EN 60255-21-2-1995 en Electrical Relays Part 21 Vibration Shock Bump and Seismic Tests on Measuring Relays and Protection Equipment Section 2 Shock and Bump Tests《继电器 第21部分 测量继电器和保.pdf
《EN 60255-21-2-1995 en Electrical Relays Part 21 Vibration Shock Bump and Seismic Tests on Measuring Relays and Protection Equipment Section 2 Shock and Bump Tests《继电器 第21部分 测量继电器和保.pdf》由会员分享,可在线阅读,更多相关《EN 60255-21-2-1995 en Electrical Relays Part 21 Vibration Shock Bump and Seismic Tests on Measuring Relays and Protection Equipment Section 2 Shock and Bump Tests《继电器 第21部分 测量继电器和保.pdf(33页珍藏版)》请在麦多课文档分享上搜索。
1、A BRITISH STANDARD Electrical relays Part 21. Vibration, shock, bump and seismic tests on measuring relays and protection equipment Section 2. Shock and bump tests The European Standard EN 60256-21-2 : 1995 has the status of a British Standard NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY
2、 COPYRIGHT LAW 3s EN 1996 1988 nColpM.ati?lg 50255-21-2 : EC 255-21-2 : 1mtNo. 1 COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling Services BSI BS*EN*b0255- 21-2 96 W 1624669 0561877 988 CENELEC members are bound to comply with the CENKENELEC Internal
3、Regulations which stipulate the conditions for giving this European Standard 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 Central Secretariat or to any CENELEC member
4、. This European Standard exists in three official versions (English, 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 Central Secretariat has the same status as the official versions. CENELEC m
5、embers are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit
6、 Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels I 1992 Copyright reserved to CENELEC members Ref. No. EN 60255-21-2 : 1995 E COPYRIGHT European Committee for Electrotechnical StandardizationLicensed
7、by Information Handling ServicesBSI BS*EN*b0255- 21-2 96 W 1624669 0561880 472 AEN 60256-21-2 : 1995 Issue 1, September 1996 Foreword The text of the International Standard Measuring relays and protection equipment, of IEC TC 41, Electrical relays, was submitted to the Unique Acceptance Procedure an
8、d was approved by CENELEC as EN 60255-21-2 on 1995-09-20 without any modification. The following dates were fixed: 1 IEC 255-21-2 : 1988, prepared by SC 41B), - latest date by which the EN has to be implemented at national level by publication of an identical national standard or by - latest date by
9、 which the national standards conflicting with the EN have to be withdrawn endorsement (dp) 1996-10-01 (dow) 1996-10-01 Annexes designated normative are part of the body of the standard, appendix A and annex ZA are normative. Annex ZA has been added by CEWELEC. COPYRIGHT European Committee for Elect
10、rotechnical StandardizationLicensed by Information Handling ServicesA Issue 2. September 1996 .EN 60255-21-2 : 1995 CONTENTS Page National foreword Inside front cover Committees responsible Back cover Clause 1 Scope . 2 2 Object 2 3 Definitions . 2 3.1 Shock test 3 3.2 Shock response test 3 3.3 Shoc
11、k withstand test . 3 3.4 Bump test . 3 4 Requirements for shock and bump tests 3 4.1 Test apparatus and mounting . 3 4.2 Shock test severity classes . 5 4.3 Bump test severity classes . 6 4.4 Recommendations for the selection of shock and bump test severity classes . 7 4.5 Test procedure for shock r
12、esponse test . 7 4.6 Test procedure for shock withstand test and bump test . 9 5 Criteria for acceptance . 9 5.1 Acceptance criteria for shock response test 9 5.2 Acceptance criteria for shock withstand test and for bump test . 10 Figures . 11 Appendix A Selection criteria for shock and bump test pa
13、rameters a) and output circuit response during shock response test b) 13 Annex ZA (normative) Normative references to international publications with their corresponding European publications . 14 1 COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling Ser
14、vices255-21-2 0 IEC ELECTRICAL RELAYS Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment SECTION TWO - SHOCK AND BUMP TESTS 1. Scope This standard is part of a series specifying the vibration, shock, bump and seismic requirements applicable to electromecha
15、nical and static measuring relays and protection equipment with or without output contacts. This standard includes two types of test: - - the bump test (on non-energized specimen), the shock test (on energized and non-energized specimen); and is generally based on IEC 68-2-27 and 68-2-29. The requir
16、ements of this standard are applicable only to measuring relays and protection equipment in new condition. The tests specified in this standard are type tests. 2. Object The object of this standard is to state: - definitions of terms used; - test conditions; - standard test severity classes; - test
17、procedure; - criteria for acceptance. 3. Definitions For definitions of general terms not defined in this standard, reference should be made to: - International Electrotechnical Vocabulary (IEV) IEC 501 ; - IEC 68-2-27 and 68-2-29; - relay standards published in the IEC 255 series; - IS0 2041; - Sec
18、tion One: Vibration tests (sinusoidal) IEC 255-21-11. For the purpose of this standard the following definitions shall apply: 2 COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling ServicesBSI BS*EN*hO255- 21-2 96 I1624669 0562883 I182 255-21-2 0 IEC 3.1
19、Shock test A test during which a specimen, non-energized or energized under specified conditions, is subjected to a limited number of single shocks, in the three different axes of the specimen in turn, to determine its capability to withstand the effects of shocks. Note.- The term “specimen“ include
20、s any auxiliary part which is an integral functional feature of the measuring relay or protec- tion equipment under test. 3.2 Shock response test A shock test carried out on a measuring relay or protection equip- ment, energized under specified conditions, to determine its response to shocks likely
21、to be occasionally encountered in service. 3.3 Shock withstand test A high level shock test carried out on a non-energized measuring relay or protection equipment to determine its capability to withstand shocks likely to be occasionally encountered during transportation and handling. 3.4 Bump test A
22、 test during which a non-energized measuring relay or protection equipment is subjected to a limited number of bumps, in three different axes of the specimen in turn, to determine its capability to withstand thP effects of bumps iikely to be encountered during trans- portation. 4. Requirements for s
23、hock and bump tests The main parameters of the shock and bump tests are the following: - acceleration; - - number of pulses applied. duration of the nominal pulse; In this standard the pulse shape used is one half-cycle of a sine wave. 4.1 Test apparatus and mounting The required characteristics of
24、the shock and bump generators and fixtures together with the mounting requirements shall be as specified in the following sub-clauses. The characteristics shall apply when the specimen is mounted on the generator. 4.1 . 1 Acceleration tolerances The nominal pulse shape for shock and bump tests shall
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