《BS-EN-60071-1-2006.pdf》由会员分享，可在线阅读，更多相关《BS-EN-60071-1-2006.pdf（38页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS EN 60071-1:2006 Insulation co-ordination Part 1: Definitions, principles and rules The European Standard EN 60071-1:2006 has the status of a British Standard ICS 29.080.30 ? Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:17:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
2、 BS EN 60071-1:2006 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2006 BSI 2006 ISBN 0 580 48699 0 National foreword This British Standard is the official English language version of EN 60071-1:2006. It is identical with IEC 60071-1
3、:2006. It supersedes BS EN 60071-1:1996 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee GEL/28, Insulation co-ordination, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretar
4、y. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue
5、 or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the t
6、ext; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover
7、, an inside front cover, the EN title page, pages 2 to 35 and a back cover. The BSI copyright notice displayed 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 07:17:45 GMT+0
8、0:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 60071-1 NORME EUROPENNE EUROPISCHE NORM May 2006 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Sta
9、ssart 35, B - 1050 Brussels 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60071-1:2006 E ICS 29.080.30 Supersedes EN 60071-1:1995 English version Insulation co-ordination Part 1: Definitions, principles and rules (IEC 60071
10、-1:2006) Coordination de lisolement Partie 1: Dfinitions, principes et rgles (CEI 60071-1:2006) Isolationskoordination Teil 1: Begriffe, Grundstze und Anforderungen (IEC 60071-1:2006) This European Standard was approved by CENELEC on 2006-03-01. CENELEC members are bound to comply with the CEN/CENEL
11、EC 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 Central Secretariat or to any CE
12、NELEC 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 status as the official version
13、s. 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, S
14、lovenia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:17:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Foreword The text of document 28/176/FDIS, future edition 8 of IEC 60071-1, prepared by IEC TC 28, Insulation co-ordination, was subm
15、itted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60071-1 on 2006-03-01. This European Standards supersedes EN 60071-1:1995. The main changes from EN 60071-1:1995 are as follows: - in the definitions (3.26, 3.28 and 3.29) and in the environmental conditions (5.9) taken into ac
16、count clarification of the atmospheric and altitude corrections involved in the insulation co-ordination process; - in the list of standard rated short-duration power frequency withstand voltages reported in 5.6 addition of 115 kV; - in the list of standard rated impulse withstand voltages reported
17、in 5.7, addition of 200 kV and 380 kV; - in the standard insulation levels for range I (1 kV 245 kV) (Table 3) replacement of 525 kV by 550 kV and of 765 kV by 800 kV; - in order to remove that part in the next revision of EN 60071-2, addition of Annex A dealing with clearances in air to assure a sp
18、ecified impulse withstand voltage in installation; - in Annex B, limitation at two Um values for the values of rated insulation levels for 1 kV 245 kV)23 Table A.1 Correlation between standard rated lightning impulse withstand voltages and minimum air clearances30 Table A.2 Correlation between stand
19、ard rated switching impulse withstand voltages and minimum phase-to-earth air clearances 31 Table A.3 Correlation between standard rated switching impulse withstand voltages and minimum phase-to-phase air clearances.32 Table B.1- Values of rated insulation levels for 1kV 245 kV) Standard rated switc
20、hing impulse withstand voltage Highest voltage for equipment (Um) kV (r.m.s. value) Longitudinal insulation a kV (peak value) Phase-to-earth kV (peak value) Phase-to-phase (ratio to the phase-to-earth peak value) Standard rated lightning impulse withstand voltage b kV (peak value) 850 750 750 1,50 9
21、50 950 300 c 750 850 1,50 1050 950 850 850 1,50 1050 1050 362 850 950 1,50 1175 1050 850 850 1,60 1175 1175 950 950 1.50 1300 1300 420 950 1050 1,50 1425 1175 950 950 1,70 1300 1300 950 1050 1,60 1425 1425 550 950 1050 1175 1,50 1550 1675 1175 1300 1,70 1800 1800 1175 1425 1,70 1950 1950 800 1175 13
22、00 1550 1,60 2100 NOTE The introduction of Um above 800 kV is under consideration, and 1050 kV, 1100 kV and 1200 kV are listed as Um in IEC 60038 Amendment 2, 1997. a Value of the impulse component of the relevant combined test while the peak value of the power- frequency component of opposite polar
23、ity is Um 2 / 3. b These values apply as for phase-to-earth and phase-to-phase insulation as well; for longitudinal insulation they apply as the standard rated lightning impulse component of the combined standard rated withstand voltage, while the peak value of the power-frequency component of oppos
24、ite polarity is 0,7 Um 2 / 3. c This Um is a non preferred value in IEC 60038. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:17:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60071-1:2006 24 5.11 Background of the standard insulation levels 5.11.1 General The standard insulation levels
25、 given in Table 2 and Table 3 reflect the experience of the world, taking into account modern protective devices and methods of overvoltage limitation. The selection of a particular standard insulation level should be based on the insulation co- ordination procedure in accordance with the insulation
26、 co-ordination procedure described in IEC 60071-2 (third edition) and should take into account the insulation characteristics of the particular equipment being considered. In range I, the standard rated short-duration power-frequency or the standard rated lightning impulse withstand voltage should c
27、over the required switching impulse withstand voltages phase-to-earth and phase-to-phase as well as the required longitudinal withstand voltage. In range II, the standard rated switching impulse withstand voltage should cover the required short-duration power-frequency withstand voltage if no value
28、is required by the relevant apparatus committee. In order to meet these general requirements, the required withstand voltages should be converted to those voltage shapes for which standard rated withstand voltages are specified using test conversion factors. The test conversion factors are determine
29、d from existing results to provide a conservative value for the rated withstand voltages. IEC 60071-1 leaves it to the relevant apparatus committee to prescribe a long-duration power-frequency test intended to demonstrate the response of the equipment with respect to ageing of internal insulation or
30、 to external pollution (see also IEC 60507). 5.11.2 Standard rated switching impulse withstand voltage In Table 3, standard rated switching impulse withstand voltages associated with each highest voltage for equipment have been chosen in consideration of the following: a) for equipment protected aga
31、inst switching overvoltages by surge arresters: the expected values of temporary overvoltages; the characteristics of presently available surge arresters; the co-ordination and safety factors between the protective level of the surge arrester and the switching impulse withstand voltage of the equipm
32、ent; b) for equipment not protected against switching overvoltages by surge arresters: the acceptable risk of disruptive discharge considering the probable range of overvoltages occurring at the equipment location; the degree of overvoltage control generally deemed economical, and obtainable by care
33、ful selection of the switching devices and in the system design. 5.11.3 Standard rated lightning impulse withstand voltage In Table 3, standard rated lightning impulse withstand voltages associated with each standard rated switching impulse withstand voltage have been chosen in consideration of the
34、following: Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:17:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 25 EN 60071-1:2006 a) for equipment protected by close surge arresters, the low values of lighting impulse withstand level are applicable. They are chosen by taking into account the
35、ratio of lightning impulse protective level to switching impulse protective level likely to be achieved with surge arresters, and by adding appropriate margins; b) for equipment not protected by surge arresters (or not effectively protected), only the higher values of lightning impulse withstand vol
36、tages shall be used. These higher values are based on the typical ratio of the lightning and switching impulse withstand voltages of the external insulation of apparatus (e.g. circuit-breakers, disconnectors, instrument transformers, etc.). They are chosen in such a way that the insulation design wi
37、ll be determined mainly by the ability of the external insulation to withstand the switching impulse test voltages; c) in a few extreme cases, provision should be made for a higher value of lightning impulse withstand voltage. This higher value shall be chosen from the series of standard values give
38、n in 5.6 and 5.7. 6 Requirements for standard withstand voltage tests 6.1 General requirements Standard withstand voltage tests are performed to demonstrate, with suitable confidence, that the actual withstand voltage of the insulation is not lower than the corresponding specified withstand voltage.
39、 The voltages applied in withstand voltage tests are standard rated withstand voltages unless otherwise specified by the relevant apparatus committees. In general, withstand voltage tests consist of dry tests performed in a standard situation (test arrangement specified by the relevant Apparatus Com
40、mittees and the standard reference atmospheric conditions). However, for non-weather protected external insulation, the standard short-duration power-frequency and switching impulse withstand voltage tests consist of wet tests performed under the conditions specified in IEC 60060-1. During wet tests
41、, the rain shall be applied simultaneously on all air and surface insulation under voltage. If the atmospheric conditions in the test laboratory differ from the standard reference atmospheric conditions, the test voltages shall be corrected according to IEC 60060-1. All impulse withstand voltages sh
42、all be verified for both polarities, unless the relevant apparatus committees specify one polarity only. When it has been demonstrated that one condition (dry or wet) or one polarity or a combination of these produces the lowest withstand voltage, then it is sufficient to verify the withstand voltag
43、e for this particular condition. The insulation failures that occur during the test are the basis for the acceptance or rejection of the test specimen. The relevant apparatus committees or technical committee 42 shall define the occurrence of a failure and the method to detect it. When the standard
44、rated withstand voltage of phase-to-phase (or longitudinal) insulation is equal to that of phase-to-earth insulation, it is recommended that phase-to-phase (or longitudinal) insulation tests and phase-to-earth tests be performed together by connecting one of the two phase terminals to earth. License
45、d Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:17:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60071-1:2006 26 6.2 Standard short-duration power-frequency withstand voltage tests A standard short-duration power-frequency withstand voltage test consists of one application of the relevant stan
46、dard rated withstand voltage to the terminals of the insulation configuration. Unless otherwise specified by the relevant apparatus committees, the insulation is considered to have passed the test if no disruptive discharge occurs. However, if one disruptive discharge occurs on the self-restoring in
47、sulation during a wet test, the test may be repeated once and the equipment is considered to have passed the test if no further disruptive discharge occurs. When the test cannot be performed (such as for transformers with non-uniform insulation), the relevant apparatus committees may specify frequen
48、cies up to few hundred hertz and durations shorter than 1 min. Unless otherwise justified, the test voltages shall be the same. 6.3 Standard impulse withstand voltage tests A standard impulse withstand voltage test consists of a specified number of applications of the relevant standard rated withsta
49、nd voltage to the terminals of the insulation configuration. Different test procedures may be selected to demonstrate that the withstand voltages are met with a degree of confidence that experience has shown to be acceptable. The test procedure shall be selected by the apparatus committees from the following test procedures which are standardized and fully described in IEC 60060-1: Three-impulse withstand voltage test in which no disruptive discharge is tolera