1、BRITISH STANDARD BS EN 60255-21-1: 1996 IEC 255-21-1: 1988 Incorporating Amendment No. 1 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
2、 a British StandardBSEN60255-21-1:1996 This British Standard, having been prepared under the directionof the General Electrotechnical Engineering Standards Policy Committee, waspublished under the authorityof the Board of BSI andcomes into effect on 30November 1989 BSI 07-1999 The following BSI refe
3、rences relate to the work on this standard: Committee reference GEL/5 Draft for comment 86/27034 DC ISBN 0 580 17986 9 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the General Electrotechnical Standards Policy Committee (GEL/) to Technica
4、l Committee GEL/5, upon which the following bodies were represented: British Telecommunications plc Electricity Supply Industry in England and Wales Electronic Components Industry Federation Transmission and Distribution Association (BEAMA Limited) The following body was also represented in the draf
5、ting of the standard, through subcommittees and panels: Association of Consulting Engineers Amendments issued since publication Amd. No. Date of issue Comments 9095 September 1996 Indicated by a sideline in the marginBSEN60255-21-1:1996 BSI 07-1999 i Contents Page Committees responsible Inside front
6、 cover National foreword ii Foreword 2 Text of EN 60255-21-1 3 Publications referred to Inside back coverBSEN60255-21-1:1996 ii BSI 07-1999 National foreword This Subsection of BS142 has been prepared under the direction of the GeneralElectrotechnical Engineering Standards Policy Committee. It is id
7、entical with IEC Publication255-21-2:1988 “Electrical relays Part21:Vibration, shock, bump and seismic tests on measuring relays and protection equipment Section 1: Vibration tests (sinusoidal) ”, published by thethe International Electrotechnical Commission (IEC). NOTEThis Subsection should be read
8、 in conjunction with BS142-0 “General introduction and listofParts”. In 1995 the European Committee for Electrotechnical Standardization (CENELEC) accepted IEC255-21-1:1988 as European Standard EN60255-21-1:1995. As a consequence of implementing the European Standard this British Standard is numbere
9、d as BSEN60255-21-1:1996 and any referenceto BS142 Subsection 1.5.1:1989 should be read as reference to BSEN60255-21-1:1996. The international text refers to the International Electrotechnical Vocabulary. The corresponding British Standard is BS4727 Glossary of electrotechnical, power, telecommunica
10、tion, electronics, lighting and colour terms, of which Part1:Group03 Relay terminology is particularly relevant. However, terms specific to the needs of protection relays are to be found in BS142-1.1. General references to IEC255 in this context should be taken as equivalent to references to BS142.
11、The British Standard related to ISO2041:1975 is BS3015 Glossary of terms relating to mechanical vibration and shock. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a
12、British Standard does not of itself confer immunity from legal obligations. Cross-references International standard Corresponding British Standard BS 2011 Basic environmental testing procedures Part 2.1 Tests IEC 68-2-6:1982 Part 2.1 Fc:1983 Test Fc. Vibration (sinusoidal) (Identical) BS QC 160000 H
13、armonized system of quality assessment for electronic components. Electrical relays. Generic specification: electromechanical all-or-nothing relays IEC 255-7:1978 Part 1:1987 Test and measurement procedures (Identical) Summary of pages This document comprises a front cover, an inside front cover, pa
14、ges i and ii, theEN title page, pages2 to 8, an inside back cover and a back cover. This 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.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM
15、EN 60255-21-1 November 1995 ICS 29.120.70 Descriptors: Measuring relays, sinusoidalvibration tests English version Electrical relays Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment Section 1: Vibration tests (sinusoidal) (IEC 255-21-1:1988) Relais lectr
16、iques Partie 21: Essais de vibrations, de chocs, de secousses et de tenue aux sismesapplicables aux relais de mesureetauxdispositifs de protection Section1: Essais de vibrations (sinusodales) (CEI 255-21-1:1988) Elektrische Relais Teil 21: Schwing-, Schock-, Dauerschock- und Erdbebenprfungen anMerel
17、ais und Schutzeinrichtungen Hauptabschnitt 1: Schwingprfungen (sinusfrmig) (IEC 255-21-1:1988) This European Standard was approved by CENELEC on1995-09-20; CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard t
18、he 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. This European Standard exists in three official versions (English, French, G
19、erman). 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 members are the national electrotechnical committees of Austria, Belgium, Denma
20、rk, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechni
21、sche Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1995 Copyright reserved to CENELEC members Ref. No. EN 60255-21-1:1995 EEN60255-21-1:1995 BSI 07-1999 2 Foreword The text of the International Standard IEC 255-21-1:1988, prepared by SC41B 1)Measuring relays and protection equipme
22、nt, of IECTC41, Electrical relays, was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN60255-21-1 on1995-09-20 without any modification. The following dates were fixed: Annexes designated “normative” are part of the body of the standard, Appendix A and Annex ZA are norm
23、ative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC255-21-1:1988 was approved by CENELEC as a European Standard without any modification. Contents Page Foreword 2 1 Scope 3 2 Object 3 3 Definitions 3 3.1 Vibration test (sinusoidal) 3 3.2 Vibration
24、 response test 3 3.3 Vibration endurance test 3 3.4 Fixing point (*) 3 3.5 Measuring points (*) 3 3.6 Check point (*) 3 3.7 Reference point (*) 3 3.8 Sweep-cycle (*) 3 3.9 Distortion (*) 3 3.10 Cross-over frequency 4 3.11 Standard acceleration of gravity 4 4 Requirements for vibration tests (sinusoi
25、dal) 4 4.1 Test apparatus and mounting 4 4.2 Test severity classes 4 4.3 Test procedure 5 5 Criteria for acceptance 6 5.1 Acceptance criteria for vibration responsetest 6 5.2 Acceptance criteria for vibration endurance test 6 Appendix A Output circuit response duringvibration response test 7 Annex Z
26、A (normative) Normative references to international publications with their corresponding European publications 8 Table I Vibration response test parameters for different severity classes 5 Table II Vibration endurance test parameters for different severity classes 5 Table III Guide for selection of
27、 test severity classes 5 1) IEC SC 41B has been replaced by IECTC95, Measuring relays and protection equipment. latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1996-10-01 latest date by which the national st
28、andards conflicting with the EN have to be withdrawn (dow) 1996-10-01EN60255-21-1:1995 BSI 07-1999 3 1 Scope This standard is part of a series specifying the vibration, shock, bump and seismic requirements applicable to measuring relays and protection equipment (with or without contacts). This stand
29、ard includes two types of vibration tests: the vibration response test and the vibration endurance test, and is generally based upon IEC68-2-6. The requirements of this standard are applicable only to measuring relays and protection equipment in a new condition. The tests specified in this standard
30、are type tests. 2 Object The object of this standard is to state: definitions of terms used; test conditions; standard test severity classes; test procedure; criteria for acceptance. 3 Definitions For definitions of general terms not defined in this standard, reference should be made to: Internation
31、al Electrotechnical Vocabulary (IEV) IEC 50; IEC 68-2-6; relay standards published in the IEC 255 series; ISO 2041. For the purpose of this standard the following definitions shall apply. NOTEDefinitions marked with (*) are derived from IEC68-2-6. 3.1 vibration test (sinusoidal) a test during which
32、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 standard frequency range NOTEThe term “specimen” includes any auxiliary part which is an integral functional feature
33、 of the measuring relay or protection equipment under test. 3.2 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 3.3 vibration endurance test a vibration tes
34、t 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 3.4 fixing point (*) part of the specimen in
35、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 points (*) the specific
36、 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 points 3.7 referenc
37、e point (*) a measuring point chosen from the check points whose signal is used to control the test so that the requirements of this standard are satisfied 3.8 sweep-cycle (*) a traverse of the specified frequency range once in each direction, for example 10Hz to 150Hz and150Hz to 10Hz 3.9 distortio
38、n (*) where: a 1 = r.m.s. value of the acceleration at the driving frequency a tot = total r.m.s. value of the applied acceleration (including the value of a 1 ) Distortion d 2 tot 2 1 1 -100 (percentage) =EN60255-21-1:1995 4 BSI 07-1999 3.10 cross-over frequency that frequency at which the characte
39、ristic 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 acceleration of gravity g n , where “n” indicates normal, having the value of9.81m/s 2 . In practice this value may b
40、e rounded to10m/s 2 4 Requirements for vibration tests (sinusoidal) The main parameters of the vibration tests are the following: frequency range; acceleration; displacement amplitude below the cross-over frequency, if any, sweep rate and number of sweep cycles. 4.1 Test apparatus and mounting The r
41、equired characteristics of the vibration generator and fixture together with the mounting requirements shall be as follows. The characteristics apply when the specimen is mounted on the generator. 4.1.1 Basic motion The basic motion shall be a sinusoidal function of time and such that the fixing poi
42、nts 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 Transverse motion The maximum vibration amplitude at the check points in any axis perpendicular to the specified axis shall not ex
43、ceed50% of the specified amplitude for basis motion. 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 up to5000Hz. The distortion as defined in Sub-clause 3.9 shall not e
44、xceed25%. In cases where a distortion value greater than25% 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 be e
45、qual to the specified value, within a tolerance of 15%. 4.1.5 Frequency range tolerances The frequency range shall be equal to the specified values (Sub-clauses4.2.1 and 4.2.2) within the following tolerances: 1Hz for the lower frequency10Hz; 3Hz for the upper frequency150Hz. 4.1.6 Sweep The sweepin
46、g shall be continuous and the frequency shall change exponentially with time. The sweep rate shall be1 octave per minute 10%. NOTEin particular cases a lower sweep rate can be chosen, e.g. for relays and protection equipment having an operating time greater than8min. 4.1.7 Mounting The specimen shal
47、l 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 i
48、mpose no more restraint or mass than they would when the specimen is installed in its operating position. NOTECare should be taken to ensure that the specimen under test is not significantly affected by any magnetic field generated by the vibration system. 4.2 Test severity classes The vibration res
49、ponse test and the vibration endurance test include three different severity classes (0,1,2), the main parameters of which are referred to in Sub-clauses 4.2.1 and 4.2.2 below. For particular types of measuring relays or protection equipment, the manufacturer may declare different severity classes for the vibration response test and the vibration endurance test. When Class0 is declared, no vibration tests apply. 4.2.1 Vibration response test The frequency range for
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