BS-7998-3-2002-VERSION-1 IEC-60027-3-1989-HD-245.3-S3-2001.pdf
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1、BRITISH STANDARD BS 7998-3:2002 HD 245.3 S3: 2001 IEC 60027-3: 1989 Letter symbols to be used in electrical technology Part 3: Logarithmic quantities and units ICS 01.075; 29.020 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: London South Bank University, Londo
2、n South Bank University, Fri Dec 08 10:00:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7998-3:2002 This British Standard, having been prepared under the direction of the Management Systems Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strateg
3、y Committee on 30 January 2002 BSI 30 January 2002 The following BSI reference relates to work on this standard: Committee reference SS/7 ISBN 0 580 38563 9 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee SS/7, General me
4、trology, quantities, units and symbols, upon which the following bodies were represented: British Measurement and Testing Association City University DTI National Weights and Measures Laboratory Federation of Small Businesses Institute of Measurement and Control Institution of Electrical Engineers I
5、nstitution of Mechanical Engineers National Physical Laboratory Royal Society of Chemistry Society of Chemical Industry Trading Standards Institute Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:00:50
6、GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7998-3:2002 BSI 30 January 2002 i Contents National forewordii Scope and Introduction3 1Logarithmic quantities3 2Units for logarithmic quantities6 3Numerical values of logarithmic quantities7 4Logarithmic quantities with units8 5Notation for expressing t
7、he reference of a level11 Annex ZA (normative) Normative references to international publications with their corresponding European publications 13 National annex NA (normative) Amendment 1 to International Standard IEC 60079-3:198914 Licensed Copy: London South Bank University, London South Bank Un
8、iversity, Fri Dec 08 10:00:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7998-3:2002 ii BSI 30 January 2002 National foreword This British Standard reproduces verbatim the English language content of IEC 60027-3:1989, published by International Electrotechnical Commission (IEC). This British Stan
9、dard is also in agreement with Harmonized Document HD 245.3 S3:2001, which was published by the European Committee for Electrotechnical Standardization (CENELEC). National annex NA reproduces verbatim Amendment 1 to IEC 60027-3:1989, published March 2000. IEC 60027 consists of general and specific p
10、arts with purely electric character, under the title Letter symbols to be used in electrical technology. Only the specific parts with electric character will be published in this series, as the general parts will be harmonized with the ISO 31 series (to form ISO 80000 series) including Part 1. Other
11、 parts comprise: Part 2: Telecommunications and electronics; Part 3: Logarithmic quantities and units. This British Standard has been numbered Part 3 to reflect the fact there are other parts in the IEC series. A British Standard does not purport to include all the necessary provisions of a contract
12、. 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, pages i and ii, the HD title page, the HD foreword,
13、 pages 3 to 15 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:00:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI HARMONIZATION DOCUMENTHD 245.3 S
14、3 DOCUMENT DHARMONISATION HARMONISIERUNGSDOKUMENTJuly 2001 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2001 CENELEC -All rig
15、hts of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. HD 245.3 S3:2001 E ICS 01.060Supersedes HD 245.3 S2:1991 English version Letter symbols to be used in electrical technology Part 3: Logarithmic quantities and units (IEC 60027-3:1989 + A1:2000) Symboles
16、 littraux utiliser en lectrotechnique Partie 3: Grandeurs et units logarithmiques (CEI 60027-3:1989 + A1:2000) Formelzeichen fr die Elektrotechnik Teil 3: Logarithmische Gren und Einheiten (IEC 60027-3:1989 + A1:2000) This Harmonization Document was approved by CENELEC on 2001-05-01. CENELEC members
17、 are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for implementation of this Harmonization Document on a national level. Up-to-date lists and bibliographical references concerning such national implementation may be obtained on application to the Central S
18、ecretariat or to any CENELEC member. This Harmonization Document exists in three official versions (English, French, German). CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembou
19、rg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:00:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Foreword The text of the International Standard IEC 60027-3:1989 + A1:2000, prep
20、ared by IEC TC 25, Quantities and units, and their letter symbols, was submitted to the formal vote and was approved by CENELEC as HD 245.3 S3 on 2001-05-01 without any modification. This Harmonization Document supersedes HD 245.3 S2:1991. The following dates were fixed: latest date by which the exi
21、stence of the HD has to be announced at national level(doa) 2001-10-01 latest date by which the HD has to be implemented at national level by publication of a harmonized national standard or by endorsement(dop) 2002-04-01 latest date by which the national standards conflicting with the HD have to be
22、 withdrawn(dow) 2004-04-01 Annexes designated “normative“ are part of the body of the standard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60027-3:1989 + A1:2000 was approved by CENELEC as a Harmonizati
23、on Document without any modification. _ BS 79983:2002 2 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:00:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 79983:2002 3 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:0
24、0:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 79983:2002 4 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:00:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 79983:2002 5 Licensed Copy: London South Bank University, London South Bank University, Fri Dec
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- BS-7998-3-2002-VERSION-1 IEC-60027-3-1989-HD-245.3-S3-2001 BS 7998 2002 VERSION IEC 60027 1989 HD 245.3
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