1、Electrical safety in low voltagedistribution systems up to 1 000 V a.c. and 1 500 V d.c. Equipment for testing, measuringor monitoring of protective measures Part 11: Effectiveness of residual current monitors (RCMs)type A and type B in TT, TN and IT systemsBS EN 61557-11:2009raising standards world
2、wideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsNational forewordThis British Standard is the UK implementation of EN 61557-11:2009. It isidentical to IEC 61557-11:2009.The UK participation in its preparation was entrusted to Technical CommitteePEL/85,
3、Measuring equipment for electrical and electromagnetic quantities.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application
4、. BSI 2009ISBN 978 0 580 58116 8ICS 17.220.20; 29.080.01; 29.240.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 30 April 2009Amendments issued since publication
5、Amd. No. Date Text affectedBRITISH STANDARDBS EN 61557-11:2009EUROPEAN STANDARD EN 61557-11 NORME EUROPENNE EUROPISCHE NORM March 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Cent
6、ral Secretariat: avenue Marnix 17, B - 1000 Brussels 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61557-11:2009 E ICS 17.220.20; 29.080.01; 29.240.01 English version Electrical safety in low voltage distribution systems up
7、 to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 11: Effectiveness of residual current monitors (RCMs) type A and type B in TT, TN and IT systems (IEC 61557-11:2009) Scurit lectrique dans les rseaux de distribution basse tension de 1 00
8、0 V c.a. et 1 500 V c.c. - Dispositifs de contrle, de mesure ou de surveillance de mesures de protection -Partie 11: Efficacit des contrleurs disolement courant diffrentiel rsiduel (RCM) de type A et de type B dans les rseaux TT, TN et IT (CEI 61557-11:2009) Elektrische Sicherheit in Niederspannungs
9、netzen bis AC 1 000 V und DC 1 500 V - Gerte zum Prfen, Messen oder berwachen von Schutzmanahmen - Teil 11: Wirksamkeit von Differenzstrom-berwachungsgerten (RCMs) Typ A und Typ B in TT-, TN- und IT-Systemen (IEC 61557-11:2009) This European Standard was approved by CENELEC on 2009-02-01. CENELEC me
10、mbers 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 concerning such national standards may be obtained on applica
11、tion 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 into its own language and notified to the Central Secretariat
12、 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, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Nethe
13、rlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 61557-11:2009EN 61557-11:2009 - 2 - Foreword The text of document 85/338/FDIS, future edition 1 of IEC 61557-11, prepared by IEC TC 85, Measuring equipment for electrical and elect
14、romagnetic quantities, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61557-11 on 2009-02-01. This standard is to be used in conjunction with EN 61557-1:2007. The following dates were fixed: latest date by which the EN has to be implemented at national level by publ
15、ication of an identical national standard or by endorsement (dop) 2009-11-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2012-02-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61557-11:2009 was
16、 approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60364-4-41 NOTE Harmonized as HD 60364-4-41:2007 (modified). IEC 60364-5-53 NOTE Clause 534 (in IEC/A1:2002) harmoniz
17、ed as HD 60364-5-534:2008 (modified). IEC 60364-6 NOTE Harmonized as HD 60364-6:2007 (modified). IEC 60947-2 NOTE Harmonized as EN 60947-2:2006 (not modified). IEC 61008-1 NOTE Harmonized as EN 61008-1:2004 (modified). _ BS EN 61557-11:2009- 3 - EN 61557-11:2009 Annex ZA (normative) Normative refere
18、nces to international publications with their corresponding European publications The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (in
19、cluding any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC/TR 60755 2008 General requirements for residual current operated protective devices - - IEC 61010-1
20、 2001 Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 1: General requirements EN 61010-1 + corr. June 2001 2002 IEC 61326-2-2 - 1)Electrical equipment for measurement, control and laboratory use - EMC requirements - Part 2-2: Particular requirements -
21、 Test configurations, operational conditions and performance criteria for portable test, measuring and monitoring equipment used in low-voltage distribution systems EN 61326-2-2 2006 2)IEC 61557-1 - 1)Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipme
22、nt for testing, measuring or monitoring of protective measures - Part 1: General requirements EN 61557-1 2007 2)IEC 61557-6 - 1)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 6:
23、Effectiveness of residual current devices (RCD) in TT, TN and IT systems EN 61557-6 2007 2)IEC 62020 1998 Electrical accessories - Residual current monitors for household and similar uses (RCMs) EN 62020 1998 1)Undated reference. 2)Valid edition at date of issue. BS EN 61557-11:2009 2 61557-11 IEC:2
24、009 CONTENTS 1 Scope.5 2 Normative references5 3 Terms and definitions .5 4 Requirements .7 4.1 Operating test7 4.2 Non-operating test .8 4.3 Test of actuating time 8 4.4 Operating conditions8 4.5 Prevention of danger by fault voltages exceeding 50 V a.c. or 120 V d.c. in the monitored system during
25、 measurement8 4.6 Prevention of danger caused by overvoltages when the system is connected9 4.7 Electromagnetic compatibility (EMC)9 5 Marking and operating instructions9 5.1 Markings .9 5.2 Operating instructions9 5.2.1 Information 9 5.2.2 Warnings.9 6 Tests 10 6.1 General .10 6.2 Operating uncerta
26、inty.10 Annex A (informative) Differences between RCMs and RCDs .14 Annex B (informative) Safety aspects, test methods and applications18 Bibliography20 Figure 1 Maximum steepness of stepwise rising smooth direct test current (IT) .12 Figure 2 Maximum increase of linearly increasing smooth direct te
27、st current (IT).12 Figure 3 Example for linearly increasing smooth direct test current (IT): IN = 30 mA 13 Figure A.1 Typical installation with a combination of RCDs and RCMs 17 Table 1 Calculation of operating uncertainty .11 Table A.1 Normative reference and definition of function of RCM and RCD .
28、14 Table A.2 Requirements for testing RCMs according to product standard IEC 62020:1998 15 Table A.3 Main technical differences between RCMs and RCDs .16 BS EN 61557-11:200961557-11 IEC:2009 5 ELECTRICAL SAFETY IN LOW VOLTAGE DISTRIBUTION SYSTEMS UP TO 1 000 V a.c. AND 1 500 V d.c. EQUIPMENT FOR TES
29、TING, MEASURING OR MONITORING OF PROTECTIVE MEASURES Part 11: Effectiveness of residual current monitors (RCMs) type A and type B in TT, TN and IT systems 1 Scope This part of IEC 61557 specifies the requirements for testing equipment applied to the testing of the effectiveness of residual current m
30、onitors (RCMs) of type A and type B, which are already installed in distribution systems. This test equipment can be used in any kind of network like a TN, TT or IT system. The test equipment may also be used for testing directionally discriminating RCMs in IT-Systems. 2 Normative references The fol
31、lowing referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC/TR 60755:2008, General requirements for residual cur
32、rent operated protective devices IEC 61010-1:2001, Safety requirements for electrical equipment for measurement, control, and laboratory use Part 1: General requirements IEC 61326-2-2, Electrical equipment for measurement, control and laboratory use EMC requirements Part 2-2: Particular requirements
33、 Test configurations, operational conditions and performance criteria for portable test, measuring and monitoring equipment used in low-voltage distribution systems IEC 61557-1, Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. Equipment for testing, measuring
34、 or monitoring of protective measures Part 1: General requirements IEC 61557-6, 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 6: Effectiveness of residual current devices (RCD) in T
35、T, TN and IT systems IEC 62020:1998, Electrical accessories Residual current monitors for household and similar uses (RCMs) 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 61557-1, IEC 61557-6 and the following apply. BS EN 61557-11:2009 6 61557-11 I
36、EC:2009 3.1 residual current monitor (RCM) device or association of devices which monitors the residual current in an electrical installation and which activates an alarm when the residual current exceeds the operating value of the device IEC 62020, definition 3.3.1 3.2 earth fault current Iecurrent
37、 flowing to earth due to an insulation fault IEC 62020, definition 3.1.1 3.3 test current ITtest current superimposed by the test equipment for testing the effectiveness of the RCM 3.4 residual current Ivector sum of the instantaneous values of the current flowing in the main circuit of the RCM (exp
38、ressed as r.m.s. value) IEC 62020, definition 3.2.3 3.5 rated residual operating current INvalue of residual current assigned by the manufacturer which causes the RCM to operate under specified conditions IEC 62020, definitions 3.2.4 and 3.4.1 combined 3.6 residual operating current Iovalue of resid
39、ual current which causes the RCM to operate under specified conditions IEC 62020, definition 3.2.4 3.7 residual non-operating current Inovalue of residual current at which and below which the RCM does not operate under specified conditions IEC 62020, definition 3.2.5 3.8 actuating time tatime taken
40、for a RCM to change from the non-alarm state to the alarm state in response to the sudden appearance of a residual current which exceeds the preset level IEC 62020, definition 3.3.12 BS EN 61557-11:200961557-11 IEC:2009 7 3.9 residual current monitor (RCM) type A RCM for which monitoring is ensured
41、for residual sinusoidal alternating currents and residual pulsating direct currents, whether suddenly applied or slowly rising IEC 62020, definition 3.3.8, modified 3.10 residual current monitor (RCM) type B RCM for which monitoring is ensured for residual sinusoidal alternating currents, with resid
42、ual pulsating direct currents and smooth residual direct currents independent of polarity, whether suddenly applied or slowly rising IEC/TR 60755, definition 5.2.9.3, modified 4 Requirements The following requirements as well as those given in IEC 61557-1 shall apply. 4.1 Operating test The testing
43、equipment shall be capable of verifying that the residual operating current of a RCM type A tested with an a.c. test current is lower or equal to the value of the rated residual operating current. Testing of RCMs type A shall be conducted with a suddenly applied calibrated a.c. current at zero cross
44、ing. The tests shall be carried out with a sinusoidal, or mains-derived quasi sinusoidal, test current. If the test equipment is capable of producing half-wave test currents, testing of residual current monitors (RCMs) type A may be carried out alternatively with half-wave test currents and/or a.c.
45、current with superimposed 6 mA d.c. according to IEC 62020. In case of pulsed d.c. current, the test equipment shall be capable of testing in both polarities. When testing RCMs of type B with a d.c. test current, it shall be verified that the residual operating current is lower or equal to 2 times t
46、he value of the rated residual operating current. Testing of RCMs type B shall be conducted separately with a suddenly applied, calibrated a.c. current and a continuously rising smooth direct current. The steepness of the continuous rate of rising shall not be higher than 2 IN/ 5 s. If the continuou
47、s rate of rising is simulated by a stepwise or linearly increasing test current, the increase shall not be higher than 2 IN/ 30 (see Figures 1 to 3). In both cases the starting current shall be below 0,2 IN. The operating uncertainty of the increasing test current IT shall not exceed 10 % of the rat
48、ed residual operating current IN.The operating uncertainty of the calibrated test current ITshall not exceed 0 % to +10 %. The test period shall be adapted to the set actuating time of the RCM and it shall be possible to extend the test period up to 10 s. BS EN 61557-11:2009 8 61557-11 IEC:2009 4.2
49、Non-operating test When a test at 50 % or less of the rated residual operating current to test the reliability of the RCM is included, the minimum test period shall be 10 s. The alarm shall not be activated. When a non-operating test at 50 % or less of the rated residual operating current is included, the operating uncertainty of the calibrated test current shall not exceed 0 % to 10 % of the specified non-operati
