IEC 61557-2-2007 交流1000V和直流1500V以下低压配电系统电气安全防护检测的

文件名称: IEC 61557-2-2007 交流1000V和直流1500V以下低压配电系统电气安全防护检测的试验、测量或监控设备第2部分：绝缘电阻.pdf

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详细说明：IEC 61557-2-2007 交流1000V和直流1500V以下低压配电系统电气安全防护检测的试验、测量或监控设备第2部分：绝缘电阻pdf,IEC 61557-2-2007 交流1000V和直流1500V以下低压配电系统电气安全防护检测的试验、测量或监控设备第2部分：绝缘电阻61557-2C:2007 5 INTERNATIONAL ELECTROTECHNICAL COM MISSION ELECTRICAL SAFETY IN LOW VOLTAGE DISTRIBUTION SYSTEMS UP TO1 000Vac AND 1 500v d.c EQUIPMENT FOR TESTING, MEASURING OR MONITORING OF PROTECTIVE MEASURES Part 2: Insulation resistance FOREWORD 1)The Internationa Electrote chnicat Com on(IEC) is a woridyeide crganization for standardizalion comprising a nationa! elect technical committees (IEc National C飞组银的. The object時!e却 to promote internatonal co-operation on all questions concerning standardization in the electrical and eiectronic fields. To this end and in addition to other act vities, IEC publishes intenational stand ards, Technical Specifications, Technical Resorts, Publicly Availabie specifications (PAS)and Guides (hereafter referred ta as lEC Publications. Their preparation is entrusted to technical committce: any lEc Nationa! Committee interested the subject deal with may participate in this preparatory work. international. governmenta and non governmental organizations liaising wi lh the lEC also particip ate in this preparation, lEC collaborates closely with the International Organiz ation for standardization( iso in accordance with condiions determined by agreement between the two organizations 2]The format decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus af opinion on the relevant subjects since each iechnicaf committe e has representation from all interested JEC National committees 3]IEC Publications have the form of recommendations for international use and are accep: ed by lEC Nation at Committees in that sense, While al! reasonable efforts are made te ensure that the technical content of tEC Publications is accurate, iEC cannoi be held responsible for the way in which they are used or for any misinterpretation by any end user 4] In order te promote internationai uniform ty, lEC National Committees undertake to apply iEC Publications transparent: y to tne maximum extent pose ibte in their nation and regional publications, Any divergence between any IEc Publication and the corresponding national or regional pulication shal be ciearly indicated in the latter provides ac marking procedure to indicate iis approval and be rendered responsible equipment declared to ba in conformity with an lEC Publication 6) All users should ensure that they have the latest edition of this publication ) No liability shall attach to lEC or its directors, employees. servan s or agents including individua! experts and members oi ifs technical committees and ieC National committees for any personal :njury property damage or 0 her damage o! any nature whats hether di for costs (ir cluding iegal fe expenses arising ou! of the publicalion, use of, or reliance upon. this IEc Publication of any other TEC Publications a) Attention is drawn to the Normative references cited in this pub isation use of the referenced publications is dispensable for the corre ct application oi this publicat 9)} Attention is drawn to the possibility that some of the elements af this IEC Publica0特罪y比倍 subjec4of patent rights, lEC shall not be held responsible for identifying any or al such patent rights International Standard lec 61557-2 has been prepared by lec technical committee 85 Measuring equi pment for electrical and electromagnetic quantities This second edition cancels and replaces the first edition published in 1997. This edition constitutes a technical revision The following changes were made with respect to the previous edition a)definitions complemented b) revision of some requirements have been revised c)addition of a warning pictogram dcompleie rev sion of the subclause on overload tests 61557-2⊙|EC:2007 了 The text of this standard is based on the following documents FDES Reporf on voting 85291FD|s 85301Rv套 Full information on tne voting for the approval of this standard can be found in the report on voting indicated in the above table This publication has been drafted in accordance with the ISo/EC Directives, Part 2 This part of IEC 61557 shal be used in conjunction with part i A list of all parts of the lEC 61557 series, published under the general title Electrical safety in fow voltage distribution systems up to 1 000 v a.c. and 1 500 v d.c. Equipment for festing measuring or monitoring of protective measures, can be found on the iec website The committee has decided thai the contents of this publication wil remain unchanged t打e maintenanceresultdateindicatedontheleCwebsiteunderhttp://webstore,iecchin data related to the specific publication. Al this date, the publication will be confirmed withdrawn replaced by a revised edition, or mended 615572C:2007 ELECTRICAL SAFETY IN LOW VOLTAGE DISTRIBUTION SYSTEMS UP To1 000V ac, ANd1 500y d. c EQUIPMENT FOR TESTING, MEASURING OR MONITORING OF PROTECTIVE MEASURES Part 2: Insulation resistance This part of lEC 61557 specifies the requirements applicable to equipment for measuring the insulation resistance of equipment and installations in the de-energized state 2 Normative references The follcwing referenced documents are indispensable fr the application of this docunent. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments)appfies IEC 61010-1: 2001, Safety requirements for c/ectrical equipment for measurement, controt, and faboratory use Part 1: Generat requirements iEC 61557-1 Electrica! safety in low voltage distribution systems up to 1 000 v a.c. and 1500 y d.c. -Equipment for testing, measuring or monitoring of protective measures Part 1 Generai reguirements 3 Terms and definitions For the purposes of this document, the definitions given in IEC 61557-1 and the following definitions apply. rated output voltage oltage output across the measuring equipment terminals when this equipment is loaded wiih the rated current Requirements The following requirements as well as those given in IEC 61557-1 shall apply 4.1 The output voltage shall be a d. c. voltage; the indication at hs rated output voltage across a resistor of a vaiue of UNX(1 000 n/) shall not differ by more than 10 relative to the indicated value, as a result of possibly present a c, voltage components in the output voltage, when a capacitor of 2 uf is connected in parallel with the insulation resistance to be measured 4.2 The open-circuit voltage shall not exceed 1, 25 times the rated output voltage. 4. 3 The rated current shal be at least 1 mA 615572c‖EC2007 11一 4. 4 The measuring current shall not exceed 15 mA peak. any a c. component present shall not exceed 1,5 ma peak 4.5 The maximum percentage operating uncertainty within the measurement range to be marked or stated shall not exceed +30 %u with the measured value as fiducial value. as determined in accordance with able 1 The cperating uncertainty shall apply under the rated operating conditions in accordance with Ec6557.1 Table 1- Calculation of operating uncertainty Intrinsic Requirs mants Reference conditions or uncertainty or Designation ar tests in accordance ype of specified operating range code wIth relevant parts of test infuence quantity IEC 61557 Intrinsic uncertainty i Reference conditions Pa2.Ube6主 Posilion Reference position 90 护贱1,bc:后e群2 我 Suppy voitage At the limits stated by the artt,s山2,43 manufacturer Temperature eand35°G Es I Fart 1 subclause 4.2 Operat Part 2, subclause 4 5 uEe;齿){v 8=(1+15E2+ trinsic uncerainty 8 % x100% 4.6 The user shall not be subjected to danger, when extraneous d.c. or a.c. voltages up to 120 of the highest rated ouput voltage are accidentally applied for a duration of 10 s to the measurement terminals of the measuring equipment 4,6,1 en the measuring equipment bears one of the following markings, the applied extraneous a, c, overvoltage can be reduced to a voltage of 1, 1 times the phase to phase voltage a)D0 NOT USE剝D|STR|BUI」 N SYSTEMS训 TH VOLTAGES HIGHER THAN…V The marking shall be written in the corresponding country language The value of ihe voltage shown on the mar king shall be 1. 1 times the maximum phase to phase voltag 61557-2非C:2007 13 b) Example of pictogram for a 500 V stem The pictogram and oUtline shall contrast with the background The value of the voltage n the marking shan be 1.1 times lum phase to pnase vollag After applying th s reduced a.c. overvoltage, the equipment shall stay within the specification 5 Marking and operating instructions 5.1 Marking In addition to the marking in accordance with lEC 61557-1, the following information shall be provided on: the measuring equipment, 1.1 Rated output voltage 5.1.2 Rated current 5.1.3 Measurement range in accordance with 4.5 5.2 Operating instructions The operating instructions shall state the following information in addition to the statements specified in」c615571 5.2.1 A warning stating that measurements shail be carried out only on parts of an installation or equipment that are de-energized 5.2.2 A statement on the correct operation when power is supplied by a hand-driven generator 5.2.3 In accordance with 6. 7 the pcssible number of measurements shall be stated far measuring equipment with power supplied by batteries accumulators 6 Tests In addition to iEc 61557-1 the following tests shall be executed 6.1 The operating uncertainty shall be determined in accordance with Table 1. In this process the intrinsic uncertainties shall be determined under the following reference conditions nominal value of the supply voltage nominal r.p. m when power is supplied by a hand-driven generator reference temperature 23C12C reference position in accordance with the manufacturers statement 61557-2⊙c2007 -15一 The operating uncertainty thus evaluated shall not exceed the limits specified in 4.5 6.2 The open-circuit voltage shall be checked for compliance with the specification in 4.2 (routine test Compliance with the requirements in 4. 3 shall be checked (routine ler e of UN X(1 000 2/V) 6.3 The rated current shall be tested through a test resistor of a value 6.4 The measuring current shall be tested and compliance with the requirements in 4. 4 shall be checked (routine test) NOTE. When an a.c. voltage is superimposed on the d. c, then measuring equlpment for measuring the peak value of the current must be used 6.5 Tests shall establish that the indication is stable and does not change by more than 10%0 hen a capacitor of 2 HF t 10% is connected in parallel. In this condition, the measuring equipment is loaded by a resistor free from capacitance and inductance in such a manner that the rated output voltage and rated current will accur (type test 6.6 Overload tests 6.6.1 overload test with a c. voltage The permissible overload in accordance with 4.6 or 4.6. 1 shall be tested. For this purpose an a.c. voltage according to 4.6. or 4.6.1 shall be applied for a duration of 10 s whilst the equipment is switched on and off The a.c. test source shall have the capability to activate protective devices and to indicate weak points of circuitry. If protective devices are activated or parts are damaged, the test shall be repeated with a test source having a capability according to 16.2 Of IEC 61010-1: 200 After test with a c. overvoltage according to 4.6, defects, if any, shall be clearly indicated indications and displayed values shall not lead to unsafe interpretations After tests with a c. overvoltages according to 4.6.1. the equipment shall stay within the specification This includes reactivation of protective devices by the user without any repair NoTE. The replacement of fuses accessible to the user should be considered as reactivation of a protective device 6.6.2 Overload tests with d. c. voltage In addition a.d.c. voltage of 1.2 times the magnitude of the highest rated output voltage stored on a capacitor of 2 uF shall be applied in both polarities whilst the equipment is switched on and off. After this the measuring equipment shail stay within the specification, without activation of protective devices range determined by the battery check facility is reached, shall be determinedoF 6.7 The number of measurements that it is possible to make until the limit of the voltage 615572‖EC:2007 In tiis process, the measuring equipment shall be loaded with a test resistance of x(1000 S2/v)alternating between 5 s loading and intervals of about 25 s ch new loading (type test) 6.8 Compliance with the tests in this clause shall be recorded

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