1、 IEC 60255-127Edition 1.0 2010-04INTERNATIONAL STANDARD NORME INTERNATIONALEMeasuring relays and protection equipment Part 127: Functional requirements for over/under voltage protection Relais de mesure et dispositifs de protection Partie 127: Exigences fonctionnelles pour les protections minimum et
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16、stions, visitez le FAQ du Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 60255-127Edition 1.0 2010-04INTERNATIONAL STANDARD NORME INTERNATIONALEMeasuring relays and protection equipment Part 127: Functional requirements for over/under voltage prot
17、ection Relais de mesure et dispositifs de protection Partie 127: Exigences fonctionnelles pour les protections minimum et maximum de tension INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE TICS 29.120.70 PRICE CODECODE PRIXISBN 978-2-88910-077-4 Registered tradem
18、ark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale 2 60255-127 IEC:2010 CONTENTS FOREWORD.4 1 Scope and object6 2 Normative references .6 3 Terms and definitions .6 4 Specification of the function8 4.1 General .8 4.2 Input energising qu
19、antities/Energising quantities .8 4.3 Binary input signals .9 4.4 Functional logic .9 4.4.1 Operating characteristics.9 4.4.2 Reset characteristics .13 4.5 Binary output signals.14 4.5.1 Start (pick-up) signal .14 4.5.2 Operate (trip) signal.15 4.5.3 Other binary output signals15 5 Performance speci
20、fication 15 5.1 Accuracy related to the characteristic quantity.15 5.2 Accuracy related to the operate time .15 5.3 Accuracy related to the reset time .16 5.4 Transient performance 16 5.4.1 Overshoot time 16 5.4.2 Response to time varying value of the characteristic quantity 16 5.5 Voltage transform
21、er requirements .16 6 Functional test methodology.16 6.1 General .16 6.2 Determination of steady state errors related to the characteristic quantity .17 6.2.1 Accuracy of setting (start) value 17 6.2.2 Reset ratio determination.18 6.3 Determination of steady state errors related to the start and ope
22、rate time .18 6.4 Determination of steady state errors related to the reset time19 6.5 Determination of transient performance.20 6.5.1 Overshoot time for undervoltage protection .20 6.5.2 Response to time varying value of the characteristic quantity for dependent time relays .20 7 Documentation requ
23、irements 21 7.1 Type test report.21 7.2 Other user documentation .22 Annex A (informative) Reset time determination for relays with trip output only23 Bibliography24 Figure 1 Simplified protection function block diagram.8 Figure 2 Overvoltage independent time characteristic 9 Figure 3 Undervoltage i
24、ndependent time characteristic 10 Figure 4 Dependent time characteristic for overvoltage protection .11 Figure 5 Dependent time characteristic for undervoltage protection .12 60255-127 IEC:2010 3 Figure 6 Definite time reset characteristic 14 Figure 7 Definite time reset characteristic (alternative
25、solution with instantaneous reset after relay operation)14 Figure 8 Test waveform .21 Figure A.1 Dependent reset time determination .23 Table 1 Test points for overvoltage elements .19 Table 2 Test points for undervoltage elements.19 Table 3 Test points for overvoltage elements .20 Table 4 Test poin
26、ts for undervoltage elements.20 Table 5 Recommended values for the test .21 4 60255-127 IEC:2010 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ MEASURING RELAYS AND PROTECTION EQUIPMENT Part 127: Functional requirements for over/under voltage protection FOREWORD 1) The International Electrotechnical Co
27、mmission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end an
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36、tion or 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 Publica
37、tion may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60255-127 has been prepared by IEC technical committee 95: Measuring relays and protection equipment. The text of this standard is based on the follow
38、ing documents: CDV Report on voting 95/254/CDV 95/261/RVC Full information on the 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/IEC Directives, Part 2. A list of all parts of th
39、e IEC 60255 series can be found, under the general title Measuring relays and protection equipment, on the IEC website. 60255-127 IEC:2010 5 The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webst
40、ore.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. 6 60255-127 IEC:2010 MEASURING RELAYS AND PROTECTION EQUIPMENT Part 127: Functional requirements for over/under voltage protection 1 S
41、cope This part of IEC 60255 specifies minimum requirements for over/under voltage relays. The standard includes specification of the protection function, measurement characteristics and time delay characteristics. This standard defines the influencing factors that affect the accuracy under steady st
42、ate conditions and performance characteristics during dynamic conditions. The test methodologies for verifying performance characteristics and accuracy are also included in this standard. The over/under voltage functions covered by this standard are as follows: IEEE/ANSI C37.2 Function numbers IEC 6
43、1850-7-4 Logical nodes Phase undervoltage protection 27 PTUV Positive sequence undervoltage protection 27D PTUV Phase overvoltage protection 59 PTOV Residual/zero-sequence overvoltage protection 59N/59G PTOV Negative sequence/ unbalance overvoltage protection 47 PTOV The general requirements for mea
44、suring relays and protection equipment are specified in IEC 60255-1. 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 do
45、cument (including any amendments) applies. IEC 60044 (all parts), Instrument transformers IEC 60255-1, Measuring relays and protection equipment Part 1: Common requirements 3 Terms and definitions For the purposes of this document, the following terms and definition apply 3.1 theoretical curve of ti
46、me versus characteristic quantity curve which represents the relationship between the theoretical specified operate time and the characteristic quantity 60255-127 IEC:2010 7 3.2 curves of maximum and minimum limits of the operate time curves of the limiting errors on either side of the theoretical t
47、ime vs. characteristic quantity which identify the maximum and minimum operate times corresponding to each value of the characteristic quantity 3.3 setting value (start) of the characteristic quantity GSthe reference value used for the definition of the theoretical curve of time vs. characteristic q
48、uantity 3.4 start time duration of the time interval between the instant when the characteristic quantity of the measuring relay in reset condition is changed, under specified conditions, and the instant when the start signal asserts 3.5 operate time duration of the time interval between the instant
49、 when the characteristic quantity of a measuring relay in reset condition is changed, under specified conditions, and the instant when the relay operates IEC 60050-447:2010, 447-05-05 3.6 disengaging time duration of the time interval between the instant a specified change is made in the value of the input energizing quantity which will cause the relay to disengage and the instant it disengages
