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1、BRITISH STANDARD BS 5271:1988 EN 50010:1987 Specification for Low-voltage switchgear and controlgear for industrial use Inductive proximity switches Methods for measuring the operating distance and operating frequency This European Standard EN 50010 has the status of a British Standard. UDC: 621.316
2、.542.9:621.3.011.3:621.3.027.2:621.317.3.08:621.3.064 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 12:23:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5271:1988 This British Standard, having been prepared under the direction of the Power Electrical Engineering Standards Committee, was p
3、ublished under the authority of the Board of BSI and comes into effect on 29 January 1988 BSI 12-1999 First published July 1976 First revision January 1988 The following BSI references relate to the work on this standard: Committee reference PEL/10 Draft for comment 84/29153 DC ISBN 0 580 16456 X Co
4、operating 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 Germ
5、anySweden GreeceSwitzerland IrelandUnited Kingdom Italy Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 12:23:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5271:1988 BSI 12-1999i Contents Page Cooperating organizationsInside
6、 front cover National forewordii 1Scope3 2Methods for measuring the operating distance3 3Method for measuring the operating frequency f3 Figure 1 Method for measuring the operating distances3 Figure 2 Output signal of the inductive proximity switch for direct current during the measurement of operat
7、ing frequency f4 Figure 3 Method for measuring the operating frequency4 National appendix AInside back cover National appendix BInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 12:23:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5271:1988 ii BSI 12-1999 National foreword T
8、his British Standard has been prepared under the direction of the Power Electrical Engineering Standards Committee and is the English language version of EN 50010:1987 “Low-voltage switchgear and controlgear for industrial use. Inductive proximity switches. Methods for measuring the operating distan
9、ce and operating frequency” published by the European Committee for Electrotechnical Standardization (CENELEC). This standard supersedes BS 5271:1976 which is withdrawn. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsi
10、ble 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 4, an inside back cover and a back cover. This
11、 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, Mon Dec 04 12:23:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPE
12、NNE EUROPISCHE NORM EN 50010 October 1987 UDC: 621.316.542.9:621.3.011.3:621.3.027.2:621.317.3.08:621.3.064 Key words: Low-voltage equipment; inductive proximity switches; measuring method; operating frequency; operating distance English version Low voltage switchgear and controlgear for industrial
13、use. Inductive proximity switches. Methods for measuring the operating distance and operating frequency Appareillage industriel basse tension. Dtecteurs de proximit inductifs. Mthodes de mesure de la porte et de la frquence de commutation Industrielle Niederspannung-Schaltgerte. Induktive Nherungs-s
14、chalter. Meverfahren zur Ermittlung des Schaltabstandes und der Schaltfrequenz This European Standard was ratified by CENELEC on 3 December 1985. CENELEC members are bound to comply with the requirements of the CENELEC Internal Regulations which stipulate the conditions for giving this European Stan
15、dard the status of a national standard without any alteration. 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 exists in three official versions (Engl
16、ish, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CENELEC General Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of:
17、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 Comit Europen de Normalisation Electrotechnique Europisches Komitee fr
18、 Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels CENELEC 1987 Copyright reserved to all CENELEC members Ref. No. EN 50010:1987 E Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 12:23:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 blank Licensed Copy: sheffi
19、eldun sheffieldun, na, Mon Dec 04 12:23:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50010:1987 BSI 12-19993 This European standard was prepared by the Technical Committee 17B of CENELEC. 1 Scope This standard applies only to inductive proximity switches. 2 Methods for measuring the operating di
20、stance 2.1 Construction of the target The target is a square made of mild steel, Fe 360, according to Euronorm 271), having a thickness of 1 mm. The length a of the side of the square is equal to: either the diameter of the circle inscribed on the active surface of the sensitive face, or three times
21、 the rated operating distances sn, whichever is the greater. 2.2 Static measurement As shown in Figure 1, the target is moved slowly towards the proximity switch in an axial direction and the operating distance is measured. The appropriate European Standard for the inductive proximity switch will gi
22、ve values of the voltage and temperature. 3 Method for measuring the operating frequency f 3.1 Dynamic measurement As shown in Figure 3, the targets are fixed on the front (method 1) or sides (method 2) of teeth on a rotating disc, the spaces between the teeth being 2a, in such a manner that they ca
23、n pass in front of the sensitive face of the proximity switch at a distance equal to half of the rated operating distance sn. Each target shall have the same dimensions as that defined in 2.1. The output signal of the proximity switches is measured with the speed of rotation of the disc increasing f
24、rom 0. An illustration of the output signal of proximity switches is given in Figure 2. With the speed increasing, the durations t1 and t2 decrease. The operating frequency f is determined from the following formula: For proximity switches for direct current, the rated value of the operating frequen
25、cy is obtained when t1 or t2 correspond to 50 4s, or when the characteristics of the output signal, in the “on” or “off” states, reach the values specified in the particular standard. For proximity switches for alternating current, the rated value of the operating frequency is obtained when either t
26、1 or t2 corresponds to one half-period of the supply frequency (fb). 1) Each country may indicate its own equivalent symbol. f 1 t1t2+ - -= Figure 1 Method for measuring the operating distances Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 12:23:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
27、 EN 50010:1987 4 BSI 12-1999 Figure 2 Output signal of the inductive proximity switch for direct current during the measurement of operating frequency f Figure 3 Methods for measuring the operating frequency Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 12:23:09 GMT+00:00 2006, Uncontrolled
28、 Copy, (c) BSI BS 5271:1988 BSI 12-1999 National appendix A The United Kingdom participation in the preparation 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: ASTA
29、 Certification Services Association of Manufacturers Allied to the Electrical and Electronic Industry (BEAMA Ltd) British Gas Plc Electrical Contractors Association Electrical Installation Equipment Manufacturers Association (BEAMA Ltd) Electricity Supply Industry in England and Wales Electronic Com
30、ponents Industry Federation ERA Technology Ltd GAMBICA (BEAMA Ltd) Health and Safety Executive Institution of Electrical Engineers National appendix B Euronorm 27 has not been implemented as a British Standard, but details of the Fe 360 steel referred to in clause 4 of EN 50010 are contained in Euro
31、norm 25 and ISO 630:1980. A related British Standard to Euronorm 25 and ISO 630 is BS 4360:1980. NOTEISO 630 is under revision and the proposed draft changes the designation of the steel Fe 360 to E 235. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 12:23:09 GMT+00:00 2006, Uncontrolled Cop
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40、ude 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, Mon Dec 04 12:23:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI