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1、BRITISH STANDARD BS 9151:1972 Incorporating Amendment Nos. 1 and 2 Rules for the Preparation of Detail Specifications for All-or-nothing Electromechanical Relays of Assessed Quality Full and Basic Assessment Levels UDC 621.318.5 Licensed Copy: London South Bank University, London South Bank Universi
2、ty, Fri Dec 08 02:06:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9151:1972 This British Standard, having been approved by the Telecommunication Industry Standards Committee, was published under the authority of the Executive Board on 31 August 1972 BSI 09-1999 The following BSI references relat
3、e to the work on this standard: Committee reference ELE/TLE/3/2 Draft for comment 70/30036 Word Processing Centre reference ZZ902 ISBN 0 580 07032 8 Co-operating organizations The Telecommunication Industry Standards Committee, under whose supervision this British Standard was prepared, consists of
4、representatives from the following Government departments and scientific and industrial organizations: British Broadcasting CorporationInstitution of Electrical and Electronic British Electrical and Allied Manufacturers Technician Engineers Association*Institution of Electrical Engineers British Rad
5、io Equipment Manufacturers Institution of Electronic and Radio Engineers AssociationInstitution of Production Engineers British Radio Valve Manufacturers Ministry of Aviation Supply* AssociationMinistry of Defence British Railways BoardMinistry of Defence, Army Department Cable and Wireless LimitedM
6、inistry of Defence, Navy Department Crown Agents for Oversea Governments and Ministry of Defence, Procurement AdministrationsExecutive* Department of Employment (HM Factory Post Office* Inspectorate)Radio and Electronic Component Department of Trade and IndustryManufacturers Federation* Electrical C
7、ontractors Association (Inc.)Relay Services Association of Great Britain Electrical Research AssociationScience Research Council Radio and Space Electricity Council, the Generating Board andResearch Station the Area Boards in England and Wales*Scientific Instrument Manufacturers Electronic Engineeri
8、ng Association*Association Electronic Valve and Semi-Conductor Society of British Aerospace Companies Ltd. Manufacturers Association*Telecommunication Engineering and Home OfficeManufacturing Association* Independent Television Authority The Government departments and scientific and industrial organ
9、izations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Association of Consulting EngineersNational Coal Board Engineering Equipment Users AssociationUnited Kingdom Atomic Ene
10、rgy Authority Amendments issued since publication Amd. No.Date of issueComments 3191November 1979 4237February 1983Indicated by a sideline in the margin Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:06:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9151:1
11、972 BSI 09-1999i Contents Page Co-operating organizationsInside front cover 1Introduction1 2Scope1 3Ratings1 4Characteristics1 5Codings for variants2 6Ordering information2 7Marking of relays and packages2 8Additional information2 9Inspection requirements2 Table 1 Full assessment level3 Table 1A Ins
12、pection requirements for alternative procedure for qualification approval at the full assessment level6 Table 2 Basic assessment level7 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:06:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9151:1972 ii BSI 09-199
13、9 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 British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprise
14、s a front cover, an inside front cover, pages i and ii, pages 1 to 8 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. Licensed Copy: London South Bank University, L
15、ondon South Bank University, Fri Dec 08 02:06:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9151:1972 BSI 09-19991 1 Introduction An all-or-nothing relay is one intended to be energized by a quantity having a value either higher than that at which it pulls in (or operates) or lower than that at w
16、hich it drops out (or releases). This British Standard shall be read and used in conjunction with Section 2 of BS 9150:1971, “Electrical relays Of assessed quality”, which gives the general rules for the preparation of detail specifications for relays. The object of all general rules given in Sectio
17、n 2 of BS 9150 is to ensure that detail specifications for relays are broadly similar as regards their subject matter and presentation. The object of the additional rules given in this standard is to ensure that all detail specifications for all-or-nothing electromechanical relays are closely simila
18、r (see also BS 9150, Appendix C). 2 Scope This British Standard lists the ratings, characteristics, inspection requirements and supplementary information for all-or-nothing electromechanical relays which are to be included as minimum mandatory requirements, in accordance with the general rules given
19、 in Section 2 of BS 9150, in any detail specification for these relays. A complete detail specification is, therefore, a combination of the requirements of both documents. Its purpose is to describe fully the particular relay so that the detail specification can be used for contractual purposes in t
20、he procurement of relays, for acceptance test purposes and for circuit design and equipment maintenance purposes. Requirements for both full and basic assessment levels are covered in this standard. The rules given in this standard do not apply to relays for specialized applications. The rules for s
21、uch specialized applications are given in other standards in the series BS 9152 BS 9199. 3 Ratings (see 2.1.5 of BS 9150) The following ratings shall be given: 1) Coil(s) (as in 2.1.5 of BS 9150) a) Rated voltage and/or current for each coil variant at 20 C unless otherwise stated. Optionally for a
22、family of relays of the same basic form rated nominal coil power see Section 1.1.3 item 27) may be given for each different contact action. b) Rated range of voltage and/or current for each coil variant at 20 C unless otherwise stated. Optionally for a family of relays of the same basic form rated r
23、ange of nominal coil power see Section 1.1.3 item 27) may be given for each different contact action. c) Resistance for d.c. relays or impedance for a.c. relays with tolerance, referred to 20 C unless otherwise stated. d) Frequency for a.c. relays. e) Insulation resistance and measurement voltage. f
24、) Voltage proof test voltages (see BS 9150, Procedure 1002). 2) Contacts (resistive load) as 2.1.5 of BS 9150. a) Number and description of contact units. b) The minimum and maximum contact voltage. c) The minimum and maximum contact current. d) The maximum rated load at which b and c apply: in W fo
25、r d.c. relays and V A for a.c. relays e) The insulation resistance and measurement voltage. f) Voltage proof test voltage. 3) Special operating circuit conditions, if any. 4) Environmental limitations (as required by tests in Table 1 or Table 2) a) Climatic category. b) Shock. c) Acceleration. d) Vi
26、bration. e) Low air pressure (including voltage limitations). f) Any other limitations 4 Characteristics (see 2.1.6 of BS 9150) The following characteristics, at 20 C or as otherwise stated, shall be given: 1) Performance values and limits as required (see BS 9150, Procedure 1005). 2) Contact-circui
27、t resistance, and points of measurement. 3) Maximum speed of operating and duty cycle. 4) Mass. The remaining characteristics shall be as given in 2.1.6 of BS 9150 with the addition of: Maximum speed of operation and duty cycle, where applicable. Licensed Copy: London South Bank University, London S
28、outh Bank University, Fri Dec 08 02:06:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9151:1972 2 BSI 09-1999 5 Codings for variants All variants shall be given a clear and unambiguous code, e.g. for contact variants, coil variants, mounting including whether earthed or unearthed, and termination
29、variants including finish; and an example of its use shall be given. In any table or drawing in which variants are involved, the appropriate variant codings shall be listed. 6 Ordering information (see 1.1.15 and 2.1.9 of BS 9150) 1) Quantity. 2) The BS and issue number of the detail specification.
30、3) The appropriate variant code (see clause 5). 7 Marking of relays and packages Relays and their package shall be marked in accordance with 1.1.6 of BS 9150. 8 Additional information (see 2.1.8 of BS 9150) The following supplementary information may be given in order to clarify the detail specifica
31、tion: 1) Drawings. 2) Application data and notes. Such information is not required to be verified by inspection and test procedures. 9 Inspection requirements (see 2.2 of BS 9150) The following shall be given for Groups A, B, C and D inspection requirements. Samples submitted to tests which are mark
32、ed “(D)” shall not be accepted for release under BS 9000 (see 20.2 of BS 9000-1:1981). The inspection levels (ILs) and acceptable quality levels (AQLs) to be quoted in the detail specification shall be as stated in Table 1 and Table 2 of this specification, which cover full and basic assessment leve
33、ls respectively. Tests in subgroup A0 may be carried out in any order appropriate to the production line requirements of a manufacturer. All tests in other subgroups shall be carried out in the order stated in this standard. Tests indicated by * may be included in Group C, instead of Group B where c
34、onsidered appropriate. The inspection requirements for the alternative procedure for qualification approval at the full assessment level are given in Table 1A. Unless otherwise specified in the detail specification, a maximum quantity of 34 specimens shall be grouped and tested in the sequence indic
35、ated in Table 1A. In the event of a test failure in Group 0, all the tests in that group may be repeated on a further specimen taken from the same production batch. There shall be no further failures in Group 0. For subsequent groups, accept on one failure and reject on two failures. Subgroups 2.1,
36、2.2 and 2.3 comprise a single group for the accept/reject criterion. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:06:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9151:1972 BSI 09-19993 Table 1 Full assessment level InspectionBS 9150 Reference and condi
37、tions of testLimits to be specified at this point GROUP ASubgroups A1 to A5 are not applicable Subgroup A0100 % Inspection Visual inspection Contact-circuit resistance Sealing Coil resistance Voltage proof Insulation resistance Performance characteristics 1.2.2 1004 1.2.6.4 1001 1002 1003 1005 Coil
38、voltage or current; contact test current; open circuit voltage Method; Leak rate Temperature; ohms at specified temperature Test voltage; a.c. or d.c. Minimum duration 1 s Test voltage Saturation value Pull-in value Drop-out value (The above shall be given in tabular form) Maximum Min. and Max. Mini
39、mum GROUP B Subgroup B1 Dimensions1.2.3 Subgroups B3 to B6 are not applicable. To be conducted on a sampling basis, lot-by-lot Inspection level S-4, AQL 4.0 % Subgroup B2 Solderabilitya Robustness of terminationsa Final measurements Visual inspection Insulation resistance Coil resistance Contact cir
40、cuit resistance 1.2.6.12 1.2.6.13 1.2.2 1003 1001 1004 Inspection level S-4, AQL 4.0 % Method Test appropriate to termination Tensile load (Test Ua) As Group A As Group A As Group A Minimum Min. and Max. Maximum Subgroup B7 Electrical endurance (low level) 1.2.7.3 Inspection level S-4, AQL 1.5 % Rat
41、ed coil voltage; operations; speed and duty cycle; monitored contact circuit resistance, maximum value: Allowable number of failures Subgroup B8 CTR information1.1.11The results of the test in subgroup B7 shall be presented as attributes information on the CTR if so required by the detail specificat
42、ion GROUP CSubgroups C1 and C4 are not applicable a These tests may be included in Group C instead of Group B where considered appropriate. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:06:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9151:1972 4 BSI 09-
43、1999 Table 1 Full assessment level InspectionBS 9150 Reference and conditions of testLimits to be specified at this point Subgroup C2 Timing tests (d.c. relays only) Contact bounce time (d.c. relays only) 1006 1007 Inspection level S-4, AQL 4.0 % Coil voltage Load; coil voltage Pull-in time (max.);
44、drop-out time (max.) Bounce time (max.) Subgroup C3 (D) Bump Climatic sequence (Procedure 1 of BS 2011:1967: Test Z/ABDM) Final measurements Visual inspection Insulation resistance Contact circuit resistance Sealing 1.2.6.15 1.2.6.17 1.2.2 1003 1004 1.2.6.4 Inspection level S-3, AQL 4.0 % Method 1:4
45、000 bumps total; peak acceleration; mounting; temperature Severity, temperature and duration of low pressure test. Applicable contact load and contact circuit resistance (as applicable) As Group A As Group A Method Minimum Max. twice subgroup A0 limit Leakage rate (Method 2) Subgroup C5 (D) Limited
46、electrical endurance Final measurements Insulation resistance Contact circuit resistance 1.2.7.1 1003 1004 Inspection level S-3, AQL 4.0 % Operations; maximum rated load; test applicable to pattern; temperature; duty cycle; speed; coil voltage; contact resistance failure level. For a light duty rela
47、y not claiming low level capability 1.2.7.1 may be performed additionally with contacts loaded at specified minimum voltage and current As Group A As Group A measured at maximum rated load Minimum Maximum Subgroup C6 CTR information1.11.1The results of the tests in subgroup C3 shall be presented as
48、attributes information on the CTR and the tests in subgroup C2 and C5 shall be presented as measurements information GROUP D Subgroup D1 (D) Vibration Final measurements Visual inspection Insulation resistance Contact circuit resistance 1.2.6.11 1.2.2 1003 1004 To be conducted on a sampling basis at
49、 yearly intervals Inspection level S-3, AQL 4.0 % Severity and duration; coil voltage or current; contact loading; mounting; frequency range As Group A As Group A Minimum Max. twice subgroup A0 limit Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:06:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9151:1972 BSI 09-19995 Table 1 Full assessment level InspectionBS 9150 Reference and conditions of testLimits to be specified at this point Subgroup D2 (D) (i) Electrical endurance (other than low level) 1.2.7