1、 IEC 62912 Edition 1.0 2015-07 INTERNATIONAL STANDARD NORME INTERNATIONALE Railway applications Direct current signalling monostable relays of type N and type C Applications ferroviaires Relais monostables de signalisation en courant continu de type N et de type C IEC 62912:2015-07(en-fr) THIS PUBLI
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19、rez nous donner des commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 62912 Edition 1.0 2015-07 INTERNATIONAL STANDARD NORME INTERNATIONALE Railway applications Direct current signalling monostable relays of type N and type C Applications ferroviaires Re
20、lais monostables de signalisation en courant continu de type N et de type C INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS 45.060 ISBN 978-2-8322-2818-0 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Elect
21、rotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 IEC 62912:2015 IEC 2015 CONTENTS FOREWORD 3 INTRODUCTION 5 1 Scope .6 2 Normative refere
22、nces 6 3 Terms and definitions 6 4 Classification .9 5 Essential requirements of the relays and their construction 9 5.1 Generic requirements for signalling relays .9 5.1.1 Forcibly guided (mechanically linked) contacts .9 5.1.2 Forcibly guided (mechanically linked) operation 9 5.2 Specific requirem
23、ents 10 5.2.1 Relays of type N 10 5.2.2 Relays of type C 10 5.3 Mechanical construction of the signalling relays 10 5.3.1 Connecting devices 10 5.3.2 Materials and arrangement. 10 5.4 Environmental conditions 10 5.4.1 General . 10 5.4.2 Vibrations and shocks 10 5.5 Magnetic system . 11 5.5.1 General
24、 . 11 5.5.2 Requirements for new relays 11 5.5.3 Functioning during service . 11 5.6 Design of insulation 12 5.6.1 General . 12 5.6.2 Overvoltage . 12 5.6.3 Test voltage . 12 5.6.4 Case of a supply circuit not connected to earth 12 5.6.5 Pollution 12 5.7 Contacts . 12 5.7.1 Spacing . 12 5.7.2 Break
25、contact 13 5.7.3 Contact heating . 13 5.7.4 Service life. 13 5.7.5 Minimum distance apart of the relay contact elements 13 5.7.6 Contact force . 13 5.7.7 Self-cleaning 14 5.7.8 Bounce 14 Bibliography . 15 IEC 62912:2015 IEC 2015 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ RAILWAY APPLICATIONS DIRE
26、CT CURRENT SIGNALLING MONOSTABLE RELAYS OF TYPE N AND TYPE C FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co
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36、ion of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62912 has been prepared by IEC technica
37、l committee 9: Electrical equipment and systems for railways. This standard is derived from EN 50578. The text of this standard is based on the following documents: FDIS Report on voting 9/2039/FDIS 9/2061/RVD Full information on the voting for the approval of this standard can be found in the repor
38、t on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. 4 IEC 62912:2015 IEC 2015 The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC website under “
39、http:/webstore.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. IEC 62912:2015 IEC 2015 5 INTRODUCTION This International Standard gives a set of generic and specific requirements for dir
40、ect current signalling relays. This International Standard introduces a set of recommendations and requirements for signalling relay characteristics, construction, magnetic system, contacts and insulation. Requirements are coordinated with current international standards on all-or-nothing relays. 6
41、IEC 62912:2015 IEC 2015 RAILWAY APPLICATIONS DIRECT CURRENT SIGNALLING MONOSTABLE RELAYS OF TYPE N AND TYPE C 1 Scope This International Standard gives requirements for direct current relays intended for safety- related applications in railway signalling installations. This International Standard is
42、 applicable to monostable relays of type N and type C. 2 Normative references The 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
43、edition of the referenced document (including any amendments) applies. IEC 60664-1, Insulation coordination for equipment within low-voltage systems Part 1: Principles, requirements and tests IEC 61810-3:2015, Electromechanical elementary relays Part 3: Relays with forcibly guided (mechanically link
44、ed) contacts IEC 62497-1, Railway applications Insulation coordination Part 1: Basic requirements Clearances and creepage distances for all electrical and electronic equipment IEC 62498-3: 2010, Railway applications Environmental conditions for equipment Part 3: Equipment for signalling and telecomm
45、unications 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 all-or-nothing relay electrical relay, which is intended to be energised by a quantity, the value of which is either within its operative range or effectively zero Note 1 to entry: “A
46、ll-or-nothing relays“ include both “elementary relays“ and “time relays“. SOURCE: IEC 60050-444:2002, 444-01-02 3.2 armature moveable part of a relay that controls contact members 3.3 bistable relay electrical relay which, having responded to an energising quantity and having changed its condition,
47、remains in that condition after the quantity has been removed; a further appropriate energisation is required to make it change its condition IEC 62912:2015 IEC 2015 7 SOURCE: IEC 60050-444:2002, 444-01-08 3.4 bounce time for a contact which is closing/opening its circuit, time interval between the
48、instant when the contact circuit first closes/opens and the instant when the circuit is finally closed/opened SOURCE: IEC 60050-444:2002, 444-05-04 3.5 break contact contact which is open when the relay is in its operate condition and which is closed when the relay is in its release condition SOURCE
49、: IEC 60050-444:2002, 444-04-18 3.6 change-over contact combination of two contact circuits with three contact members, one of which is common to the two contact circuits; such that when one of these contact circuits is open, the other is closed SOURCE: IEC 60050-444:2002, 444-04-19 3.7 contact gap gap between the contact points when the contact circuit is open SOURCE: IEC 60050-444:2002, 444-04-09 3.8 contact me
