1、- BSI BS*EN*b0255- 21-1 96 Lb24669 0.561847 140 A BRITISH STANDARD Electrical relays Part 21. Vibration, shock, bump and seismic tests on measuring relays and protection equipment Section 1. Vibration tests (sinusoidal) The European Standard EN 60255-21-1 : 1995 has the status of a British Standard
2、NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 1996 1988 60255-21-1 : EC 255-21-1 : h.corporating 4mendnaent No. 1 COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling ServicesBS EN 60255-21-1 : 1996 Issue 2, September 1996 N
3、ational foreword This Subsection of BS 142 has been prepared under the direction of the General Electrotechnical Engineering Standards Policy Committee. It is identical with IEC Publication 255-21-2 : 1988 Electrical relays. Part 21 : Vibration, shock, bump and seismic tests on measuring relays and
4、protection equipment. Section One-Vibration tests (sinusoidal), published by the the International Electrotechnical Commission (IEC). NOTE. This Subsection should be read in conjunction with BS 142 : Part O General introduction and list of Parts. In 1995 the European Committee for Electrotechnical S
5、tandardization (CENELEC) accepted IEC 255-21-1 : 1988 as European Standard EN 60255-21-1 : 1995. As a consequence of implementing the European Standard this British Standard is numbered as BS EN 60255-21-1 : 1996 and any reference to BS 142 Subsection 1.5.1 : 1989 should be read as reference to BS E
6、N 60255-21-1 : 1996. Cross-references international standard Corresponding British Standard BS 201 1 Basic environmental testing procedures Part 2.1 Tests Part 2.1 Fc : 1983 Test Fc. Vibration (sinusoidal) (Identical) IEC 68-2-6 : 1982 BS QC 160000 Harmonized system of quality assessment for electro
7、nic components. Electrical relays. Generic specification: electromechanical all-or-nothing relays IEC 255-7 : 1978 Part 1 : 1987 Test and measurement procedures (Identical) The international text refers to the International Electrotechnical Vocabulary. The corresponding British Standard is BS 4727 G
8、lossary of electrotechnical, power, telecommunication, electronics, lighting and colour terms, of which Part 1 : Group 03 Relay terminology is particularly relevant. However, terms specific to the needs of protection relays are to be found in BS 142 : Section 1.1. General references to IEC 255 in th
9、is context should be taken as equivalent to references to BS 142. The British Standard related to IS0 2041-1975 is BS 3015 Glossary of terms relating to mechanical vibration and shock. Compliance with a British Standard does not of itself confer immunity from legal obligations. COPYRIGHT European Co
10、mmittee for Electrotechnical StandardizationLicensed by Information Handling ServicesIssue 1, September 1996 BS EN 60255-21-1 : 1996 Summary of pages The following table identifies the current issue of each page. Issue 1 indicates that a page has been introduced for the hst time by amendment. Subseq
11、uent issue numbers indicate an updated page. Double vertical sidelining on replacement pages indicates the most recent changes (amendment, addition - deletion). Page Front cover Inside front cover a b EN cover page Foreword 1 2 3 4 Issue 2 2 1 blank 1 2 2 original original original Page I Issue 5 6
12、7 0 9 10 11 Annex ZA 12 Inside back cover Back cover original original original original original original 1 blank original 2 Change of identifier Wherever BS 142 : Subsection 1.5.1 : 1989 appears in this standard, it should be read as BS EN 60255-21-1 : 1996. a COPYRIGHT European Committee for Elec
13、trotechnical StandardizationLicensed by Information Handling ServicesA - EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60255-21-1 November 1995 ICs 29.120.70 Descriptors: Measuring relays, sinusoidal vibration tests English version Electrical relays Part 21: Vibration, shock, bump and seismic
14、 tests on measuring relays and protection equipment Section 1 : Vibration tests (sinusoidal) (IEC 255-21-1 : 1988) Relais lectriques Elektrische Relais Partie 21 : Essais de vibrations, de chocs, de secousses et de tenue aux sismes applicables aux relais de mesure et aux dispositifs de protection Se
15、ction 1 : Essais de vibrations Teil 21 : Schwing-, Schock-, Dauerschock- und Erdbebenprfungen an Merelais und Schutzeinrichtungen Hauptabschnitt 1 : Schwingprfungen (sinusfrmig) (sinusodales) (IEC 255-21-1 : 1988) (CE1 255-21-1 : 1988) This European Standard was approved by CENELEC on 1995-09-20; CE
16、NELEC members are bound to comply with the CENKENELEC Internal 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
17、application to the Centrai Secretariat or to any CENELEC member. 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 Secr
18、etariat has the same status as the official versions. CENELEC members 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. CENELE
19、C European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, 6-1050 Brussels 1995 Copyright reserved to CENELEC members Ref. No. EN 60255-21-1 : 1995 E COPYRIGHT Eur
20、opean Committee for Electrotechnical StandardizationLicensed by Information Handling Services BSI BS*EN*b0255- 21-3 96 W 3624669 0563853 673 I AEN 60255-21-1 : 1995 Issue 2, September 1996 Foreword The text of the International Standard IEC 255-21-1 : 1988, prepared by SC 41B), Measuring relays and
21、protection equipment, of IEC TC 41, Electrical relays, was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 60255-21-1 on 1995-09-20 wit hout any modification. The following dates were fixed: - latest date by which the EN has to be implemented at national level by publi
22、cation of an identical national standard or by - latest date by which the national standards conflicting with the EN have to be withdrawn endorsement (dop) 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 h
23、as been added by CENELEC. Endorsement notice The text of the International Standard IEC 255-21-1 : 1988 was approved by CENELEC as a European Standard without any modification. “IEC SC 41B has been replaced by IEC TC 95, Measuring relays and protection equipment. 11 8 BSI 1996 COPYRIGHT European Com
24、mittee for Electrotechnical StandardizationLicensed by Information Handling ServicesA BSI BS*EN#b0255- 21-1 96 1624b69 0561852 508 Issue 2. September 1996 EN 60255-21-1 : 1995 CONTENTS Page National foreword Inside front cover Committees responsible Back cover Clause 1 Scope 2 2 Object 2 3 Definitio
25、ns . 2 3.1 Vibration test (sinusoidal) . 3 3.2 Vibration response test 3 3.3 Vibration endurance test . 3 3.4 Fixing point (*) 3 3.6 Check point (*) 3 3.7 Reference point (*) . 3 3.8 Sweep-cycle (*) . 3 3.9 Distortion (*) . 4 3.10 Cross-over frequency . 4 3.1 1 Standard acceleration of gravity . 4 3
26、.5 Measuring points (*) 3 4 Requirements for vibration tests (sinusoidal) . 4 4.1 Test apparatus and mounting 4 4.2 Test severity classes 5 4.3 Test procedure 8 5 Criteria for acceptance . 9 5.1 Acceptance criteria for vibration response test 9 5.2 Acceptance criteria for vibration endurance test .
27、9 Appendix A Output circuit response during vibration response test 10 ZA (normative) Normative references to international publications with their corresponding European publications . 11 1 COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling Services -
28、BSI BS*EN*b0255- 21-1 76 1624667 0561853 444 = 255-21-1 (1) Q IEC ELECTRICAL RE LAYS Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment Section One: Vibration tests (sinusoidal) 1. Scope This standard is part of a series specifying the vibration, shock, bu
29、mp and seismic requirements applicable to measuring relays and protection equipment (with or without contacts). This standard includes two types of vibration tests: the vibration response test and the vibration endurance test, and is generafly based upon IEC 68-2-6. The requirements of this standard
30、 are applicable only to measuring relays and protection equipment in a new condition. The tests specified in this standard are type tests. 2. Obiect The object of this standard is to state: definitions of terms used; test conditions; standard test severity classes; test procedure; criteria for accep
31、tance. 3. Definitions For definitions of general terms not defined in this standard, . reference should be made to: - International Electrotechnical Vocabulary (JEW IEC SO; - relay standards published in the IEC 255 series; - IEC 68-2-6; - IS0 2041. For the purpose of this standard the following def
32、initions shall apply. Note.- Definitions marked with (*I are derived from IEC 68-2-6. 2 COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling ServicesBSI BS*EN*hD255- 21-1 Yb 1b24bb 05bL854 380 D 255-21-1 (1) IEC 3.1 Vibration test (sinusoidal) A test duri
33、ng which a specimen is submitted to sweeps of sinusoidal vibration in the three different axes of the specimen in turn, in terms of constant displacement and/or constant acceleration, within a stan- dard frequency range. Note.- The term “specimen“ includes any auxiliary part which is an integral fun
34、ctional feature of the measuring relay or protection equipment under test. 3.2 3.3 3.4 Vibration response test A vibration test carried out on a measuring relay or protection equipment, energized under specified conditions, to determine its response to normal service conditions. Vibration endurance
35、test A vibration test carried out on a non-energized measuring relay or protection equipment, with higher vibration levels than in normal service conditions, as an accelerated life test to simulate long-term vibration. This test also simulates some transportation conditions. Fixing point (*) Part of
36、 the specimen in contact with the fixture or vibration table at a point where the specimen is normally fastened in service. If a part of the real mounting structure is used as the fixture, the fixing points shall be taken as those of the mounting structure and not of the specimen. 3.5 Measuring poin
37、ts (*) The specific points at which data are obtained during the tests. They are of two main types: check point and reference point. 3.6 Check point (*) A measuring point located on the fixture, on the vibration table or on the specimen as close as possible and rigidly connected to one of its fixing
38、 points. 3.7 Reference point (*) A measuring point to control the test satisfied. 3.8 Sweep-cycle (*) A traverse of the for example 10 Hz to chosen from the check points whose signal is used so that the requirements of this standard are specified frequency range once in each direction, 150 Hz and 15
39、0 Hz to 10 Hz. 3 COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling Services255-21-1 (1) Q IEC 3.9 Distortion (*) x 100 (percentage) i- Distortion d = where: a1 u, = r.m.s. value of the acceleration at the driving frequency = total r.1n.s. value of the
40、applied acceleration (including the value of u,) 3.10 Cross-over frequency That frequency at which the characteristic of a vibration changes from a constant displacement value versus frequency to a constant acceleration value versus frequency. 3.11 Standard acceleration of gravity The standard accel
41、eration of gravity gn, where “n“ indicates normal, having the value of 9.81 m/sz. In practice this value may be rounded to 10 m/sz. 4. Requirements for vibration tests (sinusoidal) The main parameters of the vibration tests are the following: - frequency range; - acceleration; - displacement amplitu
42、de below the cross-over frequency, if any, - sweep rate and number of sweep cycles. 4.1 Test apparatus and mounting The required characteristics of the vibration generator and fixture together with the mounting requirements shall be as follows. The characteristics apply when the specimen is mounted
43、on the generator. 4. I . 1 Basic motion The basic motion shall be a sinusoidal function of time and such that the fixing points of the specimen move substantially in phase and in straight parallel lines along a specified axis, subjected to the limitations of Sub-clauses 4.1.2 and 4.1.3. 4.1 .2 Trans
44、verse motion The maximum vibration amplitude at the check points in any axis perpendicular to the specified axis shall not exceed 50% of the speci- fied amplitude for basis motion. COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling ServicesBSI BS*EN*b02
45、55- 21-1 96 lb24669 0563856 153 m 255-21-1 (1) IEC 4.1 .3 Distortion The acceleration distortion measurement shall be carried out at the reference point, which shall be declared by the manufacturer, and shall cover the frequencies u.p to 5 O00 Hz. The distortion as defined in Sub-clause 3.9 shall no
46、t exceed 250. In cases where a distortion value greater than 258 is obtained, the distortion shall be noted and agreed between manufacturer and user. 4.1.4 Vibration amplitude tolerances The actual vibration displacement and acceleration amplitude along the required axis of the reference point shall
47、 be equal to the specified value, within a tolerance of 1158. 4.1 .5 Frequency range tolerances The frequency range shall be equal to the specified values (Sub-clauses 4.2.1 and 4.2.2) within the following tolerances: - +1 Hz for the lower frequency 10 Hz; - 23 Hz for the upper frequency 150 Hz. 4.1
48、.6 Sweep The sweeping shall be continuous and the frequency shall change exponentially with time. The sweep rate shall be 1 octave per minute 5108. Note.- in particular cases a lower sweep rate can be chosen, e.g. for relays and protection equipment having . an operating time greater than 8 min. 4.1
49、 .7 Mounting The specimen shall be fastened to the vibration generator or fixture by its normal means of attachment in service so that the gravitational force acts on it in the same relative direction as it would in normal use. During the vibration response test, cable connections to the specimen shall be so arranged that they impose no more restraint or mass than they would when the specimen is installed in its operating position. Note.- Care should be taken to ensure that the specimen under test is not significantly affected by any magnetic field ge
