1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationInstrument transformersPart 2: Additional requirements for current transformersBS EN 61869-2:2012Copyright European Committee for Electrotechnical Standardization Provided by IHS
2、 under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-National forewordThis British Standard is the UK implementation of EN 61869-2:2012. It isidentical to IEC 61869-2:2012. It supersedes BS EN 60044-1:1999 and BS EN 60044-6:1999, which are wit
3、hdrawn.The UK participation in its preparation was entrusted to Technical CommitteePEL/38, Instrument transformers.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.
4、Users are responsible for its correct application. The British Standards Institution 2012 Published by BSI Standards Limited 2012 ISBN 978 0 580 59139 6 ICS 17.220.20Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authori
5、ty of the Standards Policy and Strategy Committee on 31 January 2013.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 61869-2:2012Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproducti
6、on or networking permitted without license from IHS-,-,-EUROPEAN STANDARD EN 61869-2 NORME EUROPENNE EUROPISCHE NORM November 2012 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Manageme
7、nt Centre: Avenue Marnix 17, B - 1000 Brussels 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61869-2:2012 E ICS 17.220.20 Supersedes EN 60044-1:1999 + A1:2000 + A2:2003, EN 60044-6:1999English version Instrument transformer
8、s - Part 2: Additional requirements for current transformers (IEC 61869-2:2012) Transformateurs de mesure - Partie 2: Exigences supplmentaires concernant les transformateurs de courant(CEI 61869-2:2012) Messwandler - Teil 2: Zustzliche Anforderungen fr Stromwandler (IEC 61869-2:2012) This European S
9、tandard was approved by CENELEC on 2012-10-23. 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. Up-to-date lists and bibliographical references conc
10、erning 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 translation under the responsibility of a CENELEC m
11、ember 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 Republic, Denmark, Estonia, Finland, Former Yugoslav Repu
12、blic 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 EN 61869-2:2012Copyright European Committee for El
13、ectrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EN 61869-2:2012 - 2 - Foreword The text of document 38/435/FDIS, future edition 1 of IEC 61869-2, prepared by IEC/TC 38, “Instrument transformer
14、s“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61869-2:2012. The following dates are 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) 2013-07-23 latest date by wh
15、ich the national standards conflicting with the document have to be withdrawn (dow) 2015-10-23 This document supersedes EN 60044-1:1999 + A1:2000 + A2:2003 and EN 60044-6:1999. Additionally it introduces technical innovations in the standardization and adaptation of the requirements for current tran
16、sformers for transient performance. This Part 2 is to be used in conjunction with, and is based on, EN 61869-1:2009, General Requirements however the reader is encouraged to use its most recent edition. This Part 2 follows the structure of EN 61869-1:2009 and supplements or modifies its correspondin
17、g clauses. When a particular clause/subclause of Part 1 is not mentioned in this Part 2, that clause/subclause applies as far as is reasonable. When this standard states “addition”, “modification” or “replacement”, the relevant text in Part 1 is to be adapted accordingly. For additional clauses, sub
18、clauses, figures, tables, annexes or notes, the following numbering system is used: clauses, subclauses, tables, figures and notes that are numbered starting from 201 are additional to those in Part 1; additional annexes are lettered 2A, 2B, etc. Annex ZZ of EN 61869-1 is not applicable for this par
19、t of the series. An overview of the planned set of standards at the date of publication of this document is given below. The updated list of standards prepared by IEC TC38 is available at the website: www.iec.ch; the updated list of standards prepared by IEC TC38 and approved by CENELEC is available
20、 at the website: www.cenelec.eu. BS EN 61869-2:2012Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- 3 - EN 61869-2:2012 PRODUCT FAMILY STANDARDS PRODUCT STAN
21、DARD PRODUCTS OLD STANDARD 61869-1 GENERAL REQUIREMENTS FOR INSTRUMENT TRANSFORMERS 61869-2 ADDITIONAL REQUIREMENTS FOR CURRENT TRANSFORMERS 60044-1 61869-3 ADDITIONAL REQUIREMENTS FOR INDUCTIVE VOLTAGE TRANSFORMERS 60044-2 61869-4 ADDITIONAL REQUIREMENTS FOR COMBINED TRANSFORMERS 60044-3 61869-5 AD
22、DITIONAL REQUIREMENTS FOR CAPACITIVE VOLTAGE TRANSFORMERS 60044-5 61869-6 ADDITIONAL GENERAL REQUIREMENT FOR ELECTRONIC INSTRUMENT TRANSFORMERS AND LOW POWER STAND ALONE SENSORS 61869-7 ADDITIONAL REQUIREMENTS FOR ELECTRONIC VOLTAGE TRANSFORMERS 60044-7 61869-8 ADDITIONAL REQUIREMENTS FOR ELECTRONIC
23、 CURRENT TRANSFORMERS 60044-8 61869-9 DIGITAL INTERFACE FOR INSTRUMENT TRANSFORMERS 61869-10 ADDITIONAL REQUIREMENTS FOR LOW-POWER STAND-ALONE CURRENT SENSORS 61869-11 ADDITIONAL REQUIREMENTS FOR LOW POWER STAND ALONE VOLTAGE SENSOR 60044-7 61869-12 ADDITIONAL REQUIREMENTS FOR COMBINED ELECTRONIC IN
24、STRUMENT TRANSFORMER OR COMBINED STAND ALONE SENSORS 61869-13 STAND ALONE MERGING UNIT Since the publication of EN 60044-6 (Requirements for protective current transformers for transient performance) in 1999, the area of application of this kind of current transformers has been extended. As a conseq
25、uence, the theoretical background for the dimensioning according to the electrical requirements has become much more complex. In order to keep this standard as user-friendly as possible, the explanation of the background information will be transferred to the Technical Report IEC/TR 61869-100, which
26、 is now in preparation. 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. This standard covers the Principle Elements of the Safety Obje
27、ctives for Electrical Equipment Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC). Endorsement notice The text of the International Standard IEC 61869-2:2012 was approved by CENELEC as a European Standard without any modification. BS EN 61869-2:2012Copyright European Committee for El
28、ectrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EN 61869-2:2012 - 4 - Annex ZA (normative) Normative references to international publications with their corresponding European publications The
29、 following documents, in whole or in part, are normatively referenced in this document and are indispensable 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
30、an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Addition to Annex ZA of EN 61869-1:2009: Publication Year Title EN/HD Year IEC 61869-1 (mod) 2007 Instrument transformers - Part 1: General requirements EN 61869-1 2009 BS EN 61869
31、-2:2012Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- 2 61869-2 IEC:2012 CONTENTS 1 Scope . 8 2 Normative references . 8 3 Terms and definitions . 8 3.1 Ge
32、neral definitions 8 3.3 Definitions related to current ratings 9 3.4 Definitions related to accuracy 10 3.7 Index of abbreviations . 18 5 Ratings . 20 5.3 Rated insulation levels 20 5.3.2 Rated primary terminal insulation level . 20 5.3.5 Insulation requirements for secondary terminals . 20 5.3.201
33、Inter-turn insulation requirements . 20 5.5 Rated output . 20 5.5.201 Rated output values . 20 5.5.202 Rated resistive burden values 20 5.6 Rated accuracy class 21 5.6.201 Measuring current transformers 21 5.6.202 Protective current transformers 22 5.6.203 Class assignments for selectable-ratio curr
34、ent transformers . 26 5.201 Standard values for rated primary current . 26 5.202 Standard values for rated secondary current . 27 5.203 Standard values for rated continuous thermal current . 27 5.204 Short-time current ratings . 27 5.204.1 Rated short-time thermal current (Ith) . 27 5.204.2 Rated dy
35、namic current (Idyn) 27 6 Design and construction . 27 6.4 Requirements for temperature rise of parts and components 27 6.4.1 General 27 6.13 Markings . 27 6.13.201 Terminal markings 27 6.13.202 Rating plate markings . 28 7 Tests 30 7.1 General 30 7.1.2 Lists of tests . 30 7.2 Type tests . 31 7.2.2
36、Temperature-rise test . 31 7.2.3 Impulse voltage withstand test on primary terminals . 33 7.2.6 Tests for accuracy 33 7.2.201 Short-time current tests 35 7.3 Routine tests 36 7.3.1 Power-frequency voltage withstand tests on primary terminals . 36 7.3.5 Tests for accuracy 36 7.3.201 Determination of
37、the secondary winding resistance (Rct) . 38 7.3.202 Determination of the secondary loop time constant (Ts) 38 BS EN 61869-2:2012Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without li
38、cense from IHS-,-,-61869-2 IEC:2012 3 7.3.203 Test for rated knee point e.m.f. (Ek) and exciting current at Ek39 7.3.204 Inter-turn overvoltage test 39 7.4 Special tests . 40 7.4.3 Measurement of capacitance and dielectric dissipation factor . 40 7.4.6 Internal arc fault test 40 7.5 Sample tests . 4
39、1 7.5.1 Determination of the remanence factor . 41 7.5.2 Determination of the instrument security factor (FS) of measuring current transformers 41 Annex 2A (normative) Protective current transformers classes P, PR . 42 Annex 2B (normative) Protective current transformer classes for transient perform
40、ance . 47 Annex 2C (normative) Proof of low-leakage reactance type . 63 Annex 2D (informative) Technique used in temperature rise test of oil-immersed transformers to determine the thermal constant by an experimental estimation . 64 Annex 2E (informative) Alternative measurement of the ratio error (
41、) 66 Annex 2F (normative) Determination of the turns ratio error . 68 Figure 201 Duty cycles 15 Figure 202 Primary time constant TP16 Figure 203 Secondary linked flux for different fault inception angles 17 Figure 2A.1 Vector Diagram . 42 Figure 2A.2 Error triangle . 43 Figure 2A.3 Typical current w
42、aveforms 44 Figure 2A.4 Basic circuit for 1:1 current transformer 44 Figure 2A.5 Basic circuit for current transformer with any ratio. 45 Figure 2A.6 Alternative test circuit . 45 Figure 2B.1 Short-circuit current for two different fault inception angles . 48 Figure 2B.2 max(t) as the curve of the h
43、ighest flux values, considering all relevant fault inception angles . 48 Figure 2B.3 Relevant time ranges for calculation of transient factor . 49 Figure 2B.4 Determination of Ktf in time range 1 at 50 Hz for Ts = 1,8 s . 50 Figure 2B.5 Determination of Ktf in time range 1 at 60 Hz for Ts = 1,5 s .
44、50 Figure 2B.6 Determination of Ktf in time range 1 at 16,7 Hz for Ts = 5.5 s . 50 Figure 2B.7 Limiting the magnetic flux by considering core saturation 52 Figure 2B.8 Basic circuit 53 Figure 2B.9 Determination of remanence factor by hysteresis loop 55 Figure 2B.10 Circuit for d.c. method . 56 Figur
45、e 2B.11 Time-amplitude and flux-current diagrams 56 Figure 2B.12 Recordings with shifted flux base line . 57 Figure 2B.13 Circuit for capacitor discharge method 58 Figure 2B.14 Typical records for capacitor discharge method 59 Figure 2B.15 Measurement of error currents 60 Figure 2D.1 Graphical extra
46、polation to ultimate temperature rise . 65 Figure 2E.1 Simplified equivalent circuit of the current transformer 66 BS EN 61869-2:2012Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted witho
47、ut license from IHS-,-,- 4 61869-2 IEC:2012 Table 201 Limits of ratio error and phase displacement for measuring current transformers (classes 0,1 to 1) 21 Table 202 Limits of ratio error and phase displacement for measuring current transformers (classes 0,2S and 0,5S) . 22 Table 203 Limits of ratio
48、 error for measuring current transformers (classes 3 and 5) 22 Table 204 Characterisation of protective classes . 23 Table 205 Error limits for protective current transformers class P and PR 23 Table 206 Error limits for TPX, TPY and TPZ current transformers. 25 Table 207 Specification Methods for TPX, TPY and TPZ current transformers . 26 Table 208 Marking of terminals 28 Table 10 List of tests . 31 BS EN 61869-2:2012Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELEC
