1、BRITISH STANDARD BS6520:1984 EN 50047:1981 Specification for Low voltage switchgear and controlgear for industrial use Control switches Position switches30 55 Dimensions and characteristics This European Standard EN50047 was given as from29June1984 the status of a British Standard. UDC 621.316.549:6
2、21.3.027.2:62-78BS6520:1984 This British Standard was published under the authorityofthe Board of BSI and comes into effect on 29June1984 BSI10-1999 The following BSI references relate to the work on this standard: Committee reference PEL/10 Draft for comment79/25618 DC ISBN 0 580 13918 2 Cooperatin
3、g organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the National Committees of the following countries. Austria Luxemburg Belgium Netherlands Denmark Norway Finland Portugal France Spain Germany
4、 Sweden Greece Switzerland Ireland United Kingdom Italy Amendments issued since publication Amd. No. Date of issue CommentsBS6520:1984 BSI 10-1999 i Contents Page Cooperating organizations Inside front cover Text of EN50047 3 National appendix A 8 National appendix B 8BS6520:1984 ii BSI 10-1999 A Br
5、itish 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 fr
6、ont cover, an inside front cover, pagesi andii, theEN title page, pages2 to9 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.EUROPEAN STANDARD NORME EUROPENNE EUROP
7、ISCHE NORM EN50047 Edition1 July1981 UDC 621.316.549:621.3.027.2:6278 Key words: Electrical switchgear and controlgear, industrial use, low voltage, control switch, switch, position switch, dimensions, characteristics, operation point English version Low voltage switchgear and controlgear for indust
8、rial use Control switches Position switches30 55 Dimensions and characteristics Appareillage industriel basse tension Auxiliaires de commande Interrupteurs de position30 55 Dimensions et caractristiques Industrielle Niederspannungs-Schaltgerte Hilfsstromschalter Positionsschalter30 55 Masse und Kenn
9、werte This European Standard was accepted by CENELEC on1981-07-07. 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
10、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
11、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
12、and UnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels Copyright reserved to all CENELEC membersEN50047:1981 BSI 10-19
13、99 2 Contents Page 1 Scope 3 2 Dimensions 3 3 Designation 7 4 Contact elements and terminal marking 7 5 Terminal for protective conductor 7 6 Degree of protection 7 Figure 1 Dimensions of enclosure 4 Figure 2 Roller lever actuator 5 Figure 3 Rounded plunger actuator 5 Figure 4 Roller plunger actuato
14、r 6 Figure 5 Roller lever arm 7BS6520:1984 BSI 10-1999 3 This European Standard has been prepared by the CENELEC Technical Committee TC17X. 1 Scope This standard applies to certain position switches with automatic return actuator for industrial use, the standardized dimensions of which and the chara
15、cteristics necessary for their application are given below. A larger size(42,5 80) is standardized in EN50041. Electrical characteristics shall conform to those of IEC Publication337 Control switches. This standard includes the four following types: roller lever (form A), rounded plunger (form B), p
16、lunger with roller (form C), roller lever arm (form E). The devices are fitted with either snap action designated (1) in clause3, or slow make and break, designated(2) in clause3, mechanisms. 2 Dimensions The dimensions shown in Figure 1, Figure 2, Figure 3, Figure 4 and Figure 5 are applicable to s
17、witches in a new condition. The operating point corresponds to the opening of the break-contact element. The operating point can drift during the life of the switch. The manufacturer shall specify the direction of the drift. The differential travel (difference between the operating and reset points)
18、 of a position switch with snap action mechanism shall be stated by the manufacturer; it is shown as H in Figure 2, Figure 3, Figure 4 and Figure 5, and differs dependent upon the type of actuator. Apart from the dimensions indicated, the design of these devices is not restricted. Dimensions are giv
19、en inmm.BS6520:1984 4 BSI 10-1999 2.1 Enclosure Figure 1 Dimensions of enclosureBS6520:1984 BSI 10-1999 5 2.2 Roller lever actuator (form A) 2.3 Rounded plunger actuator (form B) Figure 2 Roller lever actuator Figure 3 Rounded plunger actuatorBS6520:1984 6 BSI 10-1999 2.4 Roller plunger actuator (fo
20、rm C) Figure 4 Roller plunger actuatorBS6520:1984 BSI 10-1999 7 2.5 Roller lever arm (form E) 3 Designation Example of designation of a position switch30 55 with a roller lever actuator (form A) with snap action mechanisms(1): Position switch EN50047 A1. Example of designation of a position switch30
21、 55 with a roller lever arm (form E) with slow make and break mechanism(2): Position switch EN50047 E2. 4 Contact elements and terminal marking Position switches shall have a normally open and a normally closed contact (distinctive number11 in accordance with European Standard EN50005). The terminal
22、 marking shall be in accordance with European Standard EN50013. 5 Terminal for protective conductor Position switches with metal enclosures shall have a terminal for the protective conductor; this terminal shall be mounted inside the enclosure in the immediate vicinity of the cable entry and marked
23、as appropriate. 6 Degree of protection The minimum degree of protection required shall conform to IP65, tested in accordance with IEC-Publication529 or144 when this latter is revised. Figure 5 Roller lever armBS6520:1984 8 BSI 10-1999 National appendix A The United Kingdom participation in the prepa
24、ration of this European Standard was entrusted by the Power Electrical Engineering Standards Committee (PEL/-) to Technical Committee PEL/10 upon which the following bodies were represented: Association of Control Manufacturers TACMA (BEAMA Ltd) Association of Short Circuit Testing Authorities Assoc
25、iation of Supervisory and Executive Engineers BEAMA Transmission & Distribution Association ERA Technology Ltd Electrical Contractors Association Electricity Supply Industry in England and Wales Electronic Components Industry Federation Electrical Installation Equipment Manufacturers Association (BE
26、AMA Ltd) GAMBICA (BEAMA Ltd) Health and Safety Executive Institution of Electrical Engineers National Economic Development Office National appendix B The British Standards corresponding to the IEC Publications and European Standards referred to in EN50047 are as follows. a) With reference to clause1
27、, the various parts of IEC337 have been published as the following Parts and Sections of BS4794, “Specification for control switches (switching devices, including contactor relays, for control and auxiliary circuits, for voltages up to and including1000V a.c. and1200V d.c.)”. European Standard EN500
28、41:1981 has been published as BS6518:1984 Specification for low voltage switchgear and controlgear for industrial use. Control switches. Position switches42.5 80 Dimensions and characteristics IEC337-1:1970, BS4794-1:1979 IEC337-1A:1973 and IEC337-1B:1975 General requirements (Identical) IEC337-2:19
29、72 BS4794-2 Special requirements for specific types of control switches Section2.1:1977 Push-button and related control switches (Identical) IEC337-2A:1973 Section2.2:1977 Additional requirements for rotary control switches (Identical) IEC337-2B:1976 Sections2.3 and2.4:1977 Section2.3 Contactor rela
30、ys Section2.4 Pilot switches (Identical) IEC337-2C:1977 Sections2.5 and2.6:1977 Section2.5 Indicator lights Section2.6 Standardization of fixing hole of single hole mounted push-buttons and indicator lights (Identical)BS6520:1984 BSI 10-1999 9 b) With reference to clause4, the European Standards ref
31、erred to have been published as the following BritishStandards. EN50005:1976 published as BS5472:1977, Specification for low voltage switchgear and controlgear for industrial use. Terminal marking and distinctive number. General rules. EN50013:1977 published as BS5581:1978, Specification for low vol
32、tage switchgear and controlgear for industrial use. Terminal marking and distinctive number for particular control switches. c) With reference to clause6, the British Standards corresponding to the IEC Publications referred to are as follows. IEC144:1963 BS5420:1977 Specification for degrees of prot
33、ection of enclosures of switchgear and controlgear for voltages up to and including1000V a.c. and1200V d.c. (Identical) IEC529:1976 BS5490:1977 Specification for degrees of protection provided by enclosures (Identical)BS6520:1984 EN50047:1981 BSI 389 Chiswick High Road London W4 4AL BSIBritishStanda
34、rdsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions BritishStandards are updated by amendment or revision. Users of BritishStandar
35、ds should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this BritishStandard would inform the Secretary of the technical c
36、ommittee responsible, the identity of which can be found on the inside front cover. Tel:02089969000. Fax:02089967400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all B
37、SI, international and foreign standards publications should be addressed to Customer Services. Tel:02089969001. Fax:02089967001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as BritishStandards, unless otherwis
38、e requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and
39、services. Contact the Information Centre. Tel:02089967111. Fax:02089967048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel:
40、02089967002. Fax:02089967001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in
41、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 des
42、ignations. 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:02089967070.
