1、BRITISH STANDARDBS EN 61071:2007Capacitors for power electronicsICS 31.060.70g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 61071:2007This Br
2、itish Standard was published under the authority of the Standards Policy and Strategy Committee on 29 February 2008 BSI 2008ISBN 978 0 580 55438 4National forewordThis British Standard is the UK implementation of EN 61071:2007. It is identical to IEC 61071:2007. It supersedes BS EN 61071-1:1997 and
3、BS EN 61071-2:1996, which are withdrawn.The UK participation in its preparation was entrusted to Technical Committee PEL/33, Power capacitors.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessa
4、ry provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. Amendments/corrigenda issued since publicationDate CommentsEUROPEAN STANDARD EN 61071 NORME EUROPENNE EUROPISCHE NORM April 2007 CENELEC Eu
5、ropean Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide
6、for CENELEC members. Ref. No. EN 61071:2007 E ICS 31.060.70 Supersedes EN 61071-1:1996 and EN 61071-2:1996English version Capacitors for power electronics (IEC 61071:2007) Condensateurs pour lectronique de puissance (CEI 61071:2007) Kondensatoren der Leistungselektronik (IEC 61071:2007) This Europea
7、n Standard was approved by CENELEC on 2007-04-01. 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 national standard without any alteration. Up-to-date lists and bibliographical references c
8、oncerning 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 in any other language made by translation under the responsibility of a CENELEC member i
9、nto 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, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ire
10、land, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 61071:2007 - 2 - Foreword The text of document 33/432/FDIS, future edition 1 of IEC 61071, prepared by IEC TC 33, Power cap
11、acitors, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61071 on 2007-04-01. This European Standard supersedes EN 61071-1:1996 and EN 61071-2:1996. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of
12、an identical national standard or by endorsement (dop) 2008-01-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2010-04-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61071:2007 was approved by C
13、ENELEC as a European Standard without any modification. _ 3 EN 61071:2007 CONTENTS 1 Scope 5 2 Normative references .6 3 Terms and definitions .6 4 Service conditions 11 4.1 Normal service conditions11 4.2 Unusual service conditions 12 5 Quality requirements and tests .12 5.1 Test requirements .12 5
14、.2 Classification of tests 13 5.3 Capacitance and tan measurements (routine test) .14 5.4 Measurement of the tangent of the loss angle (tan ) of a capacitor (type test) 14 5.5 Voltage test between terminals 15 5.6 AC voltage test between terminals and case 16 5.7 Test of internal discharge device .1
15、6 5.8 Sealing test .16 5.9 Surge discharge test .17 5.10 Thermal stability test .17 5.11 Self-healing test 18 5.12 Resonance frequency measurement 19 5.13 Environmental testing 19 5.14 Mechanical testing.19 5.15 Endurance test 20 5.16 Destruction test .22 5.17 Disconnecting test on internal fuses.27
16、 6 Overloads 29 6.1 Maximum permissible voltages 29 7 Safety requirements .30 7.1 Discharge device.30 7.2 Case connections30 7.3 Protection of the environment 30 7.4 Other safety requirements .30 8 Markings 31 8.1 Marking of the units.31 9 Guide to installation and operation31 9.1 General.31 9.2 Cho
17、ice of rated voltage32 9.3 Operating temperature.32 9.4 Special service conditions .33 9.5 Overvoltages.34 9.6 Overcurrents .34 9.7 Switching and protective devices .34 9.8 Choice of creepage distance and clearance .34 9.9 Connections 35 EN 61071:2007 - 4 - 9.10 Parallel connections of capacitors35
18、9.11 Series connections of capacitors .35 9.12 Magnetic losses and eddy currents 36 9.13 Guide for internal fuse and disconnector protection in capacitors .36 9.14 Guide for unprotected capacitors .36 Annex A (informative) Waveforms 37 Annex B (normative) Operational limits of capacitors with sinuso
19、idal voltages as a function of frequency and at maximum temperature (max) .39 Annex C (normative) Resonance frequency measuring methods Examples41 Annex ZA (normative) Normative references to international publications with their corresponding European publications .45 Bibliography .43 Figure 1 Dest
20、ruction test arrangement .24 Figure 2 N source d.c., type 1 26 Figure 3 N source d.c., type 2 26 Figure A.1 Example of waveforms and their circuits38 Figure B.1 Supply conditions39 Figure C.1 Measuring circuit 41 Figure C.2 Relation between the voltage across the capacitor and the supply frequency .
21、41 Figure C.3 Discharge current wave shape 42 Table 1 Test voltage between terminals .15 Table 2 Testing the robustness of terminals .20 Table 3 Endurance test21 Table 4 Destruction test as a function of type of safety system .22 Table 5 Maximum permissible voltages 29 5 EN 61071:2007 CAPACITORS FOR
22、 POWER ELECTRONICS 1 Scope This International Standard applies to capacitors for power electronics applications. The operating frequency of the systems in which these capacitors are used is usually up to 15kHz, while the pulse frequencies may be up to 5 to 10 times the operating frequency. The stand
23、ard distinguishes between a.c. and d.c. capacitors which are considered as components when mounted in enclosures. This standard covers an extremely wide range of capacitor technologies for numerous applications, e.g. overvoltage protection, d.c. and a.c. filtering, switching circuits, d.c. energy st
24、orage, auxiliary inverters, etc. The following are excluded from this standard: capacitors for induction heat-generating plants operating at frequencies between 40 Hz and 24 000 Hz (see IEC 60110-1 and IEC 60110-2); capacitors for motor applications and the like (see IEC 60252-1 and IEC 60252 -2); c
25、apacitors to be used in circuits for blocking one or more harmonics in power supply networks; small a.c. capacitors as used for fluorescent and discharge lamps (see IEC 61048 and IEC 61049); capacitors for suppression of radio interference (see IEC 60384-14); shunt capacitors for a.c. power systems
26、having a rated voltage above 1 000 V (see IEC 60871-1 and IEC 60871-2); shunt power capacitors of the self-healing type for a.c. systems having a rated voltage up to and including 1 000 V (see IEC 60831-1 and IEC 60831-2); shunt power capacitor of the non-self-healing type for a.c. systems having a
27、rated voltage up to and including 1 000 V (see IEC 60931-1 and IEC 60931-2); electronic capacitors not used in power circuits; series capacitors for power systems (see IEC 60143); coupling capacitors and capacitors dividers (see IEC 60358); capacitors for microwave ovens (see IEC 61270-1); capacitor
28、s for railway applications (see IEC 61881). Examples of applications are given in Clause 9.1. EN 61071:2007 - 6 - 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 refere
29、nces, the latest edition of the referenced document (including any amendments) applies. IEC 60068-2-6, Environmental testing Part 2: Tests. Test Fc: Vibration (sinusoidal) IEC 60068-2-14, Environmental testing Part 2: Tests. Test N: Change of temperature IEC 60068-2-20, Environmental testing Part 2:
30、 Tests. Test T: Soldering IEC 60068-2-21, Environmental testing Part 2: Tests. Test U: Robustness of terminations and integral mounting devices IEC 60068-2-78, Environmental testing Part 2: Tests. Test Cab: Damp heat, steady state IEC 60071-1, Insulation coordination Part 1: Definitions, principle a
31、nd rules IEC 60071-2, Insulation coordination Part 2: Application guide IEC 60269-1, Low-voltage fuses Part 1: General requirements IEC 60664-1, Insulation coordination for equipment within low-voltage systems Part 1: Principles, requirements and tests IEC 60695-2-11, Fire hazard testing Part 2-11:
32、Glowing/hotwire based test methods, Glow-wire flammability test method for end-products IEC 60695-2-12, Fire hazard testing Part 2-12: Glowing/hotwire based test methods, Glow-wire flammability test method for materials IEC 60947-1, Low-voltage switchgear and controlgear Part 1: General rules 3 Term
33、s and definitions For the purposes of this document, the following terms and definitions apply. 3.1 capacitor element (or element) a device consisting essentially of two electrodes separated by a dielectric IEV 436-01-03 3.2 capacitor unit (or unit) assembly of one or more capacitor elements in the
34、same container with terminals brought out IEV 436-01-04 3.3 capacitor bank number of capacitor units connected so as to act together IEV 436-01-06 7 EN 61071:2007 3.4 capacitor general term used when it is not necessary to state whether reference is made to an element, a unit or a capacitor bank 3.5
35、 capacitor equipment assembly of capacitor units and their accessories intended for connection in power electronic equipment 3.6 capacitor for power electronics power capacitor intended to be used in power electronic equipment and capable of operating continuously under sinusoidal and non-sinusoidal
36、 current and voltage 3.7 metal-foil capacitor (non-self-healing) capacitor in which the electrodes usually consist of metal foils separated by a dielectric NOTE In the event of a breakdown of the dielectric, the capacitor does not restore itself. 3.8 self-healing metallized dielectric capacitor capa
37、citor, of which at least one electrode consists of a metallic deposit on the dielectric NOTE In the event of local breakdown of the dielectric, the electric properties of the capacitor are rapidly and essentially self-restored. 3.9 a.c. capacitor capacitor essentially designed for operation with alt
38、ernating voltage NOTE AC capacitors may be used with d.c. voltage up to the rated voltage only when authorized by the capacitor manufacturer. 3.10 d.c. capacitor capacitor essentially designed for operation with direct voltage NOTE DC capacitors may be used with a specified a.c. voltage only where a
39、uthorized by the capacitor manufacturer. 3.11 model capacitor unit which simulates a complete unit or element in an electrical test, without reducing the severity of the electrical, thermal or mechanical conditions NOTE 1 The model unit may be of a different size from the complete unit. NOTE 2 The c
40、ombined sum of stresses should always be considered, for instance the sum of temperature and mechanical conditions as well as electrical stresses. 3.12 internal (element) fuse fuse connected inside a capacitor unit, in series with an element or a group of elements IEV 436-03-16 EN 61071:2007 - 8 - 3
41、.13 safety devices 3.13.1 overpressure disconnector disconnecting device inside a capacitor, designed to interrupt the current path in case of abnormal increase of internal overpressure 3.13.2 overpressure detector device designed to detect abnormal increase of the internal pressure, usually used to
42、 operate an electrical switch and indirectly interrupt the current path 3.13.3 segmented metallization design design of the metal layer over the dielectric shaped in a way to allow a small part of it to be isolated in case of local short circuit or breakdown, in order to restore the full functionali
43、ty of the unit with a negligible loss of capacitance 3.13.4 special unsegmented metallization design design of the metal layer over the dielectric shaped in a way that safe self-healing features operating at a voltage up to Us guarantee the full functionality of the unit with a negligible loss of ca
44、pacitance. 3.14 discharge device of a capacitor a device which may be incorporated in a capacitor, capable of reducing the voltage between the terminals practically to zero, within a given time, after the capacitor has been disconnected from a network IEV 436-03-15 modified 3.15 rated a.c. voltage U
45、Nmaximum operating peak recurrent voltage of either polarity of a reversing type waveform for which the capacitor has been designed NOTE 1 The waveform can have many shapes. Examples are given in Annex A. NOTE 2 The mean value of the waveform may be positive or negative. NOTE 3 It is important to no
46、te that the rated a.c. voltage is not an r.m.s. value. 3.16 rated d.c. voltage UNDCmaximum operating peak voltage of either polarity but of a non-reversing type waveform, for which the capacitor has been designed, for continuous operation NOTE 1 Damping capacitors, for gate turn-off thyristor (GTO)
47、can be regarded as d.c. capacitors with a ripple voltage equal to the rated d.c. voltage UNDC= Ur. In the case of reversal voltage (Urev), the use should be agreed between user and manufacturer. NOTE 2 If the reversal voltage is small (less than 10 %), the voltage waveform can be considered to be no
48、n- reversing. For test purposes, UNDCand Urshould be increased by Urev, the reversal voltage. 3.17 ripple voltage Urpeak-to-peak alternating component of the unidirectional voltage 9 EN 61071:2007 3.18 non-recurrent surge voltage Uspeak voltage induced by a switching or any other disturbance of the
49、system which is allowed for a limited number of times and for durations shorter than the basic period 3.19 insulation voltage Uir.m.s. value of the sine wave voltage designed for the insulation between terminals of capacitors to case or earth 3.20 maximum peak current maximum repetitive peak current that can occur during continuous operation 3.21 maximum current Imaxmaximum r.m.s. current for continuous operation 3.22 maximum surge current speak non-re
