BS 5099-2004 Electric cables - Voltage levels for spark testing《电缆 火花试验电压级》.pdf

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1、BRITISH STANDARD BS 5099:2004 Incorporating Amendment No. 1 Electric cables Voltage levels for spark testing ICS 29.060.20 BS 5099:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 21 April 2005 BSI 29 April 2005 First published July 1974

2、Second edition August 1992 Third edition 30 January 2004 The following BSI references relate to the work on this British Standard: Committee reference GEL/20/17 Draft for comment 02/210395 DC ISBN 0 580 43163 0 Committees responsible for this British Standard The preparation of this British Standard

3、 was entrusted by Technical Committee GEL/20, Electric cables, to Subcommittee GEL/20/17, Low voltage cables, upon which the following bodies were represented: BEAMA Installation Ltd. British Approvals Service for Cables British Cables Association British Plastics Federation Chartered Institution of

4、 Building Services Department of Trade and Industry Consumer Safety Unit Electricity Association Energy Industries Council Engineering Industries Association ERA Technology Ltd. Ministry of Defence UK Defence Standardization Amendments issued since publication Amd. No. Date Comments 15644 29 April 2

5、005 Certification text in foreword changedBS 5099:2004 BSI 29 April 2005 i Contents Page Committees responsible Inside front cover Foreword ii 1S c o p e 1 2 Normative references 1 3A p p l i c a t i o n 1 4E q u i p m e n t 1 5 Test voltage 1 Table 1 Spark test voltage values for insulation for cab

6、les having a rated voltage between 300 V and 3 300 V 2BS 5099:2004 ii BSI 29 April 2005 Foreword This British Standard has been prepared by Subcommittee GEL/20/17. Together with BS EN 50356, it supersedes BS 5099:1992, which is withdrawn. This new edition represents a full revision of the standard.

7、It has been produced to take into account the publication by CENELEC of EN 50356, which has been implemented as BS EN 50356:2002. BS EN 50356 details the apparatus and protocol for spark testing, but gives only limited and informative guidance as to the voltages to be applied. This new edition of BS

8、 5099 therefore provides the full range of applicable test voltages, but no longer gives details of the tests themselves. It has been necessary to revise the title of BS 5099 as a consequence. This British Standard should be read in conjunction with BS EN 50356. It has been assumed in the preparatio

9、n of this British Standard that the execution of its provisions will be entrusted to appropriately qualified and experienced people, for whose use it has been produced. WARNING. This British Standard calls for the use of procedures that can be injurious to health if adequate precautions are not take

10、n. It refers only to technical suitability and does not absolve the user from legal obligations relating to health and safety at any stage. Product certification/inspection/testing. Users of this British Standard are advised to consider the desirability of third-party certification/inspection/testin

11、g of product conformity with this British Standard. Users seeking assistance in identifying appropriate conformity assessment bodies or schemes may ask BSI to forward their enquiries to the relevant association. This publication does not purport to include all the necessary provisions of a contract.

12、 Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 and 2, an inside back cover and a back cover. The B

13、SI copyright notice displayed in this document indicates when the document was last issued.BS 5099:2004 BSI 29 April 2005 1 1 Scope This British Standard specifies voltage test levels for spark testing of insulation or sheathing layers of electric cables in accordance with the method of test given i

14、n BS EN 50356. 2 Normative references The following referenced document is 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. BS EN 50356,

15、Method for spark testing of cables. 3 Application The test voltages specified in this standard shall be applied at the stages of manufacture indicated by the relevant cable standard. NOTE The test clauses of the appropriate cable standard give details of the components to which spark testing is appl

16、icable. 4 Equipment The spark testing equipment shall conform to BS EN 50356. NOTE BS EN 50356 specifies requirements for voltage waveform, procedure, equipment, safety, high voltage source, voltage monitoring equipment, fault indicator, electrodes, design of electrodes, sensitivity and calibration.

17、 5 Test voltage 5.1 General The supply to the test electrode shall be either alternating current (a.c.), direct current (d.c.), high frequency (h.f.) current or pulsed current as specified in BS EN 50356. NOTE The relevant cable specification can limit the type of supply that is applicable for the c

18、able that is to be tested. For all types of testing, the conductor of the core under test, or the conductor, metallic sheath, screen or armour underlying the non-metallic layer to be tested, shall be continuously earthed. 5.2 Insulation When spark testing of insulation is specified in the relevant c

19、able standard, it shall be subjected to the spark test voltage values given by the potential difference between the test electrode and the conductor of the core or cable under test. For cables having a rated voltage between 300 V and 3 300 V, the spark test voltage values shall be in accordance with

20、 Table 1 unless otherwise specified in the relevant cable standard. For cables having a rated voltage greater than 3 300 V, the spark test voltage values shall be either 25 kV a.c. or 38 kV d.c. as specified in the relevant cable standard.BS 5099:2004 2 BSI 29 April 2005 Table 1 Spark test voltage v

21、alues for insulation for cables having a rated voltage between 300 V and 3 300 V 5.3 Insulation and sheath combined When spark testing of a combination of insulation and sheath is specified in the relevant cable standard, it shall be subjected to the following spark test voltage values, unless other

22、wise specified in the cable standard: a) a.c.: 6 kV per millimetre of the combined tabulated radial thickness of insulation and sheath, up to a maximum voltage of 25 kV; b) d.c. and pulse: 9 kV per millimetre of the combined tabulated radial thickness of insulation and sheath, up to a maximum voltag

23、e of 38 kV for d.c. and 23 kV for pulse; c) h.f.: 7 kV per millimetre of the combined tabulated radial thickness of insulation and sheath, up to a maximum voltage of 14 kV. 5.4 Sheath When spark testing of sheath is specified in the relevant cable standard, it shall be subjected to the following spa

24、rk test voltage values, unless otherwise specified in the cable standard: a) a.c.: 6 kV per millimetre of the tabulated radial thickness of sheath, up to a maximum voltage of 25 kV; b) d.c. and pulse: 9 kV per millimetre of the tabulated radial thickness of sheath, up to a maximum voltage of 38 kV f

25、or d.c. and 23 kV for pulse; c) h.f.: 7 kV per millimetre of the tabulated radial thickness of sheath, up to a maximum voltage of 10.5 kV. Tabulated radial thickness of insulation a Test voltage Above Up to and including a.c. d.c. h.f. (r.m.s.) pulse mm mm kV kV kV kV 0.25 3 5 4 5 0.25 0.50 5 7 6 7

26、0.50 0.75 6 9 7 9 0.75 1.00 7 11 8 11 1.00 1.25 9 13 10 b 13 1.25 1.50 10 15 11 b 15 1.50 1.75 12 17 13 b 17 1.75 2.00 13 20 14 b 20 2.00 2.25 14 22 15 b 2.25 2.50 16 24 17 b 2.50 2.75 17 26 18 b 2.75 3.00 19 28 20 b 3.00 25 38 a The tabulated radial thickness is that specified in the relevant table

27、s of the appropriate cable standard. Where more than one thickness is given, the minimum value shall be used. b High frequency (h.f.) voltage testing for layer thickness greater than 1.0 mm should be limited to frequencies between 500 Hz and 4 kHz.blankBS 5099:2004 BSI 389 Chiswick High Road London

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