1、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 thestatus of a Britis
2、h Standard UDC 621.316.54:621.3.027.2:621.315.684:003.62BS6272:1982 This British Standard was published under the authority ofthe Board of BSIand comes intoeffecton 30September1982 BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference PEL/10 Draft for comm
3、ent 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: Austria Luxemburg Belgium Netherlands Denmark
4、 Norway Finland Portugal France Spain Germany Sweden Greece Switzerland Ireland United Kingdom Italy Amendments issued since publication Amd. No. Date of issue CommentsBS 6272:1982 BSI 07-1999 i Contents Page Cooperating organizations Inside front cover Foreword 2 Text of EN 50 042 3 National append
5、ixA 8 National appendix B 8 Publications referred to Inside back coverBS6272:1982 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 doe
6、s 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, theENtitle 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
7、 incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE 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, ter
8、minals, 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 basse tension Marquage des bornes Bornes
9、pour les composants de circuit lectronique et pour les contacts extrieurs associs Industrielle Niederspannungs-Schaltgerte Anschlussbezeichnungen Klemmen zum Anschluss zugehriger, aussenliegender elektronischer Bauelemente und Kontakte This European Standard was accepted by CENELEC on 1980-12-11. Th
10、e 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
11、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
12、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 S
13、tandardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels Copyright reserved to all CENELEC membersEN50 042 BSI 07-1999 2 Foreword Switchgear and controlgear may be given a terminal marking
14、 in accordance with the general rules of the European Standard EN 50 005. This standard gives additional requirements. Contents Foreword 2 1 Scope 3 2 Marking of terminals for external associated electronic circuit components and contacts 3 3 Marking of terminals of a complete device 5EN 50 042 BSI
15、07-1999 3 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
16、 are a supplement to the general rules for the marking: of control supply terminals (seeEN50005,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
17、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 ext
18、ernal 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
19、be marked by using the letter Z and two-figure numbers, the first figure being a sequence number.EN50 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,
20、 T2, . . . or 1T1, 1T2, . . . and2T1, 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 bridg
21、e between two terminals is considered as a permanently closed contact and the corresponding terminals shall be marked Y1 and Y2.EN 50 042 BSI 07-1999 5 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
22、 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-
23、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. Switc
24、hing 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.EN50 042 6 BSI 07-1999 Example 2. Switching device having: two control supply terminals A1, A2 four ter
25、minals 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 ass
26、ociated 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. EN 50 042 BSI 07-1999 7 Example 4. Switching device having: two control supply terminals A1, A2 two terminals Y1, Y2 for an exter
27、nal 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. BS6272:1982 8 BSI 07-1999 National appendix A The United Kingdom participation in the preparation of this European Standard came under
28、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
29、 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
30、 & 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 wo
31、rk 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 Engineerin
32、g 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.BS 6272:1982 BSI 07-1999 Publications referred to BS 5472 EN 50 005, Specifica
33、tion 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. BS6272:1982 EN 50 042 BSI 389 Chis
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