BS-7689-1993 IEC-60703-1981.pdf
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1、BRITISH STANDARD BS 7689:1993 IEC 703:1981 Test methods for electroheating installations with electron guns (Implementation of CENELEC HD 440 S1) UDC 621.365.91.001.2.001.4.004.12(083.71) Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:43:02 GMT+00:00 2006, U
2、ncontrolled Copy, (c) BSI BS 7689:1993 This British Standard, having been prepared under the direction of the Power Electrical Engineering Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 September 1993 BSI 10-1999 The following BSI ref
3、erences relate to the work on this standard: Committee reference PEL/87 Draft for comment 83/20872 DC ISBN 0 580 22250 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Power Electrical Engineering Standards Policy Committee (PEL/-) to T
4、echnical Committee PEL/87, upon which the following bodies were represented: Association of Manufacturers allied to the Electrical and Electronic Industry (BEAMA Ltd.) British Glass Manufacturers Confederation British Industrial Furnace Constructors Association British National Committee for Electro
5、heat British Steel plc Electric Trace Heating Industry Council (ETHIC) Electricity Association Energy Industries Council Engineering Equipment and Materials Users Association Engineering Industries Association Health and Safety Executive Induction and Dielectric Heating Manufacturers Association Ins
6、titution of Electrical Engineers Lighting Industry Federation Ltd. Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:43:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7689:1993 BSI 10-1999i Contents Pag
7、e Committees responsibleInside front cover National forewordii Text of HD 440 S13 National annex NA (informative) Cross-referenceInside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:43:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7689:1993 ii
8、 BSI 10-1999 National foreword This British Standard has been prepared under the direction of the Power Electrical Engineering Standards Policy Committee. It is identical with IEC 703:1981 Test methods for electroheating installations with electron guns, published by the International Electrotechnic
9、al Commission (IEC). This standard also implements Harmonization Document HD 440 S1:1983 which was published by the European Committee for Electrotechnical Standardization (CENELEC). A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards
10、 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, pages 2 to 6, an inside back cover and a bac
11、k 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, London South Bank University, Fri Dec 08 11:43:02 GMT+00:00 2006, Uncontrolled
12、Copy, (c) BSI HARMONIZATION DOCUMENT DOCUMENT DHARMONISATION HARMONISIERUNGDOKUMENT HD 440 S1 September 1983 UDC 621.365.91.001.2.001.4.004.12(083.71) Descriptors: Electric heating; furnaces; electron beam English version Test methods for electroheating installations with electron guns Mthodes dessa
13、i des installations lectrothermiques comportant des canons lectrons Prfverfahren fr Elektrowrme-anlagen mit Elektronenkanonen This Harmonization Document was approved by CENELEC on 1983-09-07. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the condition
14、s for implementation of this Harmonization Document on a national level. Up-to-date lists and bibliographical references concerning national implementation may be obtained on application to the Central Secretariat or to any CENELEC member. This Harmonization Document exists in three official version
15、s (English, French, German). CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for
16、Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1983 Copyright reserved to CENELEC members Ref. No. HD 440 S1:1983 E Licensed Copy: London South Bank University,
17、 London South Bank University, Fri Dec 08 11:43:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7689:1993 BSI 10-1999 2 Contents Page 1Scope3 2Object3 3Definitions3 4General test requirements3 5Test methods4 6Test intervals5 Licensed Copy: London South Bank University, London South Bank University,
18、 Fri Dec 08 11:43:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7689:1993 BSI 10-19993 1 Scope This standard applies to electroheating installations comprising one or more electron guns as heating source. 2 Object The object of this standard is the standardization of test methods to determine the
19、 essential parameters and the technical data and characteristics of electroheating installations comprising one or more electron guns. The standard does not contain a mandatory list of tests and is not restrictive. Tests may be selected from the proposed list. The specification established by agreem
20、ent between the user and the manufacturer of electron beam heating installations can supplement these recommendations but should not be in contradiction with them. 3 Definitions The following definitions apply for the purposes of this standard. For definitions of fundamental and general terms in the
21、 field of electroheating, the reader should refer to Chapter 841 of the International Electrotechnical Vocabulary (I.E.V.). 3.1 cathode an electrode that is the source of the desired electron emission 3.2 anode an electrode connected to the positive terminal of the source and which is usually pierce
22、d to provide a free passage for the electron beam 3.3 emission current the electron current flowing from cathode NOTEThe electron beam current arriving at the workpiece may either be lower than the emission current, or up to several orders of magnitude larger than the emission current if ion bombard
23、ment is also present. 3.4 beam accelerating voltage (high voltage) the potential difference between the cathode and the anode to generate an electric field for acceleration of the electrons 3.5 electron gun chamber the vacuum chamber which contains the electron gun may be separated from the object t
24、o be heated by an aperture, so that between the electron gun (electron beam gun) and the compartment with the workpiece, a relatively high pressure difference can be established 3.6 interlock a device that prevents activation of a piece of equipment when some form of hazard or danger exists 3.7 mech
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