1、BRITISH STANDARD BS5992-6: 1984 Electrical relays Part6: Specification for the basic modules for the dimensions of general purpose all-or-nothing relays UDC621.318.5-544BS5992-6:1984 This BritishStandard, having been prepared under the directionof the General Electrotechnical Engineering Standards C
2、ommittee, waspublished under the authorityof the Board of BSIandcomes into effect on 31 May1984 BSI11-1999 The following BSI references relate to the work on this standard: Committee reference GEL/5 Draft for comment77/22764DC ISBN 0 580 13861 5 Committees responsible for this BritishStandard The pr
3、eparation of this BritishStandard was entrusted by the General Electrotechnical Engineering Standards Committee (GEL/-) to Technical Committee GEL/5 upon which the following bodies were represented: BEAMA Transmission and Distribution Association British Telecommunications Electricity Supply Industr
4、y in England and Wales Electronics Components Industry Federation Institution of Electrical Engineers Ministry of Defence Telecommunication Engineering and Manufacturing Association (TEMA) The following bodies were also represented in the drafting of the standards through subcommittees and panels: A
5、ssociation of Control Manufacturers TACMA (BEAMA) Association of Manufacturers Allied to the Electrical and Electronic Industry (BEAMA) Electronic Engineering Association Greater London Council National Supervising Inspectorate Society of British Aerospace Companies Limited Amendments issued since p
6、ublication Amd. No. Date of issue CommentsBS5992-6:1984 BSI 11-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 Location of terminal and fixing centres 2 4 Socket-mounted relays 4 5 Relays for printed circuit boards 5 6 Other relays 7 Figure 1 De
7、signation of external dimensions, fixing devices and terminals for relays 2 Figure 2 Example of location for the centres of terminals on one plane of the standard grid 3 Figure 3 Example of location for the terminal and fixing centres on two planes of the standard grid 3 Figure 4 Example of socket-m
8、ounted relay 4 Figure 5 Example of relay for printed circuit board 6 Figure 6 Example of possible location for the fixing centres on the standard grid 7 Table 1 Multipliers for socket-mounted relays 5 Table 2 Multipliers for relays for printed circuit boards 6 Table 3 Multipliers for other relays 8
9、Publications referred to Inside back coverBS5992-6:1984 ii BSI 11-1999 Foreword This Part of this BritishStandard, which has been prepared under the direction of the General Electrotechnical Engineering Standards Committee, is technically equivalent to IEC Publication255-18 “Electrical relays, Part1
10、8: Dimensions for general purpose all-or-nothing relays”, published in1982 by the International Electrotechnical Commission (IEC). Most of the text is identical to the international document. Where changes have been made this has been done to clarify the meaning of the text and to render the scope o
11、f the document more precise. Those Parts of IEC Publication255 “Electrical relays” which are concerned primarily with protection relays are incorporated where required into BS142“Electrical protection relays”. Other Parts of IEC Publication255 which are implemented as BritishStandards form, or will
12、form, Parts of this BritishStandard 1) . Some Parts of IEC Publication255 are designated first level documents, i.e.theycover the requirements of all relays within the scope of IEC Technical Committee No.41, Electrical relays. Other Parts of IEC Publication255 are designated lower level documents, i
13、.e.they are concerned with the requirements of a family of relays (second level) and of smaller and more specialized groups of relays within such a family (third and fourth level). According to this system of classification this is a third level document. A British Standard does not purport to inclu
14、de 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 comprises a front cover, an inside front cover, pagesi
15、 andii, pages1 to8, 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. 1) Parts of IEC255 that form part of the IEC Q Quality Assurance System wi
16、ll also carry a QC series number beginning with the digits16. The corresponding BritishStandards will then become Parts of BS9916.BS5992-6:1984 BSI 11-1999 1 1 Scope This Part of BS5992 specifies the basic dimensional modules to be used in determining the external dimensions of general purpose all-o
17、r-nothing relays and the location of their terminal and fixing centres. It applies equally to all such relays regardless of their type of construction (e.g.electromechanical, electronic, reed, etc.)and includes the height of the socket when the relay is socket-mounted. It also defines the external d
18、imensions and gives preferred values for these in terms of multiples of the specified modules. This standard does not apply to relays standardized by the International Organization for Standardization (ISO) (TC20, Aircraft and space vehicles) or to the internal construction of relays or to the size
19、of fixing arrangements and terminals (see flow-chart). The object of this standard is to state the following for the external dimensions and location of terminal and fixing centres for general purpose all-or-nothing relays: a) definitions (clause2); b) basic module and recommended multipliers (claus
20、e3) for: 1) socket-mounted relays (clause4); 2) relays for printed circuit boards (clause5); 3) other relays (clause6). All dimensions given in this standard are in millimetres. External dimensions are given in integer multiples of the basic module whose value is specified for the various types of r
21、elay. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this Part of BS5992 the following definitions apply. 2.1 general purpose relays general purpose relays are all types of electrical relays, independent of appli
22、cation, with fixing devices and terminalsBS5992-6:1984 2 BSI 11-1999 2.2 dimensions the external dimensions of relays together with their fixing devices and terminals are given in terms of the symbols marked in the general diagram of Figure 1 and the particular example of Figure 4 2.3 basic module m
23、odule is a unit of size used as an increment in modular co-ordination (ISO1791) the basic module M is a step in a grid system as shown in Figure 2 and Figure 3 3 Location of terminal and fixing centres The terminal and fixing centres, which may be on one or more planes, shall be located on, or mid-w
24、ay between, the intersections of the standard grid compatible with the particular surface of the relay(see4.2, 5.2.1, 6.1 and Figure 2 and Figure 3). NOTE to Figure 1 toFigure 4. In the figures Figure 1 Designation of external dimensions, fixing devices and terminals for relays a b c are the maximum
25、 dimensions of width, depth and height of the relay excluding terminals, sockets and fixing devices. a 1b 1c 1 (where applicable) are the nominal distances between the centres of the fixing points. (b 1and c 1are not shown in Figure 1). Example of b 1is shown in Figure 4. a 2b 2c 2 are the maximum o
26、verall dimensions of the relay including terminals, sockets and fixing devices, a 2 , b 2and c 2do not include any additional space which may be necessary when mounting due to environmental factors such as stray magnetic fields. a 2Xb 2 the area parallel to the mounting plane is defined as the mount
27、ing surface. c 3 is the total height of relay plus socket above the mounting plane (seeFigure 4) when both parts are correctly mated.BS5992-6:1984 BSI 11-1999 3 Figure 2 Example of location for the centres of terminals on one plane of the standard grid Figure 3 Example of location for the terminal a
28、nd fixing centres on two planes ofthestandard gridBS5992-6:1984 4 BSI 11-1999 4 Socket-mounted relays 4.1 General. Only relays designed as socket-mounted relays are dealt with. Relays for use on printed circuit boards, directly or with an intermediate socket, are dealt with in clause5. Figure 4 Exam
29、ple of socket-mounted relayBS5992-6:1984 BSI 11-1999 5 4.2 Basic module. The basic module for all dimensions shall be2.50mm. 4.3 Table of multipliers. Multipliers for socket-mounted relays shall be selected according to Table 1. Table 1 Multipliers for socket-mounted relays 5 Relays for printed circ
30、uit boards 5.1 General. Only relays designed for mounting on printed circuit boards directly or with an intermediate socket, are dealt with in this clause. NOTEDimensions of terminals are dealt with in5.6 of IEC Publication321:1970. 5.2 Basic module 5.2.1 The basic module for the mounting surface sh
31、all be2.50mm. 5.2.2 The basic module for the location of terminal and fixing centres shall be2.54mm in accordance with BS5830 (seeFigure 5). 5.2.3 The basic module for height c shall be2.50mm. For relays with c less than25mm, 4.3 of IECPublication321:1970 shall apply. 5.2.4 When the dimensions a 2 ,
32、 b 2 , or both a 2and b 2 , are less than5mm, the module for the relative dimension(s) shall be1.25mm. 5.3 Table of multipliers. Multipliers for relays for printed circuit boards shall be selected according to Table 2. Multipliers Corresponding value Dimensions n 4 5 6 7 mm 10.0 12.5 15.0 17.5 a 2 ,
33、 b 2 o o c 2 + c 3 + + 8 9 10 11 20.0 22.5 25.0 27.5 + + + + + + 12 13 14 15 30.0 32.5 35.0 37.5 o o o + o + 16 18 19 20 40.0 45.0 47.5 50.0 o + + o o 25 30 40 50 60 62.5 75.0 100.0 125.0 150.0 o + o o o o + o o o + o o + o Key +recommended and preferred o recommended not recommendedBS5992-6:1984 6
34、BSI 11-1999 Table 2 Multipliers for relays for printed circuit boards Figure 5 Example of relay for printed circuit board Multipliers Corresponding value mm Dimensions n 1 2 3 M = 2.54 2.54 5.08 7.62 M = 2.50 2.5 5.0 7.5 a 2 , b 2 o + c 2.5 4.0 5.0 o a o 4 5 6 10.16 12.70 15.24 10.0 12.5 15.0 o + o
35、6.3 8.0 10.5 o o 7 8 9 10 17.78 20.32 22.86 25.4 17.5 20.0 22.5 25.0 o + 13.5 16.5 20.0 25.0 o o o o 11 12 13 27.94 30.48 33.02 27.5 30.0 32.5 o + 14 15 16 18 35.56 38.10 40.64 45.72 35.0 37.5 40.0 45.0 o o o + o o 19 20 25 30 48.26 50.80 63.50 76.20 47.5 50.0 62.5 75.0 + o + o a For multipliers1 to
36、10, see4.3 of IEC Publication321:1970. Key +recommended and preferred o recommended not recommendedBS5992-6:1984 BSI 11-1999 7 6 Other relays 6.1 General. The basic module for all dimensions shall be2.50mm. 6.2 Table of multipliers. Multipliers for other relays shall be selected according to Table 3
37、. 6.3 Fixing centres. The fixing centres shall be on the intersections of the standard grid compatible with the mounting surface of the relay (a 2 b 2 ) as in Figure 6. NOTE 1The method of fixing (drilling and tapping etc.)should comply with British and ISO standards, if appropriate. NOTE 2The termi
38、nals should comply with the relevant British and IEC standards where appropriate. The following types of terminal are in use: a) screw terminals; b) solder tags; c) wire wrapped connections; d) tab terminals. Figure 6 Example of possible location for the fixing centres on the standard gridBS5992-6:1
39、984 8 BSI 11-1999 Table 3 Multipliers for other relays Multipliers Corresponding value Dimensions n 2 3 4 mm 5.0 7.5 10.0 a 2 , b 2 o c 2 c + 5 6 7 8 12.5 15.0 17.5 20.0 + o o o + o o o + 9 10 11 12 22.5 25.0 27.5 30.0 + o + o + 13 14 15 16 32.5 35.0 37.5 40.0 o o o o o o o 18 19 20 25 45.0 47.5 50.
40、0 62.5 + o o o o + 30 40 50 60 75.0 100.0 125.0 150.0 + o o o + o o o o o + Key +recommended and preferred o recommended not recommendedBS5992-6:1984 BSI 11-1999 Publications referred to BS5830, Specification for grid system for printed circuits. IEC321, Guidance for the design and use of components
41、 intended for mounting on boards with printed wiring and printed circuits. ISO1791, Building construction Modular co-ordination Vocabulary. BS5992-6: 1984 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishSta
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