EN 60519-7-2008 en Safety in electroheat installations - Part 7 Particular requirements for installations with electron guns《电热设备的安全 第7部分 对有电子枪设备的特殊要求》.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsWB9423_BSI_StandardColCov_noK_AW:BSI FRONT COVERS 5/9/08 12:55 Page 1Safety in electroheat installationsPart 7 Particular requi ements for installations with electron gunsBS EN 60519

2、-7:2008rNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LANational forewordThis British Standard is the UK implementation of EN 60519-7:2008. It isidentical to IEC 60519-7:2008.The UK participation in its preparation was entrusted to Technical CommitteePEL/27, Electroheating.A lis

3、t of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2009ISBN 978 0 580 56430 7ICS 25.180.10Compliance with a British

4、Standard cannot confer immunity fromlegal obligations.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60519-7:200This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 January 2009. 8EUROPEAN STANDARD EN 60519-7

5、 NORME EUROPENNE EUROPISCHE NORM December 2008 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 2008 CENELEC - All rights of expl

6、oitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60519-7:2008 E ICS 25.180.10 English version Safety in electroheat installations - Part 7: Particular requirements for installations with electron guns (IEC 60519-7:2008) Scurit dans les installations lectrothe

7、rmiques - Partie 7: Exigences particulires pour les installations comportant des canons lectrons (CEI 60519-7:2008) Sicherheit in Elektrowrmeanlagen - Teil 7: Besondere Anforderungen an Anlagen mit Elektronenkanonen (IEC 60519-7:2008) This European Standard was approved by CENELEC on 2008-10-21. CEN

8、ELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on

9、application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secr

10、etariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, th

11、e Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 60519-7:2008EN 60519-7:2008 - 2 - Foreword The text of document 27/578/CDV, future edition 2 of IEC 60519-7, prepared by IEC TC 27, Industrial electroheating equipment, was

12、submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60519-7 on 2008-10-21. This standard is to be used in conjunction with EN 60519-1:2003. It is intended to specify particular requirements for electroheating installations with electron guns. The following dates were fixed:

13、latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2009-08-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2011-11-01 Annex ZA has been added by CENELEC. _ Endo

14、rsement notice The text of the International Standard IEC 60519-7:2008 was approved by CENELEC as a European Standard without any modification. _ BS EN 60519-7:2008- 3 - EN 60519-7:2008 Annex ZA (normative) Normative references to international publications with their corresponding European publicat

15、ions The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has b

16、een modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60050-841 2004 International electrotechnical vocabulary - Part 841: Industrial electroheat - - IEC 60204-1 (mod) 2005 Safety of machinery - Electrical equipment of machines -

17、Part 1: General requirements EN 60204-1 2006 IEC 60364-4-43 -1)Low voltage electrical installations - Part 4-43: Protection for safety - Protection against overcurrent - - IEC 60519-1 2003 Safety in electroheat installations - Part 1: General requirements EN 60519-1 2003 1)Undated reference. BS EN 6

18、0519-7:2008 2 60519-7 IEC:2008 CONTENTS 1 Scope.5 2 Normative references .5 3 Terms and definitions .5 4 Components of electron beam installations.7 5 Types of electron guns .7 6 Main risks.7 7 Earthing of high-voltage parts in gun chamber during maintenance 8 7.1 Manual earthing device .8 7.2 Mecha

19、nical earthing system 8 7.3 Automatic earthing system 8 8 High-voltage feeding 8 8.1 High-voltage feeder cables8 8.2 Return conductor.9 8.3 Minimum distance between bare high-voltage components9 9 Protection against electric shock 9 10 Protection against overcurrent and overvoltage 10 10.1 General r

20、equirements10 10.2 High-voltage power supply 10 11 Equipotential bonding.10 12 Control circuits and control functions10 12.1 Control circuits 10 12.2 Control functions .10 13 Liquid cooling .10 14 Risks caused by certain processes or components .11 14.1 Risk of fire.11 14.2 Danger of explosion 11 14

21、.3 Environmental pollution .11 14.4 Health hazards 11 14.5 Vacuum plant 11 15 X-rays 12 16 Marking, labelling, technical documentation and instructions 12 16.1 Marking, labelling and technical documentation.12 16.2 Information on inspection and commissioning, and instructions for utilization and mai

22、ntenance of installations with electron guns 12 BS EN 60519-7:200860519-7 IEC:2008 5 SAFETY IN ELECTROHEAT INSTALLATIONS Part 7: Particular requirements for installations with electron guns 1 Scope This part of IEC 60519 deals with safety of electroheat installations with electron guns. It applies t

23、o all the electroheat applications with electron guns. This standard, whilst prepared for electroheat installations with electron guns may, however, also be used for non-thermal applications with electron guns and equipment employing glow discharge systems, where applicable. This standard applies al

24、so to high-voltage sources feeding electron guns. All requirements of IEC 60519-1 apply. Additional requirements for installations covered by this part of the standard are given in Clauses 6 to 16. 2 Normative references The following referenced documents are indispensable for the application of thi

25、s document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050-841:2004, International Electrotechnical Vocabulary Part 841: Industrial electroheat IEC 60204-1:2005, Safety of machi

26、nery Electrical equipment of machines Part 1: General requirements IEC 60364-4-43, Electrical installations of buildings Part 4-43: Protection for safety Protection against overcurrent IEC 60519-1:2003, Safety in electroheat installations Part 1: General requirements 3 Terms and definitions For the

27、purposes of this document, the terms and definitions given in IEC 60050-841, IEC 60519-1 and the following apply. 3.1 electron beam electron flux emitted from one source (cathode or plasma) and moving along the exactly determined tracks at very great velocities IEV 841-30-01, modified 3.2 electron (

28、beam) gun system of generating, forming and accelerating one or more electron beams BS EN 60519-7:2008 6 60519-7 IEC:2008 IEV 841-30-08, modified 3.3 anode (of an electron gun) electrode capable of educing and accelerating electrons from the medium of lower conductivity IEV 841-22-31, modified 3.4 c

29、athode (of an electron gun) electrode capable of emitting electrons from the medium of low conductivity and also of receiving positive carriers, if necessary IEV 841-22-32, modified 3.5 beam accelerating voltage potential difference between the cathode and the anode, to generate an electric field fo

30、r acceleration of electrons IEV 841-30-29 3.6 high-voltage power supply source of the acceleration voltage and of the emission current for electron guns 3.7 return conductor electrical interconnection between the high-voltage power supply (positive pole) and anodic part of the electron gun system in

31、cluding the vacuum chamber around the workpiece 3.8 interlock device that prevents activation of a piece of equipment when any form of hazard or danger exists 3.9 vacuum chamber enclosed space of a vacuum plant constructed in such a way that it can withstand a rarefied atmosphere inside, in which th

32、e workpiece to be treated is placed 3.10 electron gun chamber vacuum chamber in which the electron gun is located NOTE This chamber may be separated from the workpiece by an aperture, so that between the electron gun and the workpiece, a pressure difference can be established. 3.11 electron beam def

33、lection system electromagnetic coil or deflecting electrodes system, applied to place the beam to different working positions or move the beam over the charge heat surface IEV 841-30-25, modified 3.12 electron beam bending system electromagnetic coil or permanent magnet for changing the direction of

34、 the electron beam outside the electron gun BS EN 60519-7:200860519-7 IEC:2008 7 3.13 electron beam focussing system electromagnetic coil, system of coils or capacitor plates for focusing the electron beam over the charge heating surface IEV 841-30-27, modified 4 Components of electron beam installa

35、tions An electron beam installation primarily consists of: a) an electron gun; b) a high-voltage power supply; c) an electron beam deflection and focussing system including the necessary current supply and control systems; d) an electron beam bending system; e) a process chamber and workpiece handli

36、ng; f) a vacuum plant; g) a control system; h) facilities (electrical supply, cooling liquid, pneumatics, hydraulics, etc.). NOTE Some components are only in specific installations, for example there is no bending system in many installations. 5 Types of electron guns The principle of electron beam

37、exploited in electron guns is mainly used in optical applications (for example CRT, video projection, image scanning, electron microscopy), other non-thermal applications (for example polymer modification, curing, sterilization, disinfection) and electroheat applications. Typical electroheat applica

38、tions are for example melting, heating, evaporation and surface treatment. Depending on the application, electron beam guns can be classified according to the level of the acceleration voltage, the rated power, the electron beam geometry and the system for beam deflection and bending. 6 Main risks E

39、lectron guns used for electroheat applications, due to their properties, may basically generate the following risks: high-voltage electric shock (see Clauses 7, 8, 9 and 11); X-rays (see Clause 15); thermal destruction of components inside a vacuum chamber caused by high energy density (see Clause 1

40、4). BS EN 60519-7:2008 8 60519-7 IEC:2008 In addition, there may exist hazards caused by components of the electron beam installation like a vacuum plant (see Clause 12) and by the process realized by electron beam guns (see Clause 14). 7 Earthing of high-voltage parts in gun chamber during maintena

41、nce 7.1 Manual earthing device After switching off the high-voltage supply and gaining access by opening the door of the electron gun chamber or the housing of the electron gun, a portable earthing device of an approved design shall be used to remove any remaining charge before touching parts, which

42、 are normally live during operation. The highly flexible earth conductor of the portable earthing device shall be permanently fixed to its earthing point. This earth connection point shall be visible for easy checking by the operator and be clearly and durably marked. 7.2 Mechanical earthing system

43、Alternatively, a mechanically self-acting earthing mechanism that is activated by the mechanical action of opening the gun chamber may be installed, provided that the proper function of this self-acting mechanism can be easily checked by eyesight from a safe distance. 7.3 Automatic earthing system A

44、lternatively, an automatically operating earthing mechanism may be installed under the following conditions: a) the mechanism is automatically activated when the gun operation is stopped; b) the proper functioning of the automatic mechanism is detected by a fail-proof automatic detection system; c)

45、a signal visible to personnel opening the gun chamber indicates proper functioning of the automatic earthing system; d) an electro-mechanic lock of approved design disables opening of the gun chamber before the proper functioning of the earthing device has been positively detected. Also, in the imme

46、diate vicinity of the high-voltage supply(ies), portable earthing devices shall be installed so as to be clearly visible. 8 High-voltage feeding 8.1 High-voltage feeder cables The high-voltage feeder cables shall be adequately insulated and efficiently protected against mechanical damage. Shielded c

47、ables shall be used for the high-voltage feeders or the feeder cables shall be installed inside conductive conduits or flexible hoses. Cable shields, conduits or flexible hoses shall be connected to the equipotential bonding. When high-voltage feeder cables are laid inside conduits or flexible hoses

48、, other cables shall not be included, except a return conductor. Each electron gun shall have its own conduit or flexible hose. If the high-voltage feeder cable runs inside a conduit or flexible hose, the conduit or flexible hose shall extend into the high-voltage terminal connection compartment. BS

49、 EN 60519-7:200860519-7 IEC:2008 9 High-voltage feeder cables and low-voltage cables may run together inside cable trenches or cable troughs providing the high-voltage feeder cables are protected mechanically and electrically. The cable trenches or troughs are not considered as protection. 8.2 Return conductor Each electron gun shall have its own return conductor to carry the beam current back to the high-voltage power supply in a specified way. The cro