BS-EN-62052-21-2004.pdf
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1、BRITISH STANDARD BS EN 62052-21:2004 Incorporating Corrigendum No. 1 Electricity metering equipment (a.c.) General requirements, tests and test conditions Part 21: Tariff and load control equipment The European Standard EN 62052-21:2004 has the status of a British Standard ICS 91.140.50 ? Licensed C
2、opy: sheffieldun sheffieldun, na, Mon Nov 13 16:36:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 62052-21:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 21 January 2005 BSI 12 December 2005 ISBN 0 580 45280 8 National foreword Thi
3、s British Standard is the official English language version of EN 62052-21:2004. It is identical with IEC 62052-21:2004. This standard, in conjunction with BS EN 62054-11 supersedes BS EN 61037:1993, and in conjunction with BS EN 62054-21 supersedes BS EN 61038:1993, both of which will be withdrawn
4、on 1 July 2007. The UK participation in its preparation was entrusted to Technical Committee PEL/13, Electricity meters, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which im
5、plement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication
6、does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/Euro
7、pean committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages
8、2 to 48, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments 15616 Corrigendum No. 1 12 December 2005Correction to supersession details Licensed Copy: sheffie
9、ldun sheffieldun, na, Mon Nov 13 16:36:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 62052-21 NORME EUROPENNE EUROPISCHE NORM December 2004 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elek
10、trotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62052-21:2004 E ICS 91.140.50 Partially supersedes EN 61037:1992 + A1:1996 + A2:1998 personal sa
11、fety against effects of excessive temperature; protection against spread of fire; protection against penetration of solid objects, dust and water. All parts, which are subject to corrosion under normal working conditions shall be effectively protected. Any protective coating shall not be liable to d
12、amage by ordinary handling, or damage due to exposure to air, under normal working conditions. Tariff and load control equipment shall have adequate mechanical strength and shall withstand the elevated temperature which is likely to occur in normal working conditions. The components shall be reliabl
13、y fastened and secured against loosening. Page 15 EN 6205221:2004 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:36:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI The construction of tariff and load control equipment shall be such as to minimize the risks of short-circuiting of the insulat
14、ion between live parts and accessible conducting parts due to accidental loosening or unscrewing of the wiring, screws, etc. NOTE For tariff and load control equipment for special use in corrosive atmospheres, additional requirements shall be fixed in the purchase contract (for example, salt mist te
15、st according to IEC 60068-2-11). 5.2 Case 5.2.1 Requirements Tariff and load control equipment shall have a case which can be sealed in such a way that the internal parts of the equipment are accessible only after breaking the seal. The case shall be designed according to protective class I or II. T
16、he cover shall not be removable without the use of a tool. The case shall be so constructed and arranged that any non-permanent deformation cannot prevent the satisfactory operation of the tariff and load control equipment. Unless otherwise specified, tariff and load control equipment intended to be
17、 connected to a supply mains where the voltage under reference conditions exceeds 250 V to earth, and whose case is wholly or partially made of metal, shall be provided with a protective earth terminal. 5.2.2 Mechanical tests The case shall be subjected to the following tests. NOTE The back-up power
18、 supply, if any, shall remain connected. 5.2.2.1 Spring hammer test The mechanical strength of the tariff and load control equipment case shall be tested with a spring hammer (test Ehb, see IEC 60068-2-75). The tariff and load control equipment shall be mounted in its normal working position and the
19、 hammer shall act on the outer surfaces of the tariff and load control equipment cover and on the terminal cover with a kinetic energy of 0,2 J 0,02 J. The result of the test is satisfactory if the tariff and load control equipment case and terminal cover do not sustain damage, which could affect it
20、s function and if it is not possible to touch live parts. Slight damage, which does not impair the protection against indirect contact or the penetration of solid objects, dust and water is acceptable. 5.2.2.2 Shock test The test shall be carried out according to IEC 60068-2-27, under the following
21、conditions: tariff and load control equipment in non-operating condition, without the packing; half-sine pulse; peak acceleration: 30 gn; (300 m/s2); duration of the pulse: 18 ms. After the test, the tariff and load control equipment shall show no damage or change of information and shall operate co
22、rrectly in accordance with the requirements of the relevant standard. Page 16 EN 6205221:2004 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:36:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 5.2.2.3 Vibration test The test shall be carried out according to IEC 60068-2-6, under the followin
23、g conditions: tariff and load control equipment in non-operating condition, without the packing; frequency range: 10 Hz to 150 Hz; transition frequency: 60 Hz; f 60 Hz constant acceleration 9,8 m/s2 (1 g); single point control; number of sweep cycles per axis: 10. NOTE Ten sweep cycles = 75 min. Aft
24、er the test, the tariff and load control equipment shall show no damage or change of information and shall operate correctly in accordance with the requirements of the relevant standard. 5.3 Window If the cover is not transparent, one or more windows shall be provided for reading the display and obs
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