EN 60519-11-2007 en Safety in electroheat installations - Part 11 Particular requirements for installations using the effect of electromagnetic forces on liquid metals《电热设备的安全 第11部.pdf

1、BRITISH STANDARDBS EN 60519-11:2007Safety in electroheat installations Part 11: Particular requirements for installations using the effect of electromagnetic forces on liquid metalsThe European Standard EN 60519-11:2007 has the status of a British StandardICS 25.180.10g49g50g3g38g50g51g60g44g49g42g3

2、g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 60519-11:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 Oct

3、ober 2007 BSI 2007ISBN 978 0 580 56431 4National forewordThis British Standard is the UK implementation of EN 60519-11:2007. It is identical to IEC 60519-11:2007. It supersedes BS EN 60519-11:1997 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PEL/27,

4、 Electroheating.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confe

5、r immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARD EN 60519-11 NORME EUROPENNE EUROPISCHE NORM September 2007 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee

6、fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60519-11:2007 E ICS 25.180.10 Supersedes EN 60519-11:1997English version Safety in electr

7、oheat installations - Part 11: Particular requirements for installations using the effect of electromagnetic forces on liquid metals (IEC 60519-11:2007) Scurit dans les installations lectrothermiques - Partie 11: Exigences particulires pour les installations utilisant leffet des forces lectromagntiq

8、ues sur les mtaux liquides (CEI 60519-11:2007) Sicherheit in Elektrowrmeanlagen - Teil 11: Besondere Anforderungen an Anlagen, die die Wirkung elektromagnetischer Krfte auf flssige Metalle nutzen (IEC 60519-11:2007) This European Standard was approved by CENELEC on 2007-09-01. CENELEC members are bo

9、und 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 application to the

10、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 Secretariat has the sam

11、e 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, the Netherlands, Norw

12、ay, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword The text of document 27/577/FDIS, future edition 2 of IEC 60519-11, prepared by IEC TC 27, Industrial electroheating equipment, was submitted to the IEC-CENELEC parallel vote and was approv

13、ed by CENELEC as EN 60519-11 on 2007-09-01. This European Standard supersedes EN 60519-11:1997. The significant changes with respect to EN 60519-11:1997 are as follows: EN 60519-1:2003 and EN 60519-3:2005 have been taken into account; definitions have been brought into line with IEC 60050-841:2004.

14、This standard is to be used in conjunction with EN 60519-1:2003. It is intended to specify particular requirements for installations using the effect of electromagnetic forces on liquid metals. The following dates were fixed: latest date by which the EN has to be implemented at national level by pub

15、lication of an identical national standard or by endorsement (dop) 2008-06-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2010-09-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60519-11:2007 wa

16、s approved by CENELEC as a European Standard without any modification. _ EN 60159-11:2007 2 CONTENTS 1 Scope.4 2 Normative references4 3 Terms and definitions .5 4 Inductor 6 5 Capacitors 6 6 Mains-frequency power sources7 7 Solid-state frequency converters .7 8 Switchgear8 9 Cables, wires and busba

17、rs 8 10 Liquid cooling .9 11 Rating plate 9 12 Clearance and creepage distances .10 13 Protection against electric shock.10 13.1 Protection against direct contact 10 13.1.1 Permissible touch voltage as a function of frequency10 13.1.2 Accessibility of electrical equipment .10 13.1.3 Accessible plugs

18、 and sockets.10 13.1.4 Special requirements for live conductors at voltage bands 2 and 3 .10 13.2 Protection against indirect contact .11 13.2.1 Permissible touch voltage as a function of duration and frequency11 13.2.2 Electrical insulation resistance .11 13.3 Special requirements .11 13.4 Earthing

19、 provisions 12 13.5 Protective conductors 12 14 Radio interferences.13 15 Operation instructions.13 Annex A (normative) Specific requirements for electromagnetic pouring equipment 14 Annex B (normative) Specific requirements for electromagnetic equipment with lining.15 EN 60519-11:2007 3 Annex ZA (n

20、ormative) Normative references to international publications with their corresponding European publications.16 SAFETY IN ELECTROHEAT INSTALLATIONS Part 11: Particular requirements for installations using the effect of electromagnetic forces on liquid metals 1 Scope This part of IEC 60519 applies to

21、installations predominantly using the effect of electromagnetic forces on liquid metals: installations for electromagnetic (induction) stirring or transport of liquid metals at low frequencies; installations that influence the pouring process by an electromagnetic field; parts directly affected by t

22、he electromagnetic stirring, transport or pouring installation. Examples of application: stirring devices for casting machines, arc furnaces, ladles, etc.; transport of liquid metal for emptying or filling furnaces, launders or moulds; devices to transport liquid metal with simultaneous proportionin

23、g of the transported quantity, for example, for filling diecasting machines; influencing the ingot surface or the pouring stream enhancing crystallization by means of an electromagnetic field during continuous casting; sealing of mechanical gaps of melt vessels, for example, in vertical galvanizing

24、line. This standard consists of requirements common to installations using the effect of electromagnetic forces on liquid metals; specific requirements for electromagnetic pouring equipment (Annex A); specific requirements for electromagnetic equipment with lining (Annex B). NOTE When applying IEC 6

25、0519-1 in conjunction with this standard, the terms “electroheat installation“ or “electroheat device“ should be replaced by the term “installation using the effect of electromagnetic forces on liquid metals“. 2 Normative references The following referenced documents are indispensable for the applic

26、ation 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. IEC 60050-841:2004, International Electrotechnical Vocabulary Part 841: Industrial electroheat IEC 60110-1:1998, Pow

27、er capacitors for induction heating installations Part 1: General EN 60159-11:2007 4 IEC 60143-1:2004, Series capacitors for power systems Part 1: General IEC 60364-4-41:2005, Low-voltage electrical installations Part 4-41: Protection for safety Protection against electric shock IEC 60519-1:2003, Sa

28、fety in electroheat installations Part 1: General requirements CISPR 11, Industrial, scientific and medical (ISM) radio-frequency equipment Electromagnetic disturbance characteristics Limits and methods of measurement 3 Terms and definitions For the purpose of this document, the terms and definition

29、s given in IEC 60519-1 and IEC 60050-841 (some of which are repeated here), as well as the following apply. 3.1 installation using the effect of electromagnetic forces on liquid metals installation composed of the inductor and the electric and mechanical equipment used to exercise an intended effect

30、 of electromagnetic forces on liquid metals 3.2 electromagnetic stirring of liquid metals procedure to achieve stirring motion in liquid metals by using an electromagnetic field IEV 841-27-24, modified 3.3 electromagnetic transport of liquid metals procedure to move liquid metals in a defined direct

31、ion using an electromagnetic field IEV 841-27-25, modified 3.4 electromagnetic casting of liquid metals procedure to shape the liquid metal stream or to influence its surface quality after pouring by the use of an electromagnetic field IEV 841-27-26 3.5 enhancing crystallization of liquid metal in e

32、lectromagnetic fields procedure to shape a form and structure of metal crystals in an electromagnetic field IEV 841-27-27 3.6 inductor part of an installation (for example, coil(s) using the effect of electromagnetic forces on liquid metals which produces the electromagnetic field to yield the requi

33、red electrodynamic force NOTE Inductor is defined in IEV 841-27-47, but for the purpose of this standard this more specific definition is needed. EN 60519-11:2007 5 4 Inductor 4.1 Inductors with high power ratings may be equipped with yokes (coil flux guides) to guide the magnetic flux outside the i

34、nduction coil(s) to reduce stray fields possibly heating the surrounding metal structure. The design of these yokes should take care of the risk of them being excessively heated by eddy currents. 4.2 Where the inductor or parts of it are intended to be replaced due to wear or exchanged to meet a new

35、 production requirement, the manufacturers instructions shall be followed. 4.3 Should the effect of cooling of the inductor become insufficient and cause danger to personnel or damage to essential parts of the equipment, an alarm signal shall be given and the power switched off automatically. In the

36、 case where a sudden interruption of power could cause a possible hazard to personnel, due to liquid metal splashes, a controllable reduction of power is recommended. 4.4 For installations using the effect of electromagnetic forces on liquid metals with forced cooled inductors having a charge and/or

37、 lining of high heat capacity, it is advisable to have an emergency supply for cooling the coil(s) and, where applicable, the conveying equipment until the hot charge has been removed and until the lining has cooled to a safe temperature. 4.5 The design of the inductor shall take into account the co

38、ncentrated electromagnetic forces due to the high values of low-frequency current in the coil(s) that can produce vibrations and local field concentrations. 4.6 The inductor shall be designed and manufactured so as to meet the difficult operational and environmental requirements, for example, the pr

39、esence of water spray, steam and heat radiation. 4.7 Design of components in the vicinity of the inductor shall take into account the influence of electromagnetic fields. Apart from suitable material and shape, further measures can be required such as screening, insulation, forced cooling and avoida

40、nce of closed metallic loops in order to keep the electromagnetic and thermal influences within admissible limits. 5 Capacitors 5.1 This clause deals with power capacitors. Other capacitors, for example, installed in control circuits, are covered by 6.2.4 of IEC 60519-1. 5.2 All necessary precaution

41、s shall be taken to rapidly discharge capacitors which could be dangerous to touch after they have been switched off. A warning notice shall be displayed in a visible position stating that the discharge shall be effected before touching the capacitors. 5.3 For capacitors permanently connected in par

42、allel to an inductor or a transformer, the discharge device may be dispensed with. EN 60159-11:2007 6 Where capacitors connected in parallel to an inductor or a transformer are disconnected only in the off-load condition, the discharge device may be dispensed with, providing a sufficient time delay

43、occurs for the discharge between switching off the supply and opening the capacitor switch. If there is a risk of d.c. charging, the discharge device is indispensable. 5.4 Capacitors that are switched on load or connected via external fuses shall have discharge facilities. 5.5 Information on the req

44、uirements for the discharge of series connected capacitors is given in 6.8, 6.9 and 6.10 of IEC 60110-1 and in 5.1 of IEC 60143-1. 5.6 The terminals of capacitors with internally series-connected elements shall be short-circuited before being disconnected. NOTE Although a discharge device has operat

45、ed, a residual charge may sometimes remain at the interconnections of series-connected capacitors due to blown fuses, interrupted internal connections, differences of the capacitance values or dielectric recharging from d.c. components of the previous charge. 5.7 Capacitors in installations without

46、electronic power control shall be connected via protective devices. Where internal fuses are employed, external means of protection can be dispensed with. 5.8 Where capacitors are liquid-cooled, the provision given in 6.2.8 of IEC 60519-1 shall apply. 6 Mains-frequency power sources In the case of m

47、ains-frequency power sources which feed a single-phase load from a three-phase supply and which employ capacitors and reactors to keep the three line currents in reasonable balance, series resonance causing overvoltages liable to impair safety may occur if the phase connection common to the capacito

48、rs and reactors of the balancing circuit becomes open-circuited, for example, by a blown fuse or a defective contactor in the line. For such conditions measures shall be provided to disconnect the supply, for example, overvoltage tripping of the supply circuit-breaker. Contactors which control the t

49、hree-phase supply to the reactor-capacitor combination shall be designed to ensure that the contact connected to the common point of the reactor and capacitor closes earlier when switching on and opens later when switching off. Design shall take care of the risk of possible harmonic currents absorbed from the supply system due to parallel resonance. 7 Solid-state frequency converters 7.1 Solid-state frequency converters shall be protected at the input terminals to prevent transient overvol