1、BRITISH STANDARDBS EN 61557-6:2007Electrical 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 TT, TN and IT systemsThe European Standard EN 6
2、1557-6:2007 has the status of a British StandardICS 17.220.20; 29.080.01; 29.240.01g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 61557-6:200
3、7This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 December 2007 BSI 2007ISBN 978 0 580 54796 6National forewordThis British Standard is the UK implementation of EN 61557-6:2007. It is identical to IEC 61557-6:2007. It supersedes BS EN 61557
4、-6:1998, which will be withdrawn on 1 October 2010.The UK participation in its preparation was entrusted to Technical Committee PEL/85, Measuring equipment for electrical and electromagnetic quantities.A list of organizations represented on this committee can be obtained on request to its secretary.
5、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.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARD EN 61
6、557-6 NORME EUROPENNE EUROPISCHE NORM November 2007 CENELEC European 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
7、 exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61557-6:2007 E ICS 17.220.20; 29.080.01; 29.240.01 Supersedes EN 61557-6:1998English version Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testin
8、g, measuring or monitoring of protective measures - Part 6: Effectiveness of residual current devices (RCD) in TT, TN and IT systems (IEC 61557-6:2007) 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 surveillanc
9、e de mesures de protection - Partie 6: Efficacit des dispositifs courant rsiduel (DCR) dans les rseaux TT, TN et IT (CEI 61557-6:2007) Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V - Gerte zum Prfen, Messen oder berwachen von Schutzmanahmen - Teil 6: Wirksamkeit von F
10、ehlerstrom-Schutzeinrichtungen (RCD) in TT-, TN- und IT-Systemen (IEC 61557-6:2007) This European Standard was approved by CENELEC on 2007-10-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status
11、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 member. This European Standard exists in three official versions (English, French, German). A
12、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. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cypru
13、s, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 61557-6:2007 2 Foreword The
14、 text of document 85/279A/CDV, future edition 2 of IEC 61557-6, prepared by IEC TC 85, Measuring equipment for electrical and electromagnetic quantities, was submitted to the IEC-CENELEC parallel Unique Acceptance Procedure and was approved by CENELEC as EN 61557-6 on 2007-10-01. This European Stand
15、ard supersedes EN 61557-6:1998. The following changes were made with respect to EN 61557-6:1998: title and scope complemented; definitions complemented; revision of requirements; “tripping tests“ and “non-tripping tests“ subclauses complemented; “operating instructions“ subclause complemented; addit
16、ion of Annex A. This standard is to be used in conjunction with EN 61557-1. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2008-07-01 latest date by which the national standa
17、rds conflicting with the EN have to be withdrawn (dow) 2010-10-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61557-6:2007 was approved by CENELEC as a European Standard without any modification. _ 3 EN 61557-6:2007 CONTENTS 1 Scope 4 2 Normati
18、ve references .4 3 Terms and definitions .4 4 Requirements.5 5 Marking and operating instructions .8 5.1 Marking.8 5.2 Operating instructions .8 6 Tests8 Annex A (normative) Measuring equipment for residual current protective devices (RCDs) of type B 10 Annex ZA (normative) Normative references to i
19、nternational publications with their corresponding European publications .13 Bibliography .12 Table 1 Calculation of operating uncertainty.6 EN 61557-6:2007 4 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 PRO
20、TECTIVE 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 protective measures by regular disconnections of residual current protect
21、ive 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, the latest edition of the referenced document (including any ame
22、ndments) 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-breakers without integral overcurrent protection for household a
23、nd 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 measurement, control, and laboratory use Part 1: General requiremen
24、ts 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 the purposes of this document, the definitions given in IEC 6155
25、7-1 and the following definitions apply. 3.1 fault current I current flowing to earth due to an insulation fault 5 EN 61557-6:2007 3.2 rated residual operating current INfault current for which the residual current protective device is designed 3.3 residual operating current Iafault current at which
26、 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 earth IEV 826-04-031) 4 Requirements The following requirements
27、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 residual operating current. The tests shall be carried out with a s
28、inusoidal, 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 value determined in accordance with Table 1. The operating uncertaint
29、y 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 residual current protective devices of 30 mA or below, installed
30、 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 period need not be applied so long as the fault voltage remains
31、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 according to the IEC 61008 and IEC 61009 series, IEC 60947-2 and IEC/
32、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 60050-826:2004, International Electrotechnical Vocabulary Part 826: Electri
33、cal installations, in which this definition no longer appears). EN 61557-6:2007 6 Table 1 Calculation of operating uncertainty Intrinsic uncertainty or influence quantity Reference conditions or specified operating range Designationcode Requirements or test in accordance with the relevant parts of I
34、EC 61557 Type of test Intrinsic uncertainty Reference conditions A Part 6, 6.1 R Position Reference position 90 E1Part 1, 4.2 R Supply voltage At the limits stated by the manufacturer E2Part 1, 4.2, 4.3 R Temperature 0 C and 35 C E3Part 1, 4.2 T Resistance of the probes Within the limits stated by t
35、he manufacturer E5Part 6, 4.5 T System voltage 85 % to 110 % of the nominal voltage E8Part 6, 4.5 T Operating uncertainty BA EEEEE= + + + + +(1,15 )1222325282Part 6, 4.1 Part 6, 4.2 Part 6, 4.3 R A = intrinsic uncertainty En= variations R = routine test T = type test % 100 = % value fiducialBB 4.1.2
36、 Non-tripping tests When a test at 50 % or less of the rated residual operating current to test the reliability of the RCD is included, the minimum test period for general type RCDs shall be 0,3 s and for type S RCDs it shall be 0,5 s. The protective device shall not open. When a no trip test at 50
37、% 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 no tripping test current in accordance with Table 1. NOTE If the purpose of the test is to evaluate other parameters (e.g. fault volta
38、ge) the minimum test period may be shorter but not less than one cycle of the rated frequency. 4.2 The measuring equipment shall be capable of indicating whether the fault voltage at the rated residual current of the protective device is less than or equal to the conventional touch voltage limit. Th
39、e test may be carried out with or without a probe. NOTE Indication can be by displaying the value of the fault voltage or by the use of other clear indicators. 4.2.1 If a fault voltage is displayed or indicated for the residual operating current and not for the rated residual current, this shall be
40、indicated in the display or on the measuring equipment, or calculated according to the following formulae. The following condition shall be fulfilled: NIILFUU where 7 EN 61557-6:2007 ULis the conventional touch voltage limit. 4.2.2 The operating uncertainty during the measurement of the fault voltag
41、e shall not exceed 0 % to +20 % with the conventional touch voltage limit as fiducial value, determined in accordance with Table 1. NOTE The internal resistance of the voltage measuring equipment should be at least 0,7 k/V of the full-scale value of the measurement range. The influence of the voltag
42、e measurement on the measurement of the fault current should be taken into consideration. 4.3 The measuring equipment shall be capable of measuring the trip time of residual current protective devices at the rated residual operating current or shall be capable of indicating the compliance with the m
43、aximum allowed trip time. When measuring the trip time, the operating uncertainty shall not exceed 10 % with the maximum permissible trip time as fiducial value and the influence quantities according to Table 1. 4.4 On measuring equipment with indicators, the switching value of the indicators shall
44、be the conventional true value for the calculation of uncertainties, provided nothing to the contrary is stated. 4.5 The operating uncertainty applies under the rated operating conditions stated in IEC 61557-1 and the following: the protective conductor is free from extraneous voltages; the system v
45、oltage remains constant during the measurement; the circuit following the residual current protective device carries no leakage current; the system voltage is within 85 % to 110 % of the nominal system voltage for which the equipment has been designed; the resistance of the probes is within the limi
46、ts stated by the manufacturer; sinusoidal test current. 4.6 When testing with the rated residual operating current, the following conditions shall be met: the current shall be switched on at a zero crossing; the test period shall be limited to the maximum allowed trip time of the residual current pr
47、otective device under test. When measuring the trip time, these limits of the test periods need not be applied. 4.7 Prevention of danger during measurements by fault voltages exceeding 50 V within the system under test shall be ensured. This can be achieved as follows: automatic disconnection in acc
48、ordance with Figure 1 of IEC 61010-1 when fault voltages with a magnitude 50 V occur; use of test resistances Rpadjustable in steps, or continuously, in such a manner that the test is started with a resistance that permits current of a maximum of 3,5 mA to flow when all parallel-connected circuits a
49、re included. An unambiguous detection shall be ensured, for example by means of a voltmeter, as to whether this test resistance can be varied without producing a hazardous fault voltage. 4.8 The user shall not be exposed to danger and the equipment shall not be damaged when the measuring equipment is connected to 120 % of the nominal voltage of the distribution system for which the measuring equipment has been designed. Protective dev
