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1、BRITISH STANDARD BS EN 60255-5:2001 IEC 60255-5:2000 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 NO COPYING WITHOUT BSI PERMISSION EXCEP
2、T AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:52:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60255-5:2001 This British Standard, having been prepared under the direction of the Electrotechnical Sector Committee, was published under the authority of
3、 the Standards Committee and comes into effect on 15 August 2001 BSI 08-2001 ISBN 0 580 37746 6 National foreword 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 It supersedes BS 5992-3:1980 which is withdrawn.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
4、to Technical Committee PEL/95, Measuring relays and protection systems, which has the responsibility to: 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 ins
5、tance, IEC 27-1 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 docume
6、nt may be found 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 Bri
7、tish Standards are 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 propos
8、als for change, and 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 33 and a back cover. The BSI copyright date displaye
9、d in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:52:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARDEN 60255-5 NORME EUROPENNE EUROPISCHE NORMApril 2001 C
10、ENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2001 CENELEC -All rights of exploitation in any form and by any means reserved wo
11、rldwide for CENELEC members. Ref. No. EN 60255-5:2001 E ICS 29.120.70 English version Electrical relays Part 5: Insulation coordination for measuring relays and protection equipment - Requirements and tests (IEC 60255-5:2000) Relais lectriques Partie 5: Coordination de lisolement des relais de mesur
12、e et des dispositifs de protection - Prescriptions et essais (CEI 60255-5:2000) 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 boun
13、d to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions 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 Ce
14、ntral Secretariat or to any CENELEC member. This European Standard exists in three 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
15、status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Co
16、py: sheffieldun sheffieldun, na, Fri Nov 10 07:52:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 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
17、 by CENELEC 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(dop) 2001-12-01 latest da
18、te by which the national standards conflicting with the EN have to be withdrawn(dow) 2004-03-01 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 informa
19、tive. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60255-5:2001 was approved by CENELEC as a European Standard without any modification. _ EN 602555:2001 2 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:52:02 GMT+00:00 2006, Uncontrol
20、led Copy, (c) BSI BSI 08-2001 CONTENTS Page INTRODUCTION 4 Clause 1Scope and object. 5 2Normative references. 5 3Definitions . 6 4Insulation coordination. 9 4.1Basic principles 9 4.2Voltages and voltage ratings10 4.3Time under voltage stress12 4.4Pollution 13 4.5Information to be found on the relay
21、or in the operating instructions 13 4.6lnsulation material .13 5Dimensioning requirements and rules .14 5.1Dimensioning of clearances.14 5.2Dimensioning of creepage distances14 5.3Requirements for design of solid insulation15 6Tests and measurements16 6.1Tests .16 6.2Measurements.22 Annex A (informa
22、tive) Nominal voltages of supply systems .23 Annex B (informative) Altitude correction factors24 Annex C (informative) Guidance for impulse voltage tests25 Annex D (informative) Measurement of creepage distances and clearances.26 Annex ZA (normative) Normative references to international publication
23、s with their corresponding European publications.32 Table 1 Rated insulation voltages.10 Table 2 Rated impulse voltages (waveform: 1,2/50 ?s).12 Table 3 Minimum clearances in air .14 Table 4 Minimum creepage distances.15 Table 5 Impulse test voltages.18 Table 6 ? AC test voltages 20 Table 7 Symbols
24、for marking of test voltages .21 Table A.1 Nominal voltages of supply systems.23 Table B.1 Altitude correction factors.24 Table C.1 Components of the test generator 25 EN 602555:2001 3 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:52:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 08-2
25、001 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 nominal voltage of the supply circuit and the applicable overvolt
26、age 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 rationalised test voltage of 5 kV has been specified in this standard. It is ap
27、plicable 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 2 000 m. The existing impulse test generators designed according to IEC 60060-
28、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 are necessary to retain the specified output energy of 0,5 J.
29、 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 to 50 ? has been considered, because a value of this order wou
30、ld seem to correspond better to the characteristic impedance of the substation wiring (see also IEC 61000-4-5). However, considering the satisfactory experience with the current standard and in order to avoid the existing test generators from becoming obsolete, the 500 ? value has been retained. Imp
31、ulse 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 completion of the tests. Withstand surge testing of circuits is not pa
32、rt 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. EN 602555:2001 4 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:52:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 08-2001 ELECTRICAL RELAYS
33、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 protection equipment. NOTE 1Unless otherwise stated, the term “relay(s)” i
34、s used as an abbreviation for the expression “measuring relays and protection equipment” in this standard. In particular, this standard, specifies the following: definition of terms; guidance for the selection of clearances and creepage distances and other aspects related to the insulation of measur
35、ing relays and protection equipment; requirements for voltage tests and insulation resistance measurement. This standard is applicable to the installation and use at altitudes up to 2 000 m of equipment having a rated a.c. voltage up to 1 000 V, with a rated frequency up to 65 Hz, or a d.c. voltage
36、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, except where the devices are covered by other IEC publications, for example comm
37、unication interfaces. NOTE 2Requirements for altitudes exceeding 2 000 m can be derived from table B.1. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 60255. For dated references, subsequent
38、 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 of the normative documents indicated below. For undated references, the latest ed
39、ition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. IEC 60050(151):1978, International Electrotechnical Vocabulary (IEV) Chapter 151: Electrical and magnetic devices IEC 60050(448):1995, International Electrotechn
40、ical Vocabulary Chapter 448: Power system protection IEC 60060-1:1989, High-voltage test techniques Part 1: General definitions and test requirements IEC 60085:1984, Thermal evaluation and classification of electrical insulation EN 602555:2001 5 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10
41、 07:52:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 08-2001 IEC 60112:1979, Method for determining the comparative and the proof tracking indices of solid insulating materials under moist conditions IEC 60255 (all parts), Electrical relays IEC 60255-21-1:1988, Electrical relays Part 21: Vibrati
42、on, 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 seismic tests on measuring relays and protection equipment Section 2: Shock and bump tests IEC 60255-21-3:
43、1993, Electrical relays Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment Section 3: Seismic tests IEC 60664-1:1992, Insulation coordination for equipment within low-voltage systems Part 1: Principles, requirements and tests IEC 61000-4-5:1995, Electromag
44、netic compatibility (EMC) Part 4: Testing and measurement techniques Section 5: Surge immunity test IEC 61180-1:1992, High-voltage test techniques for low-voltage equipment Part 1: Definitions and test procedure requirements IEC 61180-2:1994, High-voltage test techniques for low-voltage equipment Pa
45、rt 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 parts of IEC 60255 apply. 3.1 hazardous live part part at a voltage in excess of 50 V r.m.s. or 75 V d.c. 3.2 exposed conductive
46、 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 1For relays which are not enclosed, the frame, the fixing devices, etc., form the exposed conductive parts. NOTE 2For relays which are enclos
47、ed, 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 parts. Small parts such as inscription plates, screws and rivets which are isolated from the circuits are not taken into considera
48、tion. 3.3 clearance shortest distance in air between two conductive parts IEC 60664-1 3.4 solid insulation solid insulating material interposed between any two conductive parts IEC 60664-1 EN 602555:2001 6 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:52:02 GMT+00:00 2006, Uncontrolled C
49、opy, (c) BSI BSI 08-2001 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 60664-1 3.7 rated insulation voltage r.m.s. withstand voltage value assigned by the manufacturer to the relay or to a part o