1、BRITISH STANDARD Electrical relays Part 5: Insulation coordination for measuring relays and protection equipment - Requirements and tests The European Standard EN 60255-5:2001 has the status of a British Standard ICs 29.120.70 BS EN IEC 602 5 5-5 :200 1 60255-5:2000 NO COPYING WITHOUT BSI PERMISSION
2、 EXCEPT AS PERMITTED BY COPYRIGHT LAW COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling ServicesBS EN 60255-5:2001 Amd.No. Date National foreword Comments This British Standard, having been prepared under the direction of the Electrotechnical Sector Co
3、mmittee, was published under the authority of the Standards Committee and comes into effect on 15 August 2001 This British Standard is the official English language version of EN 60255-5:2001. It supersedes BS 5992-3:1980 which is withdrawn. The UK participation in its preparation was entrusted to T
4、echnical Committee PEU95, Measuring relays and protection systems, which has the responsibility to: - - aid enquirers to understand the text; present to the responsible internationallEuropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed;
5、monitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this committee 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
6、has been renumbered 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 publications referred to in this document may be found
7、in 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 a
8、re responsible for their 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, the EN title page, pages 2 to 33 and a back cover. The BSI copyright date display
9、ed in this document indicates when the document was last issued. O BSI 08-2001 ISBN O 580 37746 6 COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling ServicesEUROPEAN STANDARD EN 60255-5 NORME EUROPENNE EUROPISCHE NORM April 2001 ICs 29.120.70 English ve
10、rsion Electrical relays Part 5: Insulation coordination for measuring relays and protection equipment - Requirements and tests (IEC 60255-512000) Relais lectriques Partie 5: Coordination de lisolement des relais de mesure et des dispositifs de protection - Prescriptions et essais (CE1 60255-512000)
11、Elektrische Relais Teil 5: Isolationskoordination fr Merelais und Schutzeinrichtungen - Anforderungen und Prfungen (IEC 60255-5:2000) This European Standard was approved by CENELEC on 2001-03-01. CENELEC members are bound to comply with the CENEENELEC Internal Regulations which stipulate the conditi
12、ons for giving this European, Standard the status of a national 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 thr
13、ee official versions (English, French, German). A version 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 electrotechnic
14、al committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisat
15、ion Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 0 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60255-52001 E COPYRIGHT European Committee for
16、 Electrotechnical StandardizationLicensed by Information Handling ServicesEN 60255-5:2001 Foreword The text of document 95/98/FDIS, future edition 2 of IEC 60255-5, prepared by IEC TC 95, Measuring relays and protection equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CE
17、NELEC as EN 60255-5 on 2001-03-01. This standard should be read in conjunction with HD 625.1 S1:1996. The following dates were fixed: - latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement - latest date by which the na
18、tional standards conflicting with the EN have to be withdrawn Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ are given for information only. In this standard, annex ZA is normative and annexes A to D are informative. Annex ZA has been added by C
19、ENELEC. Endorsement notice (dop) 2001-12-01 (dow) 2004-03-01 The text of the International Standard IEC 60255-5:2001 was approved by CENELEC as a European Standard without any modification. 2 COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling ServicesEN
20、 60255-5:2001 CONTENTS Page INTRODUCTION 4 Clause 1 2 3 4 0 5 6 Scope and object . 5 Normative references . 5 Definitions . 6 Insulation coordination . 9 4.1 Basic principles 9 4.2 Voltages and voltage ratings 10 4.3 Time under voltage stress 12 4.4 Pollution 13 4.5 Information to be found on the re
21、lay or in the operating instructions 13 4.6 Insulation material . 13 Dimensioning of clearances . 14 Dimensioning requirements and rules . 14 5.1 5.2 5.3 Dimensioning of creepage distances 14 Requirements for design of solid insulation 15 Tests and measurements 16 6.2 Measurements . 22 6.1 Tests . 1
22、6 Annex A (informative) Nominal voltages of supply systems . 23 Annex B (informative) Altitude correction factors 24 Annex D (informative) Measurement of creepage distances and clearances . 26 corresponding European publications 32 Annex C (informative) Guidance for impulse voltage tests 25 a Annex
23、ZA (normative) Normative references to international publications with their Table 1 . Rated insulation voltages . 10 Table 2 . Rated impulse voltages (waveform: 1, 2/50 ps) . 12 Table 3 . Minimum clearances in air . 14 Table 4 . Minimum creepage distances . 15 Table 5 . Impulse test voltages . 18 T
24、able 6 . AC test voltages 20 Table 7 . Symbols for marking of test voltages . 21 Table A.l . Nominal voltages of supply systems . 23 Table B.l . Altitude correction factors . 24 Table C.l . Components of the test generator 25 BSI 08-2001 3 COPYRIGHT European Committee for Electrotechnical Standardiz
25、ationLicensed by Information Handling ServicesI EN 60265-5:2001 INTRODUCTION The following points have been considered in the preparation of this standard. - The application of the insulation coordination according to IEC 60664-1 leads to a graded range of rated impulse voltages dependent on the nom
26、inal voltage of the supply circuit and the applicable overvoltage category. Further, the impulse test voltages depend on the air pressure and therefore on the altitude of the test site. Consequently, a wide range of test voltages becomes necessary. For an effective test practice, a rationaliced test
27、 voltage of 5 kV has been specified in this standard. It is applicable for the normal case of relays directly energised via current and voltage transformers or directly connected to the station battery supply. It is applicable independent of the test site altitude, from sea level to 2 O00 m. The exi
28、sting impulse test generators designed according to IEC 60060-1 remain applicable in this case. For other test voltages, the IEC 60060-1 generator can also be used; however components of the generator must be modified depending on the required test voltage, as described in annex C. The modifications
29、 are necessary to retain the specified output energy of 0,5 J. It is expected that suitable impulse test generators with variable output voltage and a fixed output energy of 0,5 J will become available on the market in the near future. Reduction of the source impedance of the impulse test generator
30、to 50R has been considered, because a value of this order would seem to correspond better to the characteristic impedance of the substation wiring (see also IEC 61 000-4-5). However, considering the satisfactory experience with the current standard and in order to avoid the existing test generators
31、from becoming obsolete, the 500 C2 value has been retained. Impulse withstand testing of circuits containing voltage suppression components may lead to heavy distortion of the impulse test waveform. This is acceptable, conditional upon the equipment being undamaged and fully functional after complet
32、ion of the tests. Withstand surge testing of circuits is not part of insulation testing and not part of this standard. The inclusion of the pollution degree is based on IEC 60664-1 and is a new consideration. - - - 4 BSI 08-2001 COPYRIGHT European Committee for Electrotechnical StandardizationLicens
33、ed by Information Handling ServicesEN 60255-5:2001 ELECTRICAL RELAYS - Part 5: Insulation coordination for measuring relays and protection equipment - Requirements and tests 1 Scope and object This part of IEC 60255 gives general requirements for the insulation coordination of measuring relays and p
34、rotection equipment. NOTE 1 relays and protection equipment” in this standard. In particular, this standard, specifies the following: Unless otherwise stated, the term “relay(s)” is used as an abbreviation for the expression “measuring - definition of terms; - guidance for the selection of clearance
35、s and creepage distances and other aspects related to the insulation of measuring relays and protectin equipment; requirements for voltage tests and insulation resistance measurement. - This standard is applicable to the installation and use at altitudes up to 2 O00 m of equipment having a rated a.c
36、. voltage up to 1 O00 V, with a rated frequency up to 65 Hz, or a d.c. voltage up to 1 500 V. This standard also applies to associated auxiliary devices such as shunts, series resistors, transformers, etc., used and tested together with measuring relays and protection equipment as mentioned above, e
37、xcept where the devices are covered by other IEC publications, for example communication interfaces. NOTE 2 Requirements for altitudes exceeding 2 O00 m can be derived from table B.1. 2 Normative references The following normative documents contain provisions which, through reference in this text, c
38、onstitute provisions of this part of IEC 60255. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IEC 60255 are encouraged to investigate the possibility of applying the most recent editions o
39、f the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IS0 and IEC maintain registers of currently valid International Standards. IEC 60050( 151 ):I 978, International Electrotechnical Vocabulary (IEV) - Chapter
40、 151: Electrical and magnetic devices IEC 60050(448):1995, International Electrotechnical Vocabulary - Chapter 448: Power system protection IEC 60060-1 : 1989, High-voltage test techniques - Pat? 1: General definitions and test requirements IEC 60085: 1984, Thermal evaluation and classification of e
41、lectrical insulation BSI 08-2001 5 COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling ServicesEN 60255-5:2001 a IEC 601 12: 1979, Method for determining the comparative and the proof tracking indices of solid insulating materials under moist conditions
42、IEC 60255 (all parts), Electrical relays IEC 60255-21-1:1988, Electrical relays - Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment - Section 1: Vibration tests (sinusoidal) IEC 60255-21-2:1988, Electrical relays - Part 21: Vibration, shock, bump and seis
43、mic tests on measuring relays and protection equipment - Section 2: Shock and bump tests IEC 60255-21-3:1993, Electrical relays - Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment - Section 3: Seismic tests IEC 60664-1 :I 992, Insulation coordination for
44、equipment within low-voltage systems - Part 1: Principles, requirements and tests IEC 61 000-4-5: 1995, Electromagnetic compatibility (EMC) - Part 4: Testing and measurement a techniques - Section 5: Surge immunity test IEC 61 180-1 :1992, High-voltage test techniques for low-voltage equipmenf - Par
45、i 1: Definitions and test procedure requirements IEC 61 180-2:1994, High-voltage test techniques for low-voltage equipment - Part 2: Test equipment 3 Definitions For the purpose of this part of IEC 60255, the following definitions together with those of IEC 60050(448), IEC 60664-1 and the relevant p
46、arts of IEC 60255 apply. 3.1 hazardous live part part at a voltage in excess of 50 V r.m.c. or 75 V d.c. 3.2 exposed conductive part conductive part which can be readily touched and is normally not hazardous live but may be at hazardous live voltage under a single fault condition NOTE 1 For relays w
47、hich are not enclosed, the frame, the fixing devices, etc., form the exposed conductive parts. NOTE 2 For relays which are enclosed, the conductive parts which are accessible when the relay is mounted in its normal position of use, including those of its fixing surface, form the exposed conductive p
48、arts. Small parts such as inscription plates, screws and rivets which are isolated from the circuits are not taken into consideration. 3.3 clearance shortest distance in air between two conductive parts IEC 60664-11 a 3.4 solid insulation solid insulating material interposed between any two conducti
49、ve parts IEC 60664-1 J BSI 08-2001 COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling ServicesEN 60255-52001 3.5 creepage distance shortest distance along the surface of the insulating material between two conductive parts IEV 151- 03-37 3.6 rated voltage value of voltage assigned by the manufacturer to a component, device or equipment and to which operation and performance characteristics are referred IEC 60664-11 3.7 rated insulation voltage r.m.s. withstand voltage value assigned by the manufacturer to the relay or t
