BS EN 60702-2-2002 Mineral insulated cables and their terminations with a rated voltage not exceeding 750 V Terminations《额定电压不超过750V的矿物绝缘电缆及其终端 终端》.pdf

1、BRITISH STANDARD BS EN 60702-2:2002 IEC 60702-2:2002 Mineral insulated cables and their terminations with a rated voltage not exceeding 750 V Part 2: Terminations The European Standard EN 60702-2:2002 has the status of a British Standard ICS 29.060.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERM

2、ITTED BY COPYRIGHT LAWBS EN 60702-2:2002 This British Standard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 10 April 2002 BSI 10 April 2002 ISBN 0 580 39307

3、0 National foreword This British Standard is the official English language version of EN 60702-2:2002. It is identical with IEC 60702-2:2002. It supersedes BS 6207-2:1995 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee GEL/20, Electric cables, to Subc

4、ommittee GEL/20/17, Low voltage cables, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renu

5、mbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references The British Standards which implement international or European publications referred to in this document may be found i

6、n the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards ar

7、e responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, a

8、nd keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 10, an inside back cover and a back cover. The BSI copyright date dis

9、played in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 60702-2 NORME EUROPENNE EUROPISCHE NORM March 2002 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electr

10、otechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60702-2:2002 E ICS 29.060.20 Supersedes HD 586.2 S1:1994 E

11、nglish version Mineral insulated cables and their terminations with a rated voltage not exceeding 750 V Part 2: Terminations (IEC 60702-2:2002) Cbles isolant minral et leurs terminaisons de tension assigne ne dpassant pas 750 V Partie 2: Terminaisons (CEI 60702-2:2002) Mineralisolierte Leitungen mit

12、 einer Bemessungsspannung bis 750 V Teil 2: Endverschlsse (IEC 60702-2:2002) This European Standard was approved by CENELEC on 2002-03-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a na

13、tional standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version

14、 in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmar

15、k, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Foreword The text of document 20/491/FDIS, future edition 2 of IEC 60702-2, prepared by IEC TC 20, Electric cables, was submitted to the IEC-C

16、ENELEC parallel vote and was approved by CENELEC as EN 60702-2 on 2002-03-01. This European Standard supersedes HD 586.2 S1:1994 and its corrigendum November 1995. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical natio

17、nal standard or by endorsement (dop) 2002-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2005-03-01 Annexes designated “normative“ are part of the body of the standard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC.

18、_ Endorsement notice The text of the International Standard IEC 60702-2:2002 was approved by CENELEC as a European Standard without any modification. _ Page2 EN607022:2002 BSI10April200260702-2 IEC:2002 3 CONTENTS 1 Scope 4 2 Normative references. 4 3 Definitions . 4 4 Marking . 5 4.1 Marking of pac

19、kages. 5 4.2 Marking of seals and glands . 5 5 Construction 5 5.1 Seals 5 5.1.1 Material 5 5.1.2 Connection . 5 5.1.3 Explosive atmospheres . 6 5.1.4 Corrosion resistance. 6 5.1.5 Test requirements. 6 5.1.6 Operating temperature 6 5.2 Glands 6 5.2.1 Material 6 5.2.2 Thread form 6 5.2.3 Entry thread

20、length . 6 5.2.4 Explosive atmospheres . 6 6 Type tests 6 6.1 General 6 6.2 Seals 7 6.2.1 Voltage test 7 6.2.2 Insulation resistance test 7 6.2.3 Insulation integrity test 7 6.2.4 Maximum operating temperature test 7 6.2.5 Temperature cycle test . 7 6.2.6 Tensile test. 8 6.3 Glands 8 6.3.1 Tensile t

21、est. 8 6.4 Electrical earth continuity test. 8 6.4.1 General. 8 6.4.2 Glands or seals with integral protective conductors or other protective conductor attachments 9 6.4.3 Glands intended to provide earth continuity without integral protective conductors 9 Annex ZA (normative) Normative references t

22、o international publications with their corresponding European publications10 Page3 EN607022:2002 BSI10April200260702-2 IEC:2002 4 MINERAL INSULATED CABLES AND THEIR TERMINATIONS WITH A RATED VOLTAGE NOT EXCEEDING 750 V Part 2: Terminations 1 Scope This standard specifies requirements for terminatio

23、ns for use with mineral insulated cables complying with the requirements of IEC 60702-1. 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

24、of the referenced document (including any amendments) applies. IEC 60079-0:1998, Electrical apparatus for explosive gas atmospheres Part 0: General requirements IEC 60364-5-54:1980, Electrical installations of buildings Part 5: Selection and erection of electrical equipment Chapter 54: Earthing arra

25、ngements and protective conductors IEC 60423:1993, Conduits for electrical purposes Outside diameters of conduits for electrical installations and threads for conduits and fittings IEC 60702-1:2002, Mineral insulated cables and their terminations with a rated voltage not exceeding 750 V Part 1: Cabl

26、es 3 Definitions For the purpose of this part of IEC 60702, the following definitions apply. 3.1 termination complete end fitting for a mineral insulated cable, normally comprising a seal and a gland or a composite seal/gland device, but excluding the locknut and any associated junction box or acces

27、sory 3.2 seal part of a termination designed to seal the end of the cable against entry of moisture. The design must be such as to provide insulation between conductors and between conductors and sheath and provide conductor insulation external to the seal. It may also have a means of providing a pr

28、otective conductor Page4 EN607022:2002 BSI10April200260702-2 IEC:2002 5 3.3 gland part of a termination designed to secure the cable in a cable entry. It may or may not be used to ensure earth continuity depending upon the type of construction and material used 3.4 type tests (symbol T) tests made b

29、efore supplying, on a general commercial basis, a type of termination covered by this standard, in order to demonstrate satisfactory performance characteristics to meet the intended application. These tests are such that, after they have been made, they need not be repeated unless changes are made i

30、n the termination material, design or manufacturing process which might change the performance characteristics 4 Marking 4.1 Marking of packages Packages in which terminations or parts of terminations are supplied shall be marked with the following particulars: a) the number of this standard; b) a m

31、eans of identifying the manufacturer or supplier; c) the maximum and minimum operating temperature of the seals; d) a mark or means of identifying the cables for which it is intended; e) whether a protective conductor is provided; f) gland thread form and size. 4.2 Marking of seals and glands Seals

32、and glands shall be marked with a means of identifying the cable or cables for which they are intended. In addition, glands certified for use in hazardous areas shall be marked in accordance with IEC 60079-0. 5 Construction 5.1 Seals 5.1.1 Material A seal shall consist of a moisture-resistant sealin

33、g material contained, if necessary, within a suitable enclosure, and shall provide electrical insulation for the cable conductors. 5.1.2 Connection A protective conductor may be connected to a metallic sealing enclosure by any suitable method (e.g. welding, brazing, crimping or soldering), or it may

34、 be connected directly on the metal sheath by any suitable attachment (e.g. clip or clamp). The size of the protective conductor shall be in accordance with IEC 60364-5-54, and the attachment shall meet the electrical continuity test requirement specified in 6.4.1. Page5 EN607022:2002 BSI10April2002

35、60702-2 IEC:2002 6 5.1.3 Explosive atmospheres A seal for use in potentially explosive atmospheres shall, in addition to complying with the requirements of this standard, also satisfy the appropriate requirements specified in IEC 60079-0. 5.1.4 Corrosion resistance A seal or enclosure shall be made

36、from material which will ensure freedom from corrosion arising from electrolytic action. 5.1.5 Test requirements The material used in the seal shall be such that the completed seal is capable of meeting the test requirements specified in this standard. 5.1.6 Operating temperature The conductor insul

37、ation shall be suitable for the range of operating temperatures stated for the seal by the manufacturer. 5.2 Glands 5.2.1 Material A gland may be of any suitable material providing that it ensures freedom from corrosion arising from electrolytic action and meets the test requirements specified in th

38、is standard. 5.2.2 Thread form The gland entry threads shall have a preferred thread form in accordance with those specified for conduit in IEC 60423. Other threads are permitted provided that the gland complies with all the other requirements of this standard. 5.2.3 Entry thread length The length o

39、f gland entry threads shall be not less than 8 mm. 5.2.4 Explosive atmospheres Glands for use in potentially explosive atmospheres shall, in addition to complying with the requirements of this standard, also satisfy the appropriate requirements specified in IEC 60079-0. 6 Type tests 6.1 General The

40、tests in this standard are type tests intended to establish termination design charac- teristics. Unless otherwise specified, all tests shall be carried out at an ambient temperature of (20 10) C. The test voltage shall be either a.c. of approximately sinusoidal waveform at a frequency in the range

41、49 Hz to 61 Hz, or d.c. equal to the peak value of the alternating voltage, and shall be applied gradually. Page6 EN607022:2002 BSI10April200260702-2 IEC:2002 7 The seals and glands to be tested shall be fitted in accordance with the manufacturers recommendations to both ends of (300 50) mm lengths

42、of cable complying with IEC 60702-1, of a size and rated voltage appropriate to the seals/glands under test. Each seal shall be fitted as soon as possible after the end of the cable has been prepared, to minimize the ingress of moisture. New seals/glands shall be taken for each electrical and mechan

43、ical test. 6.2 Seals 6.2.1 Voltage test The sample shall withstand the following test voltage applied between each conductor and every other conductor, and between all conductors bunched together and the sheath, for 5 min: 2 000 V r.m.s. for seals for 500 V cable; 2 500 V r.m.s. for seals for 750 V

44、cable. 6.2.2 Insulation resistance test The insulation resistance measured with a d.c. voltage between 80 V and 500 V applied between each conductor and every other conductor, and between each conductor and the sheath shall be not less than 100 M . 6.2.3 Insulation integrity test This test shall be

45、carried out, in addition to the insulation resistance test after the environ- mental tests specified in 6.2.4 and 6.2.5, as an indirect check that the insulation has not deteriorated. The insulation integrity test is a voltage test applied between each conductor and every other conductor and between

46、 each conductor and the sheath. A voltage equal to the rated voltage of the cable shall be applied for 5 min. No insulation breakdown shall occur. 6.2.4 Maximum operating temperature test The sample shall be heated to a temperature at least 5 K - and not more than 10 K - higher than the maximum oper

47、ating temperature specified by the manufacturer. At this temperature, the sample shall pass the insulation integrity test as specified in 6.2.3, and the insulation resistance measured with a d.c. voltage between 80 V and 500 V applied between each conductor and every other conductor and between each

48、 conductor and the sheath shall be not less than 1 M . 6.2.5 Temperature cycle test The sample shall be heated to a temperature at least 5 K - and not more than 10 K - higher than the maximum operating temperature specified by the manufacturer and maintained at this temperature for (16 1) h. Then it

49、 shall be transferred to a refrigerated compartment and maintained at the minimum operating temperature specified by the manufacturer ( 5 K) for (8 1) h. This cycle shall be repeated 20 times. On completion of the 20 cycles the sample shall be allowed to return to room temperature, and then it shall be placed in a humidity cabinet at (25 5) C and (95 5) % relative humidity for (16 1) h. Page7 EN607022:2002 BSI10April200260702-2 IEC:2