1、BRITISH STANDARD BS 4727-2: Group 13:1991 IEC 50(426): 1990 Glossary of Electrotechnical, power, telecommunication, electronics, lighting and colour terms Part 2: Terms particular to power engineering Group 13: Electrical apparatus for explosive atmospheresBS4727-2:Group 13:1991 This British Standar
2、d, having been prepared under the directionof the General Electrotechnical Standards PolicyCommittee, was publishedunder the authorityofthe Standards Boardand comes intoeffecton 28February 1991 BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference GEL/1 Dr
3、aft for comment 79/20465 DC ISBN 0 580 19456 6 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the General Electrotechnical Standards Policy Committee (GEL/-) to Technical Committee GEL/1, upon which the following bodies were represented: As
4、sociation of Consulting Engineers British Broadcasting Corporation Department of Trade and Industry (Radiocommunications Division) EEA (the Association of Electronics, Telecommunications and Business Equipment Industries) Electricity Supply Industry in United Kingdom Institute of Physics Institution
5、 of Electrical Engineers Amendments issued since publication Amd. No. Date CommentsBS4727-2:Group13:1991 BSI 08-1999 i ContentsPage Committees responsible Inside front cover National foreword ii Guide to the glossary iv 426-01 General terms 1 426-02 Physical and chemical phenomena 3 426-03 Areas and
6、 zones 7 426-04 Construction of electrical apparatus 9 426-05 Tests of electrical apparatus 11 426-06 Flameproof enclosures of electrical apparatus 12 426-07 Sand filled electrical apparatus 14 426-08 Increased safety electrical apparatus 14 426-09 Pressurized electrical apparatus 16 426-10 Oil imme
7、rsed electrical apparatus 17 426-11 Intrinsically-safe and associated electrical apparatus 18 Index 20BS4727-2:Group 13:1991 ii BSI 08-1999 National foreword This Group of BS 4727-2 has been prepared under the direction of the General Electrotechnical Standards Policy Committee and is identical with
8、 IEC50(426):1990 “International Electrotechnical Vocabulary Chapter426:Electrical apparatus for explosive atmospheres” published by the International Electrotechnical Commission (IEC). For ease of production purposes the definitions given in French and Russian have been retained, together with the t
9、ranslation of the terms (but not the definitions) given in German, Spanish, Italian, Dutch, Polish and Swedish. The glossary is divided into five Parts, each of which is subdivided into Groups. Each Group will comprise the terms and definitions used in a particular branch of electrical engineering a
10、nd will be issued individually as soon as it is completed. This arrangement makes it possible to add new Groups or review existing Groups at any time without affecting the remainder of the glossary. The five Parts of the glossary are as follows. Part 1: Terms common to power, telecommunications and
11、electronics; Part 2: Terms particular to power engineering; Part 3: Terms particular to telecommunications and electronics; Part 4: Terms particular to lighting and colour; Part 5: Terms particular to electromedical equipment. Fundamental and general terms common to power, telecommunications and ele
12、ctronics form Groups 01 and 02 of Part 1. Group 01 of Part 3 contains general terms. The specialist Groups (e.g. Groups 03 to 11 of Part 1) contain only the terms and definitions relating to their subject. As far as has been practicable all terms and definitions established in current usage and fall
13、ing within the scope of this glossary have been included. Experience has shown that it is rarely possible to replace, or even to modify, a well established term no matter what the logical or aesthetic shortcomings of that term may be. Current usage has therefore been accepted as the authority for te
14、rms and their meaning except where there has been a very good reason for doing otherwise, e.g. where terms have been considered to be fundamentally wrong, ambiguous, superfluous or in need of standardization. Where two or more synonymous terms are in use, those which are deprecated are omitted from
15、the body of the text but are entered in the alphabetical index with a cross-reference to the standard term. In cases where it was felt that the time was not yet right to deprecate a synonym, preferred terms are given first and the other terms are printed in less prominent type to indicate the intent
16、ion to deprecate them in the course of time. Where synonyms are considered of equal value they are shown in the same type. Where terms are used with different meanings in different branches of electrical engineering, appropriate definitions are given in the Groups of the glossary corresponding to th
17、ese branches. Such a definition, when taken out of the context of its Group, should if possible be quoted with a preamble indicating its proper context. It is to be noted that the given definition of a term represents the generally accepted meaning of that term. Under no circumstances should it be r
18、egarded as taking the place of a specification. As far as possible the terms are arranged in a logical order proceeding from the general to the specific and from the whole to the part, and allied terms are placed close together. In earlier editions of BS 4727, a special national numbering system was
19、 used, however, to facilitate publication of future editions of BS 4727, only the International Electrotechnical Vocabulary numbering system is used.BS4727-2:Group13:1991 BSI 08-1999 iii A general view of the position of the Group in the glossary can be obtained from the guide to the glossary. An al
20、phabetical index of the terms of each Group is provided at the end of each Group to facilitate reference to particular terms. It is recommended that the user of any Group of the glossary should consider the Group in association with the Groups covering general or fundamental terms within the Part an
21、d with Groups 01 and 02 of Part 1. In this glossary parentheses ( ) enclose words or phrases that are not part of the term or definition and can be omitted without affecting the meaning. Square brackets enclose words which may replace a preceding part of an expression. A British Standard does not pu
22、rport 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 comprises a front cover, an inside front
23、 cover, pagesi to vi, pages1to34 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.BS4727-2:Group 13:1991 iv BSI 08-1999 Guide to the glossary Part 1 Terms common to
24、power, telecommunications and electronics Group 01 Fundamental terminology Group 02 Electrical and magnetic devices terminology Group 03 Relay terminology Group 04 Measurement terminology Group 05 Semiconductor terminology Group 06 Electronic tube terminology Group 07 Magnetic materials and componen
25、ts Group 08 Piezo-electric device terminology Group 09 Radio interference terminology Group 10 Insulating solids, liquids and gases Group 11 Printed circuits. Titles to any further Groups will be added in due course. Part 2 Terms particular to power engineering. Group 01 General power terminology (w
26、ithdrawn) Group 02 Power electronics terminology Group 03 Rotating machinery terminology Group 04 Power transformers and reactors Group 05 Voltage fluctuation terminology Group 06 Switchgear and controlgear terminology (including fuse terminology) Group 07 Tariffs terminology Group 08 Electric cable
27、 terminology Group 09 Transducer terminology Group 10 Industrial electroheating terminology Group 11 Generation, transmission and distribution of electricity terminology Group 12 Telecontrol Group 13 Electrical apparatus for explosive atmospheres Group 14 Power capacitors Group 15 Overhead lines Tit
28、les to any further Groups will be added in due course. Part 3 Terms particular to telecommunications and electronics Group 01 General telecommunication and electronics terminology Group 02 Telephony terminology Group 03 Telegraphy, including facsimile, terminology Group 04 Broadcasting, radio and te
29、levision terminology Group 05 Propagation and media terminology Group 06 Radio location and navigation terminology Group 07 Radiocommunication terminology Group 08 Acoustics and electro-acoustics terminology Group 09 Waveguide terminology Group 10 Recording and reproduction of sound and video termin
30、ology Group 11 Space radiocommunications terminologyBS4727-2:Group 13:1991 BSI 08-1999 v Titles to any further Groups will be added in due course. Part 4 Terms particular to lighting and colour (withdrawn) Part 5 Terms particular to electromedical equipment Group 01 Radiology and radiological physic
31、s terminology Titles to any further Groups will be added in due course.vi blankBS4727-2:Group13:1991 BSI 08-1999 1BS4727-2:Group 13:1991 2 BSI 08-1999BS4727-2:Group13:1991 BSI 08-1999 3BS4727-2:Group 13:1991 4 BSI 08-1999BS4727-2:Group13:1991 BSI 08-1999 5BS4727-2:Group 13:1991 6 BSI 08-1999BS4727-2
32、:Group13:1991 BSI 08-1999 7BS4727-2:Group 13:1991 8 BSI 08-1999BS4727-2:Group13:1991 BSI 08-1999 9BS4727-2:Group 13:1991 10 BSI 08-1999BS4727-2:Group13:1991 BSI 08-1999 11BS4727-2:Group 13:1991 12 BSI 08-1999BS4727-2:Group13:1991 BSI 08-1999 13BS4727-2:Group 13:1991 14 BSI 08-1999BS4727-2:Group13:19
33、91 BSI 08-1999 15BS4727-2:Group 13:1991 16 BSI 08-1999BS4727-2:Group13:1991 BSI 08-1999 17BS4727-2:Group 13:1991 18 BSI 08-1999BS4727-2:Group13:1991 BSI 08-1999 1920 blankBS4727-2:Group13:1991 BSI 08-1999 21BS4727-2:Group 13:1991 22 BSI 08-1999BS4727-2:Group13:1991 BSI 08-1999 23BS4727-2:Group 13:19
34、91 24 BSI 08-1999BS4727-2:Group13:1991 BSI 08-1999 25BS4727-2:Group 13:1991 26 BSI 08-1999BS4727-2:Group13:1991 BSI 08-1999 27BS4727-2:Group 13:1991 28 BSI 08-1999BS4727-2:Group13:1991 BSI 08-1999 29BS4727-2:Group 13:1991 30 BSI 08-1999BS4727-2:Group13:1991 BSI 08-1999 31BS4727-2:Group 13:1991 32 BS
35、I 08-1999BS4727-2:Group13:1991 BSI 08-1999 33BS4727-2:Group 13:1991 34 BSI 08-1999blankBS 4727-2: Group 13:1991 IEC 50(426): 1990 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the U
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