1、BSI Standards PublicationShunt power capacitors of the self-healing type for a.c. systems having a rated voltage up to and including 1 000 VPart 2: Ageing test, self-healing test and destruction testBS EN 60831-2:2014National forewordThis British Standard is the UK implementation of EN 60831-2:2014.
2、 It is identical to IEC 60831-2:2014. It supersedes BS EN 60831-2:1996which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PEL/33, Power capacitors.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publicat
3、ion does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 74811 0ICS 29.120.99; 31.060.70Compliance with a British Standard cannot confer i
4、mmunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 June 2014.Amendments/corrigenda issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60831-2:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE
5、NORM EN 60831-2 June 2014 ICS 29.120.99; 31.060.70 Supersedes EN 60831-2:1996 English Version Shunt power capacitors of the self-healing type for a.c. systems having a rated voltage up to and including 1 000 V - Part 2: Ageing test, self-healing test and destruction test (IEC 60831-2:2014) Condensat
6、eurs shunt de puissance autorgnrateurs pour rseaux courant alternatif de tension assigne infrieure ou gale 1 000 V - Partie 2: Essais de vieillissement, dautorgnration et de destruction (CEI 60831-2:2014) Selbstheilende Leistungs-Parallelkondensatoren fr Wechselstromanlagen mit einer Bemessungsspann
7、ung bis 1 000 V - Teil 2: Alterungsprfung, Selbstheilungsprfung und Zerstrungsprfung (IEC 60831-2:2014) This European Standard was approved by CENELEC on 2014-03-19. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
8、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 CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions
9、 (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 CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committ
10、ees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slo
11、venia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CENELEC All
12、 rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 60831-2:2014 E BS EN 60831-2:2014EN 60831-2:2014 - 2 - Foreword The text of document 33/544/FDIS, future edition 3 of IEC 60831-2, prepared by IEC/TC 33, “Power capacitors and their applications“
13、 was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60831-2:2014. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2014-12-19 latest date by whic
14、h the national standards conflicting with the document have to be withdrawn (dow) 2017-03-19 This document supersedes EN 60831-2:1996. EN 60831-2:2014 includes the following significant technical changes with respect to EN 60831-2:1996: a) Updating of the normative references; b) Discharge cycles be
15、fore ageing test carried out at ambient temperature; c) Alternative Self-healing test at d.c. voltage; d) Modified acceptance conditions after Self-healing test; e) Modifications to Destruction test. Attention is drawn to the possibility that some of the elements of this document may be the subject
16、of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC). Endorsement notice The te
17、xt of the International Standard IEC 60831-2:2014 was approved by CENELEC as a European Standard without any modification. BS EN 60831-2:2014- 3 - EN 60831-2:2014 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following docu
18、ments, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE 1 When an Internatio
19、nal Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu Publication Year Title EN/HD Year IEC 60831-1 2014 Shunt po
20、wer capacitors of the self-healing type for a.c. systems having a rated voltage up to and including 1000 V - Part 1: General - Performance, testing and rating - Safety requirements - Guide for installation and operation EN 60831-1 2014 BS EN 60831-2:2014 2 60831-2 IEC:2014 CONTENTS 1 Scope 5 2 Norma
21、tive references 5 17 Ageing test 6 17.1 Conditioning . 6 17.1.1 General 6 17.1.2 Testing in air with forced circulation 6 17.1.3 Testing in a liquid bath . 6 17.2 Test sequence . 7 17.3 Test requirements 7 18 Self-healing test 8 19 Destruction test . 8 19.1 Test sequence . 8 19.2 Test requirements 1
22、0 Annex A (informative) Self-healing breakdown test equipment that may be used . 11 Figure 1 Circuit to perform the destruction test 9 Figure A.1 Example of self-healing detection equipment 11 BS EN 60831-2:201460831-2 IEC:2014 5 SHUNT POWER CAPACITORS OF THE SELF-HEALING TYPE FOR A.C. SYSTEMS HAVIN
23、G A RATED VOLTAGE UP TO AND INCLUDING 1 000 V Part 2: Ageing test, self-healing test and destruction test 1 Scope This part of IEC 60831 applies to capacitors according to IEC 60831-1 and gives the requirements for the ageing test, self-healing test and destruction test for these capacitors. NOTE Th
24、e numbering of the clauses and subclauses in this standard corresponds to that of IEC 60831-1. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited appl
25、ies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60831-1:2014, Shunt power capacitors of the self-healing type for a.c. systems having a rated voltage up to and including 1 000 V Part 1: General Performance, testing and rating Safety
26、requirements Guide for installation and operation BS EN 60831-2:2014 6 60831-2 IEC:2014 17 Ageing test 17.1 Conditioning 17.1.1 General The temperature of the case during the first part (17.2a) and the third part (17.2c) of the ageing test shall be the highest mean temperature in 24 h (see Table 1,
27、IEC 60831-1:2014) plus the difference between the measured temperature of the case and the cooling air temperature recorded at the end of the thermal stability test carried out on an identical unit. The second part (17.2b) of the ageing test should be performed at room temperature. The two test meth
28、ods indicated below are intended to ensure that the capacitor case temperature is maintained constant during the test. The two methods are considered as being equivalent. The units that are not sealed shall be tested in air, with forced circulation. 17.1.2 Testing in air with forced circulation The
29、capacitor unit is mounted in an enclosure in which heated air is circulated with an air velocity such that temperature variations at any point of the enclosure do not exceed 2 C. The sensitive element of the thermostat regulating the temperature in the capacitor enclosure shall be located on the sur
30、face of the capacitor container, three-quarters of the way up. The capacitor shall be placed in a vertical position with the terminals upright. When many capacitors are tested together, they shall be placed with sufficient clearance between them in order to have sufficient temperature uniformity. Af
31、ter placing the capacitor in the unheated enclosure, the thermostat shall be set at a tempe-rature equal to that indicated in 17.1.1. Then, without energizing the capacitor, the enclosure shall be brought to thermal stability, which shall be deemed to have been reached when the container temperature
32、 of the capacitor has reached the stated temperature with a tolerance of 2 C. The capacitor shall then be energized at the voltage stated in 17.2a). 17.1.3 Testing in a liquid bath The capacitor unit is immersed in a container filled with a liquid which, by appropriate heating, is kept at the temper
33、ature indicated in 17.1.1 during the whole test. This temperature is maintained with a permissible change of 2 C. Care shall be taken to ensure that the temperature in the neighbourhood of the capacitor is within these limits. The capacitor is not energized until it has reached the temperature of th
34、e liquid bath. The capacitor shall then be energized at the voltage stated in 17.2a). Where the terminal insulation, or the insulation of cables permanently attached to the capacitor, is of material that might be damaged by the heating liquid, it is permissible for the BS EN 60831-2:201460831-2 IEC:
35、2014 7 capacitors to be positioned in such a manner that these terminals or cables are just above the surface of the liquid. 17.2 Test sequence Before the test, the capacitance shall be measured as prescribed in 7.1 of IEC 60831-1:2014. The test sequence is in three parts as follows: a) The capacito
36、r shall be energized at a voltage equal to 1,25 UNfor 750 h. Taking the tolerances of the supply voltage into account, this test voltage shall be the average voltage for the whole test duration. b) The capacitor shall then be subjected to 1 000 discharge cycles consisting of: charging the capacitor
37、to a d.c. voltage of 2 UN; discharging the capacitor through an inductance of: %200001=CL in microhenry (H) in which C is the measured capacitance in microfarads (F). The cables used for the external circuit and the inductance shall have a cross-section appropriate to the maximum permissible current
38、 (see Clause 21 of IEC 60831-1:2014). The duration of each cycle shall be 30 s minimum. The connection for this part of the test shall be as described in Clause 16 of IEC 60831-1:2014. c) Repetition of item a). During the whole test sequence the temperature of the case shall be maintained equal to t
39、hat indicated in 17.1.1. In the case of three-phase capacitors, the first and the third parts of the test sequence (items a) and c) shall be carried out with all the phases energized at 1,25 UN. This can be obtained either by using a three-phase source, or by using a monophase source and modifying t
40、he internal capacitor connections. Due to long duration of this test, voltage interruptions may occur unexpectedly. During these interruptions, the capacitor units shall remain in the same test setup and the test time is also interrupted. If power is interrupted to the heating enclosure, the ageing
41、test shall resume with the same starting conditions as described in 17.1.2 or 17.1.3. 17.3 Test requirements During the test no permanent breakdown, open circuit or flashover shall occur. At the end of the test the capacitor shall cool down freely to the ambient temperature and the capacitance shall
42、 then be measured under the same conditions as before the test. The maximum permitted variation of capacitance compared to the values measured before the test shall be 3 % averaged over all the phases and 5 % on one phase. The voltage test between terminals and container shall be carried out with th
43、e same pro-cedures as prescribed in 10.1 of IEC 60831-1:2014. The sealing test shall be repeated as prescribed in Clause 12 of IEC 60831-1:2014. BS EN 60831-2:2014 8 60831-2 IEC:2014 18 Self-healing test This test may be carried out on a complete unit, or on a separate element or on a group of eleme
44、nts that are a part of the unit, provided the element or the elements under test are identical to those used in the unit and their conditions are similar to those they have in the unit. The choice is left to the manufacturer. The capacitor or element shall be subjected for 10 s to an a.c. voltage of
45、 2,15 UNor to a d.c. voltage of 3,04 UN(2,15 UNa.c. peak value). If fewer than five breakdowns occur during this time, the voltage shall be increased slowly until five breakdowns have occurred since the beginning of the test or until the voltage has reached 3,5 UNin a.c or 4,95 UNin d.c. If fewer th
46、an five breakdowns have occurred when the voltage has reached the above stated voltage limit for a time of 10 s, the test shall be finished, if at least one clearing has occurred. If no breakdown has occurred, the test may be continued until at least one breakdown is obtained or may be interrupted a
47、nd repeated on another identical unit or element, at the choice of the manufacturer. Before and after the test, the capacitance and tan shall be measured. No change of the capacitance equal/higher than 0,5 % shall be permitted. The following formula shall be checked: tan 1,1 tan 0+ 1 104, (at 50 or
48、60 Hz) Where tan is the value after the test and tan 0is the value before the test. NOTE 1 Breakdown during the test may be detected by an oscilloscope or by an acoustic or a high-frequency test method. In particular, self-healing breakdown test equipment as shown in Annex A could be used. NOTE 2 Th
49、e test carried out on a part of a unit can facilitate the detection of self-healing breakdown. For polyphase capacitors, the test voltages should be adjusted accordingly. When comparing the results of capacitance and tan measurement obtained before and after the test, two factors should be taken into account: a) the reproducibility of the measurement; b) the fact that an internal change in the dielectric may cause a small change in the capacitance without detrime
