BS-6272-1982 EN-50042-1980.pdf
BRITISH STANDARD BS 6272:1982 EN 50 042 Specification for Low voltage switchgear and controlgear for industrial use Terminal marking Terminals for external associated electronic circuit components and contacts This European Standard EN 50 042 was given as from 30 September 1982 the status of a British Standard UDC 621.316.54:621.3.027.2:621.315.684:003.62 Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:19:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6272:1982 This British Standard was published under the authority of the Board of BSI and comes into effect on 30 September 1982 © BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference PEL/10 Draft for comment 79/24447 DC ISBN 0 580 12788 5 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the National Committees of the following countries: AustriaLuxemburg BelgiumNetherlands DenmarkNorway FinlandPortugal FranceSpain GermanySweden GreeceSwitzerland IrelandUnited Kingdom Italy Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:19:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6272:1982 © BSI 07-1999i Contents Page Cooperating organizationsInside front cover Foreword2 Text of EN 50 0423 National appendixA8 National appendix B8 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:19:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6272:1982 ii © BSI 07-1999 A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:19:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 50 042 Edition 1 December 1980 UDC: 621.316.54:621.3.027.2:621.315.684:003.62 Key words: Electrical switchgear and controlgear, low voltage, industrial use, terminals, marking, external contacts, external electronic components English version Low voltage switchgear and controlgear for industrial use Terminal marking Terminals for external associated electronic circuit components and contacts Appareillage industriel à basse tension Marquage des bornes Bornes pour les composants de circuit électronique et pour les contacts extérieurs associés Industrielle Niederspannungs-Schaltgeräte Anschlussbezeichnungen Klemmen zum Anschluss zugehöriger, aussenliegender elektronischer Bauelemente und Kontakte This European Standard was accepted by CENELEC on 1980-12-11. The CENELEC members are bound to adhere to the CENELEC Internal Regulations which specify under which conditions this European Standard has to be given, without any alteration, the status of a national standard. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CENELEC General Secretariat or to any CENELEC member. This European Standard is established by CENELEC in three official versions (English, French, German). A translation made by another member under its own responsibility, in its own language, and notified to CENELEC has the same status. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels © Copyright reserved to all CENELEC members Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:19:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50 042 © BSI 07-1999 2 Foreword Switchgear and controlgear may be given a terminal marking in accordance with the general rules of the European Standard EN 50 005. This standard gives additional requirements. Contents Foreword2 1Scope3 2Marking of terminals for external associated electronic circuit components and contacts3 3Marking of terminals of a complete device5 Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:19:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50 042 © BSI 07-19993 1 Scope This standard applies to switching devices which are able to operate only when completed with external associated electronic circuit components and contacts. The rules in this standard apply only to terminals for external associated electronic circuit components and contacts. These are a supplement to the general rules for the marking: of control supply terminals (see EN 50 005, clause 3.1), and of terminals for internal auxiliary contact elements (see EN 50 005, clause 4.2). The use of this standard is recommended where terminal marking is a requirement of the relevant standard for switching devices or is usual practice. 2 Marking of terminals for external associated electronic circuit components and contacts Terminals for external associated electronic circuit components and contacts shall be marked in the following alpha-numerical manner. 2.1 Marking of terminals for external associated impedances 2.1.1 The two terminals for an external associated impedance Z shall be marked Z1 and Z2. 2.1.2 For an impedance Z with tappings, the terminals for the tappings shall be marked in sequential order Z3, Z4, etc. 2.1.3 In case of more than one impedance, the terminals shall be marked by using the letter Z and two-figure numbers, the first figure being a sequence number. Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:19:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50 042 4 © BSI 07-1999 2.1.4 For particular application to a control system associated with thermistors for built-in thermal protection of rotating electrical machines, the rules for terminal marking T1, T2, . . . or 1T1, 1T2, . . . and 2T1, 2T2, . . . are given in IEC Publication 34-11 (1978), clause 6.2.1. 2.2 Marking of terminals for external associated contacts 2.2.1 The two terminals for an external associated make or break contact or a group of contacts shall be marked Y1 and Y2. NOTE 1A bridge between two terminals is considered as a permanently closed contact and the corresponding terminals shall be marked Y1 and Y2. Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:19:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50 042 © BSI 07-19995 NOTE 2For an external circuit comprising an association of impedance(s) and contact(s), the corresponding terminals shall be marked Y1 and Y2. 2.2.2 In case of more than one contact or one group of contacts, the terminals shall be marked by using the letter Y and two-figure numbers, the first figure being a sequence number. 2.2.3 The three terminals necessary for connection of several contacts which operate simultaneously (e.g. forming a change-over contact) shall be marked Y1, Y2 and Y3, Y1 being the common. 3 Marking of terminals of a complete device To illustrate the association of the general rules EN 50 005 and the rules of this standard, four examples of the terminal marking of a complete device are given as follows: Example 1. Switching device having: two control supply terminals A1, A2 two terminals Z1, Z2 for an external associated variable resistor and three terminals 15, 16, 18 for an internal delayed change-over contact. Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:19:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50 042 6 © BSI 07-1999 Example 2. Switching device having: two control supply terminals A1, A2 four terminals for two external associated impedances (Z11, Z12 for a variable resistor and Z21, Z22 for a capacitor) and three terminals 15, 16, 18 for an internal delayed change-over contact. Example 3. Switching device having: two control supply terminals A1, A2 two terminals Y11, Y12 for an external associated group of contacts three terminals Y21, Y22, Y23 for an external associated change-over contact and three terminals 11, 12, 14 for an internal change-over contact. Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:19:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50 042 © BSI 07-19997 Example 4. Switching device having: two control supply terminals A1, A2 two terminals Y1, Y2 for an external bridge three terminals Z1, Z3, Z2 for an external associated resistor with a tapping and three terminals 15, 16, 18 for an internal delayed change-over contact. Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:19:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6272:1982 8 © BSI 07-1999 National appendix A The United Kingdom participation in the preparation of this European Standard came under the direction of the Power Electrical Engineering Standards Committee of BSI. The committee consists of representatives from the following: Associated Offices Technical Committee Association of Short Circuit Testing Authorities* British Electrical and Allied Manufacturers Association (BEAMA) British Railways Board British Steel Corporation Department of Energy Electricity Department of Industry Electrical Contractors Association* Electrical Contractors Association of Scotland Electricity Supply Industry in England and Wales* Energy Industries Council ERA Technology Ltd* Institute of Purchasing & Supply Institution of Electrical Engineers* Ministry of Defence National Coal Board National Economic Development Office* Trades Union Congress The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee involved with the work on this standard: Association of Control Manufacturers Tacma (BEAMA) Association of Supervisory and Executive Engineers Control and Automation Manufacturers Association (BEAMA) Electrical Installation Equipment Manufacturers Association (BEAMA) Electronic Components Industry Federation Engineering Equipment Users Association Health and Safety Executive The Transmission & Distribution Association (BEAMA) National appendix B With reference to the foreword and clauses 1 and 3, EN 50 005 has been published as BS 5472. Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:19:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6272:1982 © BSI 07-1999 Publications referred to BS 5472 EN 50 005, Specification for low voltage switchgear and controlgear for industrial use. Terminal marking and distinctive number. General rules. IEC 34-11, Rotating electrical machines Part 11: Built-in thermal protection Chapter 1: Rules for protection of rotating electrical machines. Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:19:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6272:1982 EN 50 042 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. 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Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:19:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
