1、 INTERNATIONAL STANDARD IECCEINORME INTERNATIONALE61557-6Second editionDeuxime dition2007-07Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. Equipment for testing, measuring or monitoring of protective measures Part 6: Effectiveness of residual current devices
2、(RCD) in TT, TN and IT systems Scurit lectrique dans les rseaux de distribution basse tension de 1 000 V c.a. et 1 500 V c.c. Dispositifs de contrle, de mesure ou de surveillance de mesures de protection Partie 6: Efficacit des dispositifs courant rsiduel (DCR) dans les rseaux TT, TN et IT Reference
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15、sitez le FAQ du Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 INTERNATIONAL STANDARD IECCEINORME INTERNATIONALE61557-6Second editionDeuxime dition2007-07Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. Equipment
16、 for testing, measuring or monitoring of protective measures Part 6: Effectiveness of residual current devices (RCD) in TT, TN and IT systems Scurit lectrique dans les rseaux de distribution basse tension de 1 000 V c.a. et 1 500 V c.c. Dispositifs de contrle, de mesure ou de surveillance de mesures
17、 de protection Partie 6: Efficacit des dispositifs courant rsiduel (DCR) dans les rseaux TT, TN et IT M Commission Electrotechnique InternationaleInternational Electrotechnical Commission PRICE CODE CODE PRIX For price, see current cataloguePour prix, voir catalogue en vigueur 2 61557-6 IEC:2007 CON
18、TENTS FOREWORD.3 1 Scope.5 2 Normative references5 3 Terms and definitions .5 4 Requirements .6 5 Marking and operating instructions9 5.1 Marking .9 5.2 Operating instructions9 6 Tests 9 Annex A (normative) Measuring equipment for residual current protective devices (RCDs) of type B.11 Bibliography1
19、3 Table 1 Calculation of operating uncertainty .7 61557-6 IEC:2007 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRICAL SAFETY IN LOW VOLTAGE DISTRIBUTION SYSTEMS UP TO 1000 V a.c. AND 1500 V d.c. EQUIPMENT FOR TESTING, MEASURING OR MONITORING OF PROTECTIVE MEASURES Part 6: Effectiveness of resi
20、dual current devices (RCD) in TT, TN and IT systems FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operatio
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29、any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may
30、 be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61557-6 has been prepared by IEC technical committee 85: Measuring equipment for electrical and electromagnetic quantities. This second edition cancels and re
31、places the first edition published in 1997. This edition constitutes a technical revision. The following changes were made with respect to the previous edition (1997): a) title and scope complemented; b) definitions complemented; c) revision of requirements; d) “tripping tests” and “non-tripping tes
32、ts” subclauses complemented; 4 61557-6 IEC:2007 e) markings complemented; f) addition of Annex A. The text of this standard is based on the following documents: Enquiry draft Report on voting 85/279A/CDV 85/298/RVC Full information on the voting for the approval of this standard can be found in the
33、report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. This part of IEC 61557 shall be used in conjunction with Part 1. A list of all parts of the IEC 61557 series, published under the general title Electrical safety in low
34、 voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. Equipment for testing, measuring or monitoring of protective measures, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated
35、on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 61557-6 IEC:2007 5 ELECTRICAL SAFETY IN LOW VOLTAGE DISTRIBUTION SYSTEMS UP TO 1000 V a.c. AND 1
36、500 V d.c. EQUIPMENT FOR TESTING, MEASURING OR MONITORING OF PROTECTIVE MEASURES Part 6: Effectiveness of residual current devices (RCD) in TT, TN and IT systems 1 Scope This part of IEC 61557 specifies the requirements for measuring equipment applied to the testing of the effectiveness of protectiv
37、e measures by regular disconnections of residual current protective devices (RCD) in TT, TN and IT systems. 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 references,
38、the latest edition of the referenced document (including any amendments) applies. IEC/TR 60755, General requirements for residual current operated protective devices IEC 60947-2, Low-voltage switchgear and controlgear Part 2: Circuit-breakers IEC 61008 (all parts), Residual current operated circuit-
39、breakers without integral overcurrent protection for household and similar uses (RCCBs) IEC 61009 (all parts), Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs) IEC 61010-1:2001, Safety requirements for electrical equipment for mea
40、surement, control, and laboratory use Part 1: General requirements IEC 61557-1:2007, Electrical safety in low voltage distribution systems up to 1 000 V a.c and 1 500 V d.c Equipment for testing, measuring or monitoring of protective measures Part 1: General requirements 3 Terms and definitions For
41、the purposes of this document, the definitions given in IEC 61557-1 and the following definitions apply. 3.1 fault current I current flowing to earth due to an insulation fault 6 61557-6 IEC:2007 3.2 rated residual operating current INfault current for which the residual current protective device is
42、 designed 3.3 residual operating current Iafault current at which the residual current protective device is activated 3.4 test resistance Rpresistance by means of which a fault current for test purposes is produced 3.5 total earthing resistance RAresistance between the main earthing terminal and the
43、 earth IEV 826-04-031) 4 Requirements The following requirements as well as those given in IEC 61557-1 shall apply. 4.1 Tests 4.1.1 Tripping tests The measuring equipment shall be capable of indicating that the residual operating current of the protective device is less than or equal to the rated re
44、sidual operating current. The tests shall be carried out with a sinusoidal, or mains-derived quasi sinusoidal test current. The operating uncertainty of the calibrated test currents shall not exceed 0 % to +10 % of the rated residual current with the rated residual operating current as fiducial valu
45、e determined in accordance with Table 1. The operating uncertainty of measurement of the residual operating current shall not exceed 10 % of the rated residual operating current as fiducial value determined in accordance with Table 1. If the measuring equipment is provided for the purpose of testing
46、 residual current protective devices of 30 mA or below, installed for supplementary protection, the measuring equipment shall be capable of providing a test of five times the rated residual operating current. The test period shall be limited to 40 ms. When measuring the trip time, this limit of test
47、 period need not be applied so long as the fault voltage remains below the touch voltage limit. If the measuring equipment is capable of producing half-wave test currents, testing of residual current protective devices (RCDs) Type A may alternatively be carried out using half-wave test currents acco
48、rding to the IEC 61008 and IEC 61009 series, IEC 60947-2 and IEC/TR 60755. In this case test equipment shall be able to test in both polarities. 1)IEC 60050-826:1982, International Electrotechnical Vocabulary Part 826: Electrical installations of buildings (withdrawn and superseded by IEC 60050-826:
49、2004, International Electrotechnical Vocabulary Part 826: Electrical installations, in which this definition no longer appears). 61557-6 IEC:2007 7 Table 1 Calculation of operating uncertainty Intrinsic uncertainty or influence quantity Reference conditions or specified operating range Designationcode Requirements or test in accordance with
