the filling media and/or tape or tube components;
and/or
(ii)
a moisture path bridging 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.
NOTE Refer to Clause 8 of EN 61442 for details of the calibration of conductor heating current required to have been carried out before the commencement of these tests.
HD 629.1 S2:2006
– 18 –
Table 8 – Unscreened separable connectors (excluding shrouded terminations) for extruded insulation cables (see Figure 5) Test
Test clause of
Test sequence
EN 61442
E1
E2
Test requirements
E3
1
DC voltage dry
5
x
x
15 min at 6 Uo, no breakdown
2
AC voltage dry
4
x
x
5 min at 4,5 Uo, no breakdown
3
Partial discharge at ambient temperature
7
x
max. 10 pC at 1,73 Uo (4)
4
Impulse voltage at elevated temperature
6
x
10 impulses of each polarity, no breakdown
5
Heating cycle voltage in air
9
x
63 cycles at 2,5 Uo, no breakdown
6
Heating cycle voltage in water
9
x
63 cycles at 2,5 Uo, no breakdown
7
Thermal short circuit (screen)
8 9
(1)
10
x
2 short circuits at Isc, no breakdown
Thermal short circuit (conductor)
11
x
2 short circuits to raise conductor to θsc of the cable, no breakdown
Dynamic short circuit
12
x
1 short circuit at Id (3),no breakdown
x
5 complete operations, no visible damage to contact
10
Disconnection/connection (2)
-
x
11
Partial discharge at elevated and ambient temperature
7
x
12
Impulse voltage at ambient temperature
6
x
x
10 impulses of each polarity, no breakdown
13
AC voltage dry
4
x
x
15 min at 2,5 Uo,no breakdown
14
Humidity
13
15
Examination
-
x
max. 10 pC at 1,73 Uo (4)
x
x
300 h duration at 1,25 Uo (5)
x
For information only(6)
(1)
This test is only required for accessories that are equipped with a connection to, or adaptor for, the metallic screen of the cable.
(2)
The test shall be carried out only when the cable is de-energized.
(3)
For the value of the current I d , see 7.1.
(4)
If the relevant cable specification uses a level > 1,73 U o the test voltage shall be 2 U o with a maximum of 10 pC. Compliance at 2 U o also gives compliance at 1,73 Uo.
(5)
No breakdown, no more than 3 trips, no substantial damage. It is considered that a substantial damage has occurred when it is evident that the performance of the accessory has been severely reduced by :
(6)
(i)
loss of dielectric quality due to tracking;
and/or
(ii)
erosion to a depth of 2 mm or 50 %, whichever is the smaller, of the wall thickness of the insulating material as applied;
and/or
(iii)
splitting of the material;
and/or
(iv)
puncture of the material.
The accessories shall be examined and the following information included in the test report: (i)
cracking in the filling media and/or tape or tube components;
and/or
(ii)
a moisture path bridging 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.
NOTE Refer to Clause 8 of EN 61442 for details of the calibration of conductor heating current required to have been carried out before the commencement of these tests.
– 19 –
HD 629.1 S2:2006
Table 9 – Additional tests for non-circular conductor profile (1) and/or insulation screen compliance (see 6.4 and 6.6) Test
Test clause of EN 61442
Test sequence
Test requirements
1
DC voltage dry
5
x
15 min at 6 Uo,no breakdown nor flashover
2
AC voltage dry
4
x
5 min at 4,5 Uo,no breakdown nor flashover
3
Partial discharge at ambient and elevated temperature (2)
7
x
max. 10 pC at 1,73 Uo (5)
4
Heating cycle voltage in air
9
x
126 cycles at 2,5 Uo (4),no breakdown nor flashover
5
Partial discharge at elevated and ambient temperature (2)
7
x
max. 10 pC at 1,73 Uo (5)
6
Impulse voltage at ambient temperature
6
x
10 impulses of each polarity,no breakdown nor flashover
7
AC voltage dry
4
x
15 min at 2,5 Uo, no breakdown nor flashover
8
Examination
-
x
For information only (6)
(1)
(3)
The number of samples tested shall be -
terminations
:
half the number in Figure A1,
-
joints
:
half the number in Figure B1,
-
stop ends
:
half the number in Figure C1,
-
screened separable connectors
:
half the number in Figure D1,
-
unscreened separable connectors
:
half the number in Figure E1.
(2)
For stop-ends, only ambient temperature testing applies.
(3)
Not applicable to stop ends, see note (4).
(4)
For stop ends 1 000h at 2,5 Uo at ambient temperature.
(5)
If the relevant cable specification uses a level > 1,73 Uo the test voltage shall be 2 Uo with a maximum of 10 pC. Compliance at 2 Uo also gives compliance at 1,73 Uo.
(6)
The accessories shall be examined and the following information included in the test report: (i)
cracking in the filling media and/or tape or tube components;
(ii)
a moisture path bridging 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.
and/or
NOTE Refer to Clause 8 of EN 61442 for details of the calibration of conductor heating current required to have been carried out before the commencement of these tests.
HD 629.1 S2:2006
– 20 –
Table 10 – Additional tests for smallest and largest cable cross section compliance (see 6.1) Test
Test clause of EN 61442
Test sequence
(1)
Test requirements
1
DC voltage dry
5
x
15 min at 6 Uo,no breakdown nor flashover
2
AC voltage dry
4
x
5 min at 4,5 Uo,no breakdown nor flashover
3
Partial discharge at ambient temperature
7
x
max. 10 pC at 1,73 Uo (3)
4
Impulse at ambient temperature
6
x
10 impulses of each polarity,no breakdown nor flashover
5
Heating cycle voltage in air (2)
9
x
10 cycles at 2,5 Uo,no breakdown nor flashover
6
Partial discharge at elevated and ambient temperature (2)
7
x
max. 10 pC at 1,73 Uo (3)
7
AC voltage dry
4
x
15 min at 2,5 Uo, no breakdown nor flashover
8
Examination
-
x
For information only (4)
(1)
The number of samples tested shall be -
terminations
:
half the number in Figure A1,
-
joints
:
half the number in Figure B1,
-
stop ends
:
half the number in Figure C1,
-
screened separable connectors
:
half the number in Figure D1,
-
unscreened separable connectors
:
half the number in Figure E1.
(2)
The test is not applicable to stop ends.
(3)
If the relevant cable specification uses a level > 1,73 U o the test voltage shall be 2 U o with a maximum of 10 pC . Compliance at 2 U o also gives compliance at 1,73 U o.
(4)
The accessories shall be examined and the following information included in the test report. (i)
cracking in the filling media and/or tape or tube components;
and/or
(ii)
a moisture path bridging 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.
NOTE Refer to Clause 8 of EN 61442 for details of the calibration of conductor heating current required to have been carried out before the commencement of these tests.
Table 11 – Summary of test voltages (see Clause 7) Test
Test voltage
Rated voltage U o /U (U m ) kV 3,6/6(7,2)
3,8/6,6(7,2)
6/10(12)
6,35/11(12)
8,7/15(17,5)
12/20(24)
12,7/22(24)
18/30(36)
19/33(36)
20,8/36(42)
1,25 Uo
4,5
5,0
7,5
8
11
15
16
22,5
24
26
Partial discharge
1,73 Uo
6
6,5
10
11
15
20
22
30
33
36
2 Uo
7
7,5
12
12,5
17,5
24
25
36
38
42
2,5 Uo
9
9,5
15
16
23
30
32
45
47,5
52
AC voltage / 1 min
4 Uo
14,5
15
24
25,5
35
48
51
72
76
83
AC voltage / 5 min
4,5 Uo
16
17
27
28,5
39
54
57
81
85,5
93,5
6 Uo
21,5
23
36
38
52
72
76
108
114
125
-
60
60
75
95
95
125
125
170
194
200
Heating cycle voltage and AC voltage / 15 min and 500 h
DC voltage / 15 min Impulse (peak)
– 21 –
Humidity and salt fog
HD 629.1 S2:2006
Single-core accessories 4 samples
Three-core accessories 2 samples
Three-core accessories 2 samples
A1
3 samples Short circuit generator
1 sample Short-circuit generator
HD 629.1 S2:2005
Sequence
1 sample Short-circuit generator
A2
– 22 –
3 samples
1 sample
A3
NOTE
The cable lengths measured between the cable entry points of the accessories shall be > 2 m.
Figure 1 – Test arrangements for terminations
1 sample
Sequence
Single-core accessories
Three-core accessories
4 samples
2 samples
B1
3 samples
Short-circuit generator
1 sample
– 23 –
B2 Short-circuit generator
NOTE 1 NOTE 2
The cable lengths measured between the cable entry points of the accessories shall be > 2 m. Testing of joints in separate loops is permitted.
HD 629.1 S2:2006
Figure 2 - Test arrangements for joints
Three-core accessories
Single-core accessories 4 samples
HD 629.1 S2:2005
Sequence
2 samples
C1
– 24 –
NOTE
The cable lengths measured between the cable entry points of the accessories shall be > 2 m.
Figure 3 – Test arrangements for stop ends
Sequence
Single-core accessories
Sequence
Three-core accessories
3 samples
4 samples
D2
Short-circuit generator D1
– 25 –
1 sample (each test)
D3
The cable lengths measured between the cable entry points of the accessories shall be > 2 m.
Figure 4 – Test arrangements for screened separable connectors
HD 629.1 S2:2006
NOTE
Single-core accessories
Sequence
HD 629.1 S2:2005
Sequence
Three-core accessories
3 samples
4 samples
E2
Short-circuit generator E1
– 26 –
3 samples in a test terminal box
E3
Three-phase supply NOTE
The cable lengths measured between the cable entry points of the accessories shall be > 2 m.
Figure 5 – Test arrangement for unscreened separable connectors
– 27 –
HD 629.1 S2:2006
Annex A (informative) Identification of test cable (see 5.1) Rated voltage U o /U (U m ): Construction:
Conductors:
kV
3-core
1-core
Al Stranded Circular 120 mm²
Cu Solid Shaped 150 mm²
Other cross-section: Insulation:
185 mm²
mm²
XLPE EPR
Insulation screen:
Individually screened Overall screen
HEPR
Bonded Strippable
Oversheath:
Wire Wire PVC
Water blocking, if any:
Within conductor Under oversheath
Diameters:
• Conductor
mm
• Insulation
mm
• Insulation screen
mm
• Oversheath
mm
Metallic screen: Armour:
Cable marking:
Tape Extruded Tape PE (state type)
HD 629.1 S2:2006
– 28 –
Bibliography The following document is referenced in the text for information: HD 621 Medium voltage impregnated paper insulated distribution cables
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