Cenelec Spec Hd629-1

HARMONIZATION DOCUMENT HD 629.1 S2 DOCUMENT D'HARMONISATION

HARMONISIERUNGSDOKUMENT February 2006

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

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.

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.

__________

3 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 4

1 Scope

1.1 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 Uo/U (Um) 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:

Uo 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;

Um 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).

5 HD 629.1 S2:2006

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 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 (Um = 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 (Um = 7,2 kV) up to 36 kV (Um = 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 International Electrotechnical Vocabulary - Chapter 461: Electric cables

3 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 6

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

7 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 8

5.2 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 terminal box, which shall conform to the relevant standards 2).

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.

9 HD 629.1 S2:2006

5.7 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

400 A

630 A

800 A

1 250 A

50

95

185

300

500

70

150

300

400

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 cross-sections 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 cross-section 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 10

6.5 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

EPR or HEPR

XLPE, HEPR, EPR, PVC

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 Uo shall extend to operation of the accessory at a lower Uo.

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.


Class 3 Three core and single core accessories designed for initial peak currents above 100 kA up to and including 125 kA.


11 HD 629.1 S2:2006

8 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 12

Table 3 – Indoor terminations for extruded insulation cables (including shrouded terminations) (see Figure 1)

Test Test clause of EN 61442

Test sequence Test requirements

A1 A2 A3

1

2

3

4

5

6

7

8

9

10

11

12

13

DC voltage dry AC voltage dry Partial discharge at ambient temperature Impulse voltage at elevated temperature Heating cycle voltage in air Partial discharge at elevated and ambient temperature Thermal short circuit (screen) (1)

Thermal short circuit (conductor) Dynamic short circuit Impulse voltage at ambient temperature AC voltage dry Humidity (2) Examination

5

4

7

6

9

7

10

11

12

6

4

13 -

x x x x x x x x x

x x x x x x x x

x x

15 min at 6 Uo, no breakdown nor flashover 5 min at 4,5 Uo, no breakdown nor flashover max. 10 pC at 1,73 Uo

(4) 10 impulses of each polarity, no breakdown nor flashover 126 cycles at 2,5 Uo, no breakdown nor flashover max. 10 pC at 1,73 Uo

(4) 2 short circuits at Isc, no breakdown 2 short circuits to raise conductor to θsc of the cable, no breakdown 1 short circuit at Id

(3), no breakdown

10 impulses of each polarity, no breakdown nor flashover 15 min at 2,5 Uo, no breakdown nor flashover 300 h duration at 1,25 Uo

(5)

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) Not required for terminations with porcelain insulators.

(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) 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:

(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.

(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.

13 HD 629.1 S2:2006

Table 4 – Outdoor terminations for extruded insulation cables (see Figure 1)

Test Test clause of


EN 61442 A1 A2 A3

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

DC voltage dry AC voltage dry AC voltage wet Partial discharge at ambient temperature Impulse voltage at elevated temperature Heating cycle voltage in air Immersion Partial discharge at elevated and ambient temperature Thermal short circuit (screen) (1) Thermal short circuit (conductor) Dynamic short circuit Impulse voltage at ambient temperature AC voltage dry Salt fog (2) Examination

5 4 4 7 6 9

9.4 7

10

11

12 6 4

13 -

x x x x x x x x x x x

x x x x x x x x

x x

15 min at 6 Uo, no breakdown nor flashover 5 min at 4,5 Uo, no breakdown nor flashover 1 min at 4 Uo, no breakdown nor flashover max. 10 pC at 1,73 Uo

(4) 10 impulses of each polarity, no breakdown nor flashover 126 cycles at 2,5 Uo, no breakdown 10 cycles max. 10 pC at 1,73 Uo

(4) 2 short circuits at Isc, no breakdown 2 short circuits to raise conductor to θsc of the cable, no breakdown 1 short circuit at Id

(3), no breakdown 10 impulses of each polarity, no breakdown nor flashover 15 min at 2,5 Uo, no breakdown nor flashover 1 000 h duration at 1,25 Uo

(5) For information only (6)


(2) Not required for terminations with porcelain insulators.



(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:











HD 629.1 S2:2006 14

Table 5 – Joints for extruded insulation cables (see Figure 2)

Test Test clause of

Test sequences

Type of joints (1)

Test requirements

EN 61442 I B1

II B1

I-II B2

1

2

3

4

5

6

7

8

9

10

11

12

13

14

DC voltage dry AC voltage dry Partial discharge at ambient temperature Impact at ambient temperature Impulse voltage at elevated temperature Heating cycle voltage in air Heating cycle voltage in water Partial discharge at elevated and ambient temperature Thermal short circuit (screen) (2) Thermal short circuit (conductor) Dynamic short circuit Impulse voltage at ambient temperature AC voltage dry Examination

5 4 7

14 6 9 9 7

10

11

12 6 4 -

x x x x x x x x x x


x x x x x x x x

15 min at 6 Uo, no breakdown 5 min at 4,5 Uo, no breakdown max. 10 pC at 1,73 Uo

(4) Insulation resistance - Conductor to screen 10³ MΩ minimum - Screen to water 50 MΩ minimum 10 impulses of each polarity, no breakdown 63 cycles at 2,5 Uo, no breakdown 63 cycles at 2,5 Uo, no breakdown max. 10 pC at 1,73 Uo

(4) 2 short circuits at Isc,, no breakdown 2 short circuits to raise conductor to θsc of the cable, no breakdown 1 short circuit at Id

(3), no breakdown 10 impulses of each polarity, no breakdown 15 min at 2,5 Uo, no breakdown 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.









15 HD 629.1 S2:2006

Table 6 – Stop ends for extruded insulation cables (see Figure 3)

Test Test clause of

EN 61442

Test sequence

C1

Test requirements

1

2

3

4

5

6

7

8

9

10

DC voltage dry AC voltage dry Partial discharge at ambient temperature Impulse voltage at ambient temperature AC voltage in air AC voltage in water Partial discharge at ambient temperature Impulse voltage at ambient temperature AC voltage dry Examination

5 4 7 6 4 4 7 6 4 -

x x x x x x x x x x


(1) 10 impulses of each polarity, no breakdown 500 h at 2,5 Uo, no breakdown 500 h at 2,5 Uo, no breakdown max. 10 pC at 1,73 Uo

(1) 10 impulses of each polarity, no breakdown 15 min at 2,5 Uo, no breakdown For information only (2)

(1) 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.






HD 629.1 S2:2006 16

Table 7 – Screened separable connectors for extruded insulation cables (see Figure 4)

Test Test clause of


EN 61442 D1 D2 D3

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

DC voltage dry AC voltage dry Partial discharge at ambient temperature Impulse voltage at elevated temperature Heating cycle voltage in air Heating cycle voltage in water Thermal short circuit (screen) (1) Thermal short circuit (conductor) Dynamic short circuit Disconnection/connection (2) Partial discharge at elevated and ambient temperature Impulse voltage at ambient temperature AC voltage dry Operating eye Partial discharge at ambient temperature Examination

5 4 7 6 9 9

10

11

12 - 7 6 4

19 7 -


x x x x x x x x x

x x x

15 min at 6 Uo , no breakdown 5 min at 4,5 Uo, no breakdown max. 10 pC at 1,73 Uo

(5) 10 impulses of each polarity, no breakdown 63 cycles at 2,5 Uo, no breakdown 63 cycles at 2,5 Uo, no breakdown 2 short circuits at Isc, no breakdown 2 short circuits to raise conductor to θsc of the cable, no breakdown 1 short circuit at Id

(4), no breakdown 5 complete operations, no visible damage to contact max. 10 pC at 1,73 Uo

(5) 10 impulses of each polarity, no breakdown 15 min at 2,5 Uo, no breakdown Axial force: 1 300 N for 1 min Torque: 14 N . m max. 10 pC at 1,73 Uo

(5) For information only (6)

17

18

19

20

21

Screen resistance measurement (3)

Leakage current measurement (3) Screen fault current initiation Operating force Capacitive test point performance

15

16

17

18

20

Tests 17 to 21 are carried out on separate samples For tests 17 and 20, no cable is required. For tests 18, 19 and 21 appropriate cable lengths shall be used.

max. 5 000 Ω max. 0,5 mA at Um Solidly earthed system: - fault initiation to occur within 3 s Unearthed/impedance earthed system: - fault current to flow continuously 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 D1 D2 D3


(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.


(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.







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


EN 61442 E1 E2 E3

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

DC voltage dry AC voltage dry Partial discharge at ambient temperature Impulse voltage at elevated temperature Heating cycle voltage in air Heating cycle voltage in water Thermal short circuit (screen) (1) Thermal short circuit (conductor) Dynamic short circuit Disconnection/connection (2) Partial discharge at elevated and ambient temperature Impulse voltage at ambient temperature AC voltage dry Humidity Examination

5 4 7 6 9 9

10

11

12 - 7 6 4

13 -


x x x x x x x x x

x x


(4) 10 impulses of each polarity, no breakdown 63 cycles at 2,5 Uo, no breakdown 63 cycles at 2,5 Uo, no breakdown 2 short circuits at Isc, no breakdown 2 short circuits to raise conductor to θsc of the cable, no breakdown 1 short circuit at Id (3),no breakdown 5 complete operations, no visible damage to contact max. 10 pC at 1,73 Uo

(4) 10 impulses of each polarity, no breakdown 15 min at 2,5 Uo,no breakdown 300 h duration at 1,25 Uo (5) For information only(6)


(2) The test shall be carried out only when the cable is de-energized.



(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 :











19 HD 629.1 S2:2006

Table 9 – Additional tests for non-circular conductor profile and/or insulation screen compliance(1) (see 6.4 and 6.6)

Test Test clause of EN 61442

Test sequence

Test requirements

1

2

3

4

5

6

7

8

DC voltage dry AC voltage dry Partial discharge at ambient and elevated temperature (2) Heating cycle voltage in air (3) Partial discharge at elevated and ambient temperature (2) Impulse voltage at ambient temperature AC voltage dry Examination

5 4 7 9 7 6 4 -

x x x x x x x x

15 min at 6 Uo,no breakdown nor flashover 5 min at 4,5 Uo,no breakdown nor flashover max. 10 pC at 1,73 Uo

(5) 126 cycles at 2,5 Uo

(4),no breakdown nor flashover max. 10 pC at 1,73 Uo

(5) 10 impulses of each polarity,no breakdown nor flashover 15 min at 2,5 Uo, no breakdown nor flashover For information only (6)

(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) 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.








HD 629.1 S2:2006 20

Table 10 – Additional tests for smallest and largest cable cross section compliance (1) (see 6.1)

Test Test

clause of EN 61442

Test sequence

Test requirements

1

2

3

4

5

6

7

8

DC voltage dry AC voltage dry Partial discharge at ambient temperature Impulse at ambient temperature Heating cycle voltage in air (2) Partial discharge at elevated and ambient temperature (2) AC voltage dry Examination

5 4 7 6 9 7 4 -

x x x x x x x x

15 min at 6 Uo,no breakdown nor flashover 5 min at 4,5 Uo,no breakdown nor flashover max. 10 pC at 1,73 Uo

(3) 10 impulses of each polarity,no breakdown nor flashover 10 cycles at 2,5 Uo,no breakdown nor flashover max. 10 pC at 1,73 Uo

(3) 15 min at 2,5 Uo, no breakdown nor flashover 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.


(4) The accessories shall be examined and the following information included in the test report.




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.

21 H

D 629.1 S

2:2006

Table 11 – Summary of test voltages (see Clause 7)

Test Test voltage

Rated voltage Uo/U (Um) 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)

Humidity and salt fog 1,25 Uo 4,5 5,0 7,5 8 11 15 16 22,5 24 26

1,73 Uo 6 6,5 10 11 15 20 22 30 33 36 Partial discharge

2 Uo 7 7,5 12 12,5 17,5 24 25 36 38 42

Heating cycle voltage and AC voltage / 15 min and 500 h

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

DC voltage / 15 min 6 Uo 21,5 23 36 38 52 72 76 108 114 125

Impulse (peak) - 60 60 75 95 95 125 125 170 194 200

H

D 629.1 S2:2005

22

Short circuit generator Short-circuit generator Short-circuit generator

NOTE The cable lengths measured between the cable entry points of the accessories shall be > 2 m.

A1

Sequence Single-core accessories Three-core accessories Three-core accessories

4 samples 2 samples 2 samples

A2

3 samples

A3

3 samples

1 sample 1 sample

1 sample 1 sample

Figure 1 – Test arrangements for terminations

23 H

D 629.1 S

2:2006

Sequence Single-core accessories

4 samples

B1

B2 Short-circuit

generator

3 samples

Three-core accessories

2 samples

1 sample

Short-circuit generator

NOTE 1 The cable lengths measured between the cable entry points of the accessories shall be > 2 m. NOTE 2 Testing of joints in separate loops is permitted.

Figure 2 - Test arrangements for joints

H

D 629.1 S2:2005

24

Sequence

C1

Single-core accessories

4 samples


2 samples


Figure 3 – Test arrangements for stop ends

25 H

D 629.1 S

2:2006


4 samples

D1


Sequence

D2

3 samples


1 sample (each test)

D3


Figure 4 – Test arrangements for screened separable connectors

H

D 629.1 S2:2005

26



4 samples

E1

Three-core accessories Sequence

E2

3 samples


E3

3 samples in a test terminal box

Three-phase supply

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 Uo/U (Um): kV

Construction: 1-core 3-core Individually screened

Overall screen

Conductors: Al Cu

Stranded Solid

Circular Shaped

120 mm² 150 mm² 185 mm²

Other cross-section: mm²

Insulation: XLPE

EPR HEPR

Insulation screen: Bonded Strippable

Metallic screen: Wire Tape Extruded

Armour: Wire Tape

Oversheath: PVC PE (state type)

Water blocking, if any: Within conductor Under oversheath

Diameters: Conductor mm

Insulation mm

Insulation screen mm

Oversheath mm

Cable marking:

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

Date post:	21-Apr-2015
Category:	Documents
Upload:	shona-balaji
View:	942 times
Download:	80 times

Cenelec Spec Hd629-1

Documents