1、BRITISH STANDARD BS5472:1977 EN50005 Specification for Low voltage switchgear and controlgear for industrial use Terminal marking and distinctive number General rules This European Standard EN50005 was given as from31 May1977 the status of a British Standard UDC 621.316.54.027.2:003.62BS5472:1977 Th
2、is British Standard was published under the authorityofthe Executive Boardon 31May1977 BSI07-1999 The following BSI references relate to the work on this standard: Committee referencePEL/92/1 Draft for comment74/25003DC ISBN 0 580 09542 8 Cooperating organizations The European Committee for Electrot
3、echnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises theNational Committees of the following countries. Austria Italy Belgium Netherlands Denmark Norway Finland Portugal France Sweden Germany Switzerland Ireland UnitedKingdom Amendments issued si
4、nce publication Amd. No. Date of issue CommentsBS5472:1977 BSI 07-1999 i Contents Page Cooperating organizations Inside front cover 1 Scope 3 2 General 3 3 Terminal marking of impedances (alphanumerical) 3 4 Terminal marking of contact elements for switching devices with two positions (numerical) 5
5、5 Terminal marking of overload protection devices 7 6 Distinctive number 8 National appendix A Inside back coverBS5472:1977 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 applicati
6、on. 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, theEN title page, pages2 to8, an inside back cover and a back cover. This standard has been updated (see co
7、pyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN50005 Edition1 September1976 UDC 621.316.54.027.2:003.62 Key words: Electrical switchgear and controlgear industrial use
8、 low voltage terminal marking distinctive number induction coil release indicating light device main contact element auxiliary contact element English version Low voltage switchgear and controlgear for industrial use Terminal marking and distinctive number General rules Appareillage industriel basse
9、 tension. Marquage des bornes et nombre caracteristique. Rgles gnrales Industrielle Niederspannungsschaltgerte. Anschlussbezeichnungen und Kennzahlen. Allgemeine Regeln This European Standard was accepted by CENELEC on7 September1976. CENELEC members are committed in accordance with CENELEC Internal
10、 Regulations to give this European Standard the status of a National Standard without any alteration. Up-to-date lists and bibliographical references concerning such NationalStandards may be obtained on application to the CENELEC GeneralSecretariat or to any CENELEC member. This European Standard ex
11、ists in three versions (English, French, German), recognized by CENELEC as equivalent. National versions in other languages rank as translations, and in case of doubt shall be checked against one of the recognized versions. CENELEC members are the national electrotechnical committees of Austria, Bel
12、gium, Denmark, Finland, France, Germany, Ireland, Italy, Netherlands, Norway, Portugal, Sweden, Switzerland and UnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secr
13、etariat: rue de Stassart 35, B-1050 Brussels Copyright reserved to all CENELEC members2 blankEN50005 BSI 07-1999 3 This European Standard has been prepared by the CENELEC Technical Committee17X. 1 Scope This standard applies to switchgear and controlgear for industrial use having rated voltages not
14、exceeding1000 V a.c. and1200 V d.c. It is based on the uniform system of terminal marking specified in IEC-Publication445-1973 1) . The use of this system is recommended for the terminal marking of devices which are frequently contained in low voltage switchgear and controlgear assemblies, when such
15、 marking is a requirement of the relevant equipment standard or is usual practice. Where an identifying colour, in accordance with a recognized system, is applied to an apparatus terminal, the correlation between this colour and the equivalent graphical symbol or the alphanumerical notation accordin
16、g to this standard shall, where necessary, be recorded on an associated drawing or document. This standard forms the general rules. Additional European standards will give the rules for particular types of devices such as contactor relays, contactor auxiliary contacts, control switches, etc. The ter
17、minal marking applies to devices as delivered by the manufacturer. 2 General 2.1 The terminal marking of an apparatus shall be free from ambiguity, i.e.each marking shall occur onlyonce. 2.2 The marking of different terminals of a circuit element shall indicate that they are in the same currentpath.
18、 2.3 The marking of the terminals of an impedance (e.g.coil) are always alphanumerical. Capitals (uppercase) are preferably used. Where small (lower case) letters are used, they have the same significance as the corresponding capitals. 2.4 The marking of the terminals of a contact element is always
19、numerical. One of the terminals is marked with an odd number, the other terminals of the same contact element are marked with the immediately higher even numbers. 2.5 If incoming and outgoing terminals of an element are to be specially identified as such, then the lower number shall be chosen for th
20、e incoming (e.g.incoming11 and outgoing12, incoming A1 and outgoing A2). NOTEThe position of the terminals shown in the examples is not intended to convey any information on the actual position of the terminals on the device itself. 3 Terminal marking of impedances (alphanumerical) 3.1 Coils 3.1.1 T
21、he two terminals of a coil for an electromagnetically operated drive shall be marked by A1 and A2. Terminals marking A1 and A2 shall replace marking a and b, which were largely used in practice. A1corresponds to a or A and A2 to b or B. 1) The reference to the corresponding national standard may be
22、added when this national standard is in accordance with CENELEC H.D.241.EN50005 4 BSI 07-1999 3.1.2 For a coil with tappings, the terminals of the tappings are marked in sequential order A3, A4, etc. Examples: 3.1.3 For a coil having two windings, the terminals of the first winding shall be marked A
23、1, A2 and of the second winding B1, B2. 3.2 Motors. When the terminals of an electric motor drive are to be specifically identified as such, the IECPublication34-8 or the harmonized national standard shall be applied. Example: 3.3 Electromagnetic releases 3.3.1 Shunt release. The two terminals of a
24、shunt release shall be marked C1 and C2. 3.3.2 Under voltage release. The two terminals of an under voltage release shall be marked D1 and D2. 3.4 Interlocking electromagnets. The two terminals of an interlocking electromagnet shall be marked E1 and E2. EN50005 BSI 07-1999 5 3.5 Indicating light dev
25、ices. The two terminals of an indicating light device shall be marked X1 and X2. Examples: NOTEThe term “indicating light devices” includes any incorporated resistor or transformer. 4 Terminal marking of contact elements for switching devices with twopositions (numerical) 4.1 Contact elements for ma
26、in circuits (Main contact elements). The terminals of main switching elements are identified by single figure numbers. Each terminal marked by an odd number is associated with that terminal marked by the following even number. Examples: When a switching device has more than5 main contact elements, a
27、lphanumerical marking shall be chosen, according to IEC-Publication445 or the national harmonized standard. 4.2 Contact elements for auxiliary circuits (Auxiliary contact elements). The terminals of auxiliary contact elements are identified by two-figure numbers: the figure of the units is a functio
28、n number the figure of the tens is a sequence number. 4.2.1 Function number 4.2.1.1 Function number1 and2 are allocated to break-contact elements and function numbers3 and4 to make-contact elements. (Break-contact element, make-contact element as defined in IEC-Publication50-441). The terminals of c
29、hange-over contact elements are marked by the function numbers1,2 and4. EN50005 6 BSI 07-1999 4.2.1.2 Auxiliary contact elements with special functions, e.g.time-delayed auxiliary contact elements, are identified by the function numbers5 and6,7 and8 for break-contact elements and make-contact elemen
30、ts respectively. Examples: The terminals of change-over contact elements with special functions are marked by the function numbers5,6 and8. Example: 4.2.2 Sequence number 4.2.2.1 Terminals belonging to the same contact elements are marked with the same sequence numbers. All contact elements having t
31、he same function shall have different sequence numbers. Examples: Break-contact delayed on closing Make-contact delayed on closing Change-over contact delayed in both directionsEN50005 BSI 07-1999 7 4.2.2.2 The sequence number may be omitted from the terminals only if additional information provided
32、 by the manufacturer or the user clearly gives such number. Examples: NOTEfor4.2. The dots shown in the above examples are merely used to show the relationship and do not need to be used in practice. 5 Terminal marking of overload protection devices The terminals of the main circuits of an overload
33、protection device are identified in the same manner as the terminals of main switching elements. Examples: The terminals of an auxiliary contact element of an overload protection device are identified in the same manner as the terminals of a special contact element (clause4.2.1.2) but with the seque
34、nce number9. If a second sequence number is required, it should be the number0. Examples: EN50005 8 BSI 07-1999 6 Distinctive number A device with a fixed number of make-contact elements and break-contact elements may be allocated atwo-figure “distinctive number”. The first figure indicates the numb
35、er of make-contact elements and the second figure the number of break-contact elements. Example: Device with3 make-contacts and1 break-contact. Distinctive number 31BS5472:1977 BSI 07-1999 National appendix A The United Kingdom participation in the preparation of this European Standard came under th
36、e authority of the Power Electrical Engineering Standards Committee of BSI. This committee consists of representatives from the following bodies. Association of Short-Circuit Testing Authorities* British Electrical and Allied Manufacturers Association* British Railways Board* Department of Energy (E
37、lectricity) Electrical Contractors Association Electrical Contractors Association of Scotland Electrical Research Association* Electricity Supply Industry in England and Wales* Engineering Equipment Users Association* Institution of Electrical Engineers* Ministry of Defence* National Coal Board* Tra
38、des Union Congress The Government department and scientific and industrial 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 (BEAMA) Associatio
39、n of Supervisory and Executive Engineers Control and Automation Manufacturers Association (BEAMA) Copper Development Association Department of the Environment (PSA) Electrical Installation Equipment Manufacturers Association (BEAMA) Electrical Power Engineers Association London Transport Executive N
40、orthern Ireland Electricity Service Oil Companies Materials Association Radio and Electronic Component Manufacturers Association Transmission and Distribution Association (BEAMA)BS5472:1977 EN 50005 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent nation
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