1、BRITISH STANDARDBS EN 60071-1:2006+A1:2010 Insulation co-ordination Part 1: Definitions, principles and rulesICS 29.080.30g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g
2、44g42g43g55g3g47g36g58National forewordThis British Standard is the UK implementation of EN 60071-1:2006+A1:2010. It is identical to IEC 60071-1:2006, incorporating amendment 1:2010. It supersedes BS EN 60071-1:2006 which is withdrawn.The start and finish of text introduced or altered by amendment i
3、s indicated in the text by tags. Tags indicating changes to IEC text carry the number of the IEC amendment. For example, text altered by IEC amendment 1 is indicated by !“.The UK participation in its preparation was entrusted to Technical Committee GEL/28, Insulation co-ordination.A list of organiza
4、tions represented on this committee can be obtained on request to its secretary.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 cannot confer immunity from legal obligations.
5、BS EN 60071-1:2006+A1:2010This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2006 BSI 2010Amendments/corrigenda issued since publicationDate Comments 30 April 2010 Implementation of IEC amendment 1:2010 with CENELEC endorsement A1:2010IS
6、BN 978 0 580 63234 1EUROPEAN STANDARD EN 60071-1:2006+A1 NORME EUROPENNE EUROPISCHE NORM February 2010 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart
7、 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 60071-1:1995English version Insulation co-ordination Part 1: Definitions, principles and rules (IEC 60071-1:200
8、6) 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/CENELEC Int
9、ernal 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 CENELEC
10、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 versions. CEN
11、ELEC 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, Sloveni
12、a, Spain, Sweden, Switzerland and the United Kingdom. Foreword The text of document 28/176/FDIS, future edition 8 of IEC 60071-1, prepared by IEC TC 28, Insulation co-ordination, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60071-1 on 2006-03-01. This European Sta
13、ndards 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 account clarification of the atmospheric and altitude corrections involved in the insulation co-ordination process;
14、 - 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 in 5.7, addition of 200 kV and 380 kV; - in the standard insulation levels for range I (1 kV 245 kV) (Table 3) re
15、placement 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 specified impulse withstand voltage in installation; - in Annex B, limitation at two Umvalues for the values of rat
16、ed insulation levels for 1 kV 245 kV)23 Table A.1 Correlation between standard rated lightning impulse withstand voltages and minimum air clearances31 Table A.2 Correlation between standard rated switching impulse withstand voltages and minimum phase-to-earth air clearances 32 Table A.3 Correlation
17、between standard rated switching impulse withstand voltages and minimum phase-to-phase air clearances .33 Table B.1- Values of rated insulation levels for 1kV 245 kV) !“Standard rated switching impulse withstand voltage Highest voltage for equipment Um kV (r.m.s. value) Longitudinal insulation a kV
18、(peak value) Phase-to-earthkV (peak value) Phase-to-phase(ratio to the phase-to-earth peak value) Standard rated lightning impulsewithstand voltage b kV (peak value) 850 750 750 1,50 950 950 300 c750 850 1,50 1 050 950 850 850 1,50 1 050 1 050 362 850 950 1,50 1 175 1 050 850 850 1,60 1 175 1 175 95
19、0 950 1,50 1 300 1 300 420 950 1050 1,50 1 425 1 175 950 950 1,70 1 300 1 300 950 1 050 1,60 1 425 1 425 550 950 1 050 1 175 1,50 1 550 1 675 1 175 1 300 1,70 1 800 1 800 1 175 1 425 1,70 1 950 1 950 800 1 175 1 300 1 550 1,60 2 100 1 950 1 425 d 2 100 2 100 1 425 1 550 1,70 2 250 2 250 1 550 1 675
20、1,65 2 400 2 400 1 100 1 675 1 800 1,6 2 550 BS EN 60071-1:2006+A1:2010EN 60071-1:2006+A1:2010 (E)Standard rated switching impulse withstand voltage Highest voltage for equipment Um kV (r.m.s. value) Longitudinal insulation a kV (peak value) Phase-to-earthkV (peak value) Phase-to-phase(ratio to the
21、phase-to-earth peak value) Standard rated lightning impulsewithstand voltage b kV (peak value) 2 100 1 550 1 675 1,70 2 250 2 250 1 675 1 800 1,65 2 400 2 550 1 200 1 800 1 950 1,60 2 700 aValue of the impulse voltage component of the relevant combined test while the peak value of the power-frequenc
22、y component of opposite polarity is Um 2 / 3. bThese 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-
23、frequency component of opposite polarity is 0,7 Um 2 / 3. cThis Umis a non-preferred value in IEC 60038. dThis value is only applicable to the phase-to-earth insulation of single phase equipment not exposed to air. Table 3 Standard insulation levels for range II (Um 245 kV) continued !“BS EN 60071-1
24、:2006+A1:2010EN 60071-1:2006+A1:2010 (E) 24 5.11 Background of the standard insulation levels 5.11.1 General The standard insulation levels 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 selec
25、tion of a particular standard insulation level should be based on the insulation co-ordination procedure in accordance with the insulation co-ordination procedure described in IEC 60071-2 (third edition) and should take into account the insulation characteristics of the particular equipment being co
26、nsidered. In range I, the standard rated short-duration power-frequency or the standard rated lightning impulse withstand voltage should cover 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
27、standard rated switching impulse withstand voltage should cover the required short-duration power-frequency withstand voltage if no value is required by the relevant apparatus committee. In order to meet these general requirements, the required withstand voltages should be converted to those voltage
28、 shapes for which standard rated withstand voltages are specified using test conversion factors. The test conversion factors are determined 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
29、 long-duration power-frequency test intended to demonstrate the response of the equipment with respect to ageing of internal insulation or to external pollution (see also IEC 60507). 5.11.2 Standard rated switching impulse withstand voltage In Table 3, standard rated switching impulse withstand volt
30、ages associated with each highest voltage for equipment have been chosen in consideration of the following: a) for equipment protected against switching overvoltages by surge arresters: the expected values of temporary overvoltages; the characteristics of presently available surge arresters; the co-
31、ordination and safety factors between the protective level of the surge arrester and the switching impulse withstand voltage of the equipment; b) for equipment not protected against switching overvoltages by surge arresters: the acceptable risk of disruptive discharge considering the probable range
32、of overvoltages occurring at the equipment location; the degree of overvoltage control generally deemed economical, and obtainable by careful 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 im
33、pulse withstand voltages associated with each standard rated switching impulse withstand voltage have been chosen in consideration of the following: BS EN 60071-1:2006+A1:2010EN 60071-1:2006+A1:2010 (E) 25 a) for equipment protected by close surge arresters, the low values of lighting impulse withst
34、and level are applicable. They are chosen by taking into account the 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
35、protected), only the higher values of lightning impulse withstand voltages 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 transformer
36、s, etc.). They are chosen in such a way that the insulation design will 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
37、 higher value shall be chosen from the series of standard values given 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 insula
38、tion is not lower than the corresponding specified withstand voltage. 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 standar
39、d situation (test arrangement specified by the relevant Apparatus Committees 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 perf
40、ormed under the conditions specified in IEC 60060-1. During wet tests, 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
41、corrected according to IEC 60060-1. All impulse withstand voltages shall 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 wi
42、thstand voltage, then it is sufficient to verify the withstand voltage 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 oc
43、currence of a failure and the method to detect it. When the standard 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 to
44、gether by connecting one of the two phase terminals to earth. BS EN 60071-1:2006+A1:2010EN 60071-1:2006+A1:2010 (E) 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
45、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
46、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
47、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
48、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
49、following test procedures which are standardized and fully described in IEC 60060-1: Three-impulse withstand voltage test in which no disruptive discharge is tolerated. Fifteen-impulse withstand voltage test in which up to two disruptive discharges on the self-restoring insulation are tolerated. Three-impulse withstand voltage test in which one disruptive discharge on the self-restoring insulation is tolerated. If this occurs, nine additional impulses are applied during which no disruptive discharge is tolerated. The up-and-down with
