1、BSI Standards PublicationMeasuring relays and protection equipmentPart 127: Functional requirements for over/under voltage protectionBS EN 60255-127:2014National forewordThis British Standard is the UK implementation of EN 60255-127:2014. It isidentical to IEC 60255-127:2010. Together with BS EN 602
2、55-151:2009 itsupersedes BS EN 60255-3:1998, which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PEL/95, Measuring relays and protection systems.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publicatio
3、n does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 64017 9ICS 29.120.70Compliance with a British Standard cannot confer immunity froml
4、egal obligations.T h i s B r i t i s h S t a n d a r d w a s p u b l i s h e d u n d e r t h e a u t h o r i t y o f t h eS t a n d a r d s P o l i c y a n d S t r a t e g y C o m m i t t e e o n 28 February 2 0 1 4 .Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS
5、EN 60255-127:2014EUROPEAN STANDARD EN 60255-127 NORME EUROPENNE EUROPISCHE NORM January 2014 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 1
6、7, B - 1000 Brussels 2014 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60255-127:2014 E ICS 29.120.70 Supersedes EN 60255-3:1998 + corr. Jan.1998 English version Measuring relays and protection equipment - Part 127: Functional
7、requirements for over/under voltage protection (IEC 60255-127:2010) Relais de mesure et dispositifs de protection - Partie 127: Exigences fonctionnelles pour les protections minimum et maximum de tension (CEI 60255-127:2010) Messrelais und Schutzeinrichtungen - Teil 127: Funktionsnorm fr ber-/Unters
8、pannungsschutz (IEC 60255-127:2010) This European Standard was approved by CENELEC on 2013-09-19. CENELEC members 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. U
9、p-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by
10、translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republ
11、ic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS
12、 EN 60255-127:2014EN 60255-127:2014 - 2 - Foreword The text of document 95/254/CDV, future edition 1 of IEC 60255-127, prepared by IEC/TC 95 “Measuring relays and protection equipment“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60255-127:2014. The following dates ar
13、e fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2014-07-10 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2016-09-19 This document superse
14、des EN 60255-3:1998. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 602
15、55-127:2010 was 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 61850 NOTE Harmonized in EN 61850 series. IEC 61850-7-4 NOTE Harmonized as EN 61850-7-4. IEC 61850-9-2
16、 NOTE Harmonized as EN 61850-9-2. BS EN 60255-127:2014- 3 - EN 60255-127:2014 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indis
17、pensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the rele
18、vant EN/HD applies. Publication Year Title EN/HD Year IEC 60044 series Instrument transformers EN 60044 series IEC 60255-1 - Measuring relays and protection equipment Part 1: Common requirements EN 60255-1 - BS EN 60255-127:2014 2 60255-127 IEC:2010 CONTENTS 1 Scope and object6 2 Normative reference
19、s .6 3 Terms and definitions .6 4 Specification of the function8 4.1 General .8 4.2 Input energising quantities/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 (pic
20、k-up) signal .14 4.5.2 Operate (trip) signal.15 4.5.3 Other binary output signals15 5 Performance specification 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 Oversho
21、ot time 16 5.4.2 Response to time varying value of the characteristic quantity 16 5.5 Voltage transformer 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
22、.2.2 Reset ratio determination.18 6.3 Determination of steady state errors related to the start and operate 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
23、to time varying value of the characteristic quantity for dependent time relays .20 7 Documentation requirements 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
24、function block diagram.8 Figure 2 Overvoltage independent time characteristic 9 Figure 3 Undervoltage independent time characteristic 10 Figure 4 Dependent time characteristic for overvoltage protection .11 Figure 5 Dependent time characteristic for undervoltage protection .12 BS EN 60255-127:201460
25、255-127 IEC:2010 3 Figure 6 Definite time reset characteristic 14 Figure 7 Definite time reset characteristic (alternative 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 eleme
26、nts .19 Table 2 Test points for undervoltage elements.19 Table 3 Test points for overvoltage elements .20 Table 4 Test points for undervoltage elements.20 Table 5 Recommended values for the test .21 BS EN 60255-127:2014 6 60255-127 IEC:2010 MEASURING RELAYS AND PROTECTION EQUIPMENT Part 127: Functio
27、nal requirements for over/under voltage protection 1 Scope 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 influe
28、ncing factors that affect the accuracy under steady state 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
29、are as follows: IEEE/ANSI C37.2 Function numbers IEC 61850-7-4 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 overvolta
30、ge protection 47 PTOV The general requirements for measuring 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 undat
31、ed references, the latest edition of the referenced document (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
32、terms and definition apply 3.1 theoretical curve of time versus characteristic quantity curve which represents the relationship between the theoretical specified operate time and the characteristic quantity BS EN 60255-127:201460255-127 IEC:2010 7 3.2 curves of maximum and minimum limits of the oper
33、ate time curves of the limiting errors on either side of the theoretical time 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 use
34、d for the definition of the theoretical curve of time vs. characteristic quantity 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
35、asserts 3.5 operate time duration of the time interval between the instant 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
36、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 IEC 60050-447:2010, 447-05-10 3.7 reset time duration of the time interval between the instant when the characteristic quantity
37、of a measuring relay in operate condition is changed, under specified conditions, and the instant when the relay resets IEC 60050-447:2010, 447-05-06 3.8 overshoot time the difference between the operate time of the relay at the specified value of the input energising quantity and the maximum durati
38、on of the value of input energising quantity which, when suddenly reduced (for the overvoltage relay)/increased(for the undervoltage relay) to a specified value below(for the overvoltage relay)/above(for the undervoltage relay) the setting value, is insufficient to cause operation 3.9 threshold of i
39、ndependent time operation GDthe value of the characteristic quantity at which the relay operate time changes from dependent time operation to independent time operation BS EN 60255-127:2014 8 60255-127 IEC:2010 3.10 reset ratio disengaging ratio ratio between the voltage value at the point where the
40、 relay just ceases to start (start signal changes from ON to OFF) and the actual start voltage of the element. NOTE It is usually defined as a percentage such that for an overvoltage element the resetting ratio shall be less than 100 % and for an undervoltage element the reset ratio shall be greater
41、 than 100 %. 4 Specification of the function 4.1 General The protection function with its inputs, outputs, measuring element, time delay characteristics and functional logic is shown in Figure 1. The manufacturer shall provide the functional block diagram of the specific implementation. Figure 1 Sim
42、plified protection function block diagram 4.2 Input energising quantities/Energising quantities The input energising quantities are the measuring signals, e.g. voltages. Their ratings and relevant standards are specified in IEC 60255-1. Input energising quantities can come with wires from voltage tr
43、ansformers or as a data packet over a communication port using an appropriate communication protocol (such as IEC 61850-9-2). The energising quantities used by the protection function need not be directly the voltage at the secondary side of the voltage transformers. Therefore, the measuring relay d
44、ocumentation shall state the type of energising quantities used by the protection function. Examples are: single phase voltage measurement; three phase voltage (phase to phase or phase to earth) measurement; neutral to earth voltage or residual voltage measurement; positive, negative or zero sequenc
45、e voltage measurement. The type of measurement of the energising quantity shall be stated. Examples are: RMS value of the signal; IEC 743/10 BS EN 60255-127:201460255-127 IEC:2010 9 RMS value of the fundamental component of the signal; RMS value of a specific harmonic component of the signal; peak v
46、alues of the signal; instantaneous value of the signal. 4.3 Binary input signals If any binary input signals (externally or internally driven) are used, their influence on the protection function shall be clearly described on the functional logic diagram. Additional textual description may also be p
47、rovided if this can further clarify the functionality of the input signals and their intended usage. 4.4 Functional logic 4.4.1 Operating characteristics 4.4.1.1 General The relationship between operate time and characteristic quantity can be expressed by means of a characteristic curve. The shape o
48、f this curve shall be declared by the manufacturer by an equation (preferred) or by graphical means. This standard specifies two types of characteristics: independent time characteristic (i.e. definite time delay); dependent time characteristic (i.e. inverse time delay). The time characteristic defi
49、nes the operate time which is the duration between the instant when the input energising quantity crosses the setting value (GS) and the instant when the relay operates. 4.4.1.2 Independent time characteristic Independent time characteristic is defined in terms of the setting value of the characteristic quantity GSand the operate time top. When no intentional time delay is used then the independent time relay is denoted as an instantaneous relay. For overvoltage relays, t(G)= top
