1、 IEC 62505-3-2 Edition 1.0 2009-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Railway applications Fixed installations Particular requirements for a.c. switchgear Part 3-2: Measurement, control and protection devices for specific use in a.c. traction systems Single-phase current transformers Applic
2、ations ferroviaires Installations fixes Exigences particulires pour appareillage courant alternatif Partie 3-2: Dispositifs de mesure, de commande et de protection pour usage spcifique dans les systmes de traction courant alternatif Transformateurs de courant monophass IEC 62505-3-2:2009 THIS PUBLIC
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17、actez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 62505-3-2 Edition 1.0 2009-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Railway applications Fixed installations Particular requirements for a.c. switchgear Part 3-2: Measurement, control and protection devices for specif
18、ic use in a.c. traction systems Single-phase current transformers Applications ferroviaires Installations fixes Exigences particulires pour appareillage courant alternatif Partie 3-2: Dispositifs de mesure, de commande et de protection pour usage spcifique dans les systmes de traction courant altern
19、atif Transformateurs de courant monophass INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE J ICS 45.060 PRICE CODE CODE PRIX ISBN 2-8318-1030-8 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Int
20、ernationale 2 62505-3-2 IEC:2009 CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative references6 3 Terms and definitions .6 4 Service conditions.7 5 Characteristics and use 7 6 Rating and design requirements7 7 Short circuit conditions on the primary side .7 8 Particular design and construction
21、 characteristics .7 8.1 Pollution 7 8.2 Floating potentials and earthing .8 8.3 Electromagnetic compatibility.8 8.4 Connections 8 8.5 Information to be given by the purchaser8 8.6 Information to be given by the supplier.8 9 Other requirements.9 62505-3-2 IEC:2009 3 INTERNATIONAL ELECTROTECHNICAL COM
22、MISSION _ RAILWAY APPLICATIONS FIXED INSTALLATIONS PARTICULAR REQUIREMENTS FOR AC SWITCHGEAR Part 3-2: Measurement, control and protection devices for specific use in a.c. traction systems Single-phase current transformers FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwid
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33、 Standard IEC 62505-3-2 has been prepared by IEC technical committee 9: Electrical equipment and systems for railways. This standard is based on EN 50152-3-2. The text of this standard is based on the following documents: FDIS Report on voting 9/1222/FDIS 9/1235/RVD Full information on the voting fo
34、r 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. 4 62505-3-2 IEC:2009 A list of all parts of IEC 62505 series, under the general title Railway applications Fixed ins
35、tallations Particular requirements for a.c. switchgear, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the maintenance result dateindicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the speci
36、fic publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 62505-3-2 IEC:2009 5 INTRODUCTION Part 3 of IEC 62505 series, “Railway applications Fixed installations Particular requirements for a.c. switchgear“, concerning the measurement,
37、control and protection devices for specific use in a.c. traction systems, comprises: IEC 62505-3-1: Application guide (informative document) IEC 62505-3-2: Single-phase current transformers (normative document) IEC 62505-3-3: Single-phase inductive voltage transformers (normative document) This Inte
38、rnational Standard applies when the equipment is concerned with the specified characteristics. The requirements contained in this standard complement those given in IEC 60044-1:1996, Amendment 1 (2000), Amendment 2 (2002). 6 62505-3-2 IEC:2009 RAILWAY APPLICATIONS FIXED INSTALLATIONS PARTICULAR REQU
39、IREMENTS FOR AC SWITCHGEAR Part 3-2: Measurement, control and protection devices for specific use in a.c. traction systems Single-phase current transformers 1 Scope This part of IEC 62505 gives particular requirements for current transformers used in a.c. single-phase railway applications, fixed ins
40、tallations. This International Standard applies to current transformers used at traction voltages and frequencies according to IEC 60850. The main uses of these current transformers are: measurement; protection. 2 Normative references The following referenced documents are indispensable for the appl
41、ication of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60044-1:1996, Instrument transformers Part 1: Current transformers Amendment 1 (2000), Amendment 2 (2002) IEC
42、60529:2001, Degrees of protection provided by enclosures (IP Code) IEC 60850, Railway applications Supply voltages of traction systems IEC 62236 (all parts), Railway applications Electromagnetic compatibility IEC 62497-1, Railway applications Insulation coordination Part 1: Basic requirements Cleara
43、nces and creepage distances for all electrical and electronic equipment IEC 62505 (all parts), Railway applications Fixed installations Particular requirements for a.c. switchgear 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 62505-1 and in IEC 600
44、44-1 apply. 62505-3-2 IEC:2009 7 4 Service conditions Where the equipment described in this part of the standard is mounted on circuit-breakers according to IEC 62505-1, then the service conditions of that standard apply. Where they are separately mounted and are used in association with switchgear
45、then the same service conditions as the switchgear apply. 5 Characteristics and use The current transformer shall be: a) either mounted inside the circuit-breaker specified in IEC 62505-1 and accommodated within special bushings on the circuit-breaker; technical requirements of this IEC 62505-3-2 ap
46、ply together with the construction and test requirements (as applicable) of IEC 62505-1; b) or separately mounted free standing; technical requirements of this IEC 62505-3-2 apply. 6 Rating and design requirements Clauses 4 and 5 of IEC 60044-1:1996 apply with the following exceptions: In Subclause
47、4.2 the words “but the preferred value is 5 A.” shall be replaced by “but the preferred values are 1 A or 5 A.” In Clause 5 the entire Subclause 5.1.1 shall be replaced by: 5.1.1 Rated insulation levels for the primary winding Current transformers covered by this standard shall have the same insulat
48、ion ratings and test values as the equipment into which they are installed. See Table 1 of IEC 62505-1 and IEC 62505-2. Free standing current transformers shall meet the same requirements. Subclause 5.1.6 of IEC 60044-1 is valid unless inconsistent with 8.1 of this Standard. 7 Short circuit conditio
49、ns on the primary side The following requirements, additional to those of IEC 60044-1:1996, apply: Current transformers shall have a rated short time withstand current for a duration of 1 s, with a peak value of 2,5 p.u. in accordance with the requirements of IEC 60044-1:1996. NOTE These events occur often and special attention should be paid to
