1、BRITISH STANDARDBS EN 60519-2:2006Safety in electroheat installations Part 2: Particular requirements for resistance heating equipmentThe European Standard EN 60519-2:2006 has the status of a British StandardICS 25.180.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g4
2、4g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 60519-2:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2006 BSI 2006ISBN 0 580 49057 2National fore
3、wordThis British Standard was published by BSI. It is the UK implementation of EN 60519-2:2006. It is identical with IEC 60519-2:2006. It supersedes BS EN 60519-2:1994 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PEL/27, Electroheating.A list of org
4、anizations represented on PEL/27 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 confer immunity from legal obligations. Am
5、endments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARD EN 60519-2 NORME EUROPENNE EUROPISCHE NORM September 2006 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central
6、Secretariat: rue de Stassart 35, B - 1050 Brussels 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60519-2:2006 E ICS 25.180.10 Supersedes EN 60519-2:1993English version Safety in electroheat installations Part 2: Particular
7、requirements for resistance heating equipment (IEC 60519-2:2006) Scurit dans les installations lectrothermiques Partie 2: Exigences particulires pour les installations de chauffage par rsistance (CEI 60519-2:2006) Sicherheit in Elektrowrmeanlagen Teil 2: Besondere Anforderungen an Einrichtungen mit
8、Widerstandserwrmung(IEC 60519-2:2006) This European Standard was approved by CENELEC on 2006-09-01. CENELEC 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.
9、 Up-to-date lists and bibliographical references concerning such national standards may be obtained on 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 translat
10、ion under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France
11、, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword The text of document 27/525/FDIS, future edition 3 of IEC 60519-2, prepared b
12、y IEC TC 27, Industrial electroheating equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60519-2 on 2006-09-01. This European Standard supersedes EN 60519-2:1993. Significant changes with respect to EN 60519-2:1993 are as follows: the structure has been adju
13、sted to the latest ISO/IEC Directives; the latest edition of EN 60519-1 has been taken into account; definitions have been brought into line with the second edition of IEC 60050-841. This standard shall be used in conjunction with EN 60519-1:2003. It is intended to modify, replace or make additions
14、to EN 60519-1 for particular requirements for resistance heating equipment. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2007-06-01 latest date by which the national standa
15、rds conflicting with the EN have to be withdrawn (dow) 2009-09-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60519-2:2006 was approved by CENELEC as a European Standard without any modification. _ EN 60519-2:2006 2 3 EN 60519-2:2006 CONTENTS 1
16、 Scope and object4 2 Normative references .5 3 Terms and definitions .6 4 Classification of electroheat equipment according to voltage bands .8 5 Classification of electroheat equipment according to frequency bands .8 6 General requirements .8 6.7 Resistivity8 6.8 Auxiliary equipment .8 6.9 Bare hea
17、ting conductors 9 6.10 Leakage current 9 6.11 Vapours, precipitates and sediments from the charge.9 6.12 Salt-bath furnaces and melting furnaces.9 6.13 Heating-up solidified contents of the bath.10 6.14 Vacuum furnaces.10 7 Isolation and switching .10 8 Connection to the supply network and internal
18、connections .10 9 Protection against electric shock.10 9.5 Protection against direct contact 10 9.6 Protection against direct and indirect contact .11 10 Protection against overcurrent 12 11 Equipotential bonding .12 12 Control circuits and control functions.12 13 Protection against thermal influenc
19、es12 13.6 Surface temperature of resistance heating equipment.12 13.7 Special measures 13 13.8 Temperature safety devices .13 13.9 Nitrite and nitrate bath furnaces .13 14 Risk of fire and danger of explosion 14 14.1 Nitrite and nitrate bath furnaces .14 15 Marking, labelling and technical documenta
20、tion.14 15.2 Labelling .15 15.3 Technical documentation .15 16 Information on inspection and commissioning and instructions for utilization and maintenance of electroheat installations15 16.2 Information on inspection and commissioning.15 16.3 Instructions for utilization to be given in the technica
21、l documentation16 Annex ZA (normative) Normative references to international publications with their corresponding European publications17 EN 60519-2:2006 4 SAFETY IN ELECTROHEAT INSTALLATIONS Part 2: Particular requirements for resistance heating equipment 1 Scope and object This part of IEC 60519
22、is applicable to the indirect resistance heating equipment and the direct resistance heating equipment specified in items a) and b) below respectively, operating in voltage bands 1 and 2. The object of this standard is the standardization of safety requirements for both indirect and direct resistanc
23、e heating equipment described below. a) Indirect resistance heating equipment These particular requirements apply to equipment for indirect resistance heating, such equipment being energized with d.c. voltage or with single-phase or multiphase a.c. voltage of frequency up to 60 Hz. Heat generation i
24、s effected by current flow in solid metallic heating conductors; solid non-metallic heating conductors; radiant tubes and immersion heaters. Examples of indirect resistance heating equipment in general use include discontinuous furnaces such as batch-type furnaces, muffle furnaces, pot-type furnaces
25、 (crucible furnaces), pit-type furnaces, bell-type furnaces, bogie-hearth furnaces, fluidized-bed furnaces, immersion heater metal baths; continuous furnaces with continuous or discontinuous charge conveyors, such as roller-hearth furnaces, pusher furnaces, walking-beam furnaces, rotary-retort furna
26、ces, rotary-hearth furnaces, tunnel furnaces (kilns), continuous muffle furnaces. Indirect resistance heating equipment in general use also includes equipment for heating solids, liquids or gases; equipment for melting and holding; individual heating-element assemblies (movable or fixed heaters). In
27、direct resistance heating equipment where particular hazards are likely to occur includes nitrite bath furnaces; indirect resistance heating equipment where an explosive atmosphere is likely to occur inside the furnace during heat treatment: furnaces for carburizing in gas atmospheres consisting of
28、the mixture of hydrogen and methane or propane and carbon monoxide; 5 EN 60519-2:2006 indirect resistance heating equipment with protective gas and/or reaction gas atmosphere: furnaces for gas carburizing, gas nitriding, carbo-nitriding (protective gas, for example, argon); equipment with infrared h
29、eating elements. These requirements do not apply to trace heating systems dealt with in IEC 60519-10. b) Direct resistance heating equipment These particular requirements also apply to equipment for direct resistance heating by means of current introduced by electrodes passing through the charge or
30、a fluid to be heated. Such equipment includes, for example, salt-bath electrode furnaces; glass-melting furnaces; furnaces for graphitizing; furnaces for production of silicon carbide. These requirements do not apply to equipment for direct resistance heating, where, owing to the technology used, IE
31、C 60519-3, IEC 60519-4, IEC 60519-8 and IEC 60519-21 are applicable. Moreover, they do not apply to electrode-steam-boiler instantaneous water heaters and electrode pressure vessels. 2 Normative references The following referenced documents are indispensable for the application of this document. For
32、 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 (IEC) Part 841: Industrial electroheat IEC 60335-1:2000, Household and similar el
33、ectrical appliances Safety Part 1: General requirements Amendment 1 (2004)1IEC 60364-4-41:2005, Low-voltage electrical installations Part 4-41: Protection for safety Protection against electric shock IEC 60364-4-42:2001, Electrical installations of buildings Part 4-42: Protection for safety Protecti
34、on against thermal effects IEC 60398:1999, Industrial electroheating installations General test methods IEC 60479-1:2005, Effects of current on human beings and livestock Part 1: General aspects IEC 60519-1:2003, Safety in electroheat installations Part 1: General requirements _ 1There exists a cons
35、olidated edition 4.1 (2004) that includes edition 4 and its amendment 1. EN 60519-2:2006 6 IEC 60519-3:2005, Safety in electroheat installations Part 3: Particular requirements for induction and conduction heating and induction melting installations IEC 60519-4:2000, Safety in electroheat installati
36、ons Part 4: Particular requirements for arc furnace installations IEC 60519-8:2005, Safety in electroheat installations Part 8: Particular requirements for electroslag remelting furnaces IEC 60519-10:2005, Safety in electroheat installations Part 10: Particular requirements for electrical resistance
37、 trace heating systems for industrial and commercial applications IEC 60519-21:1998, Safety in electroheat installations Part 21: Particular requirements for resistance heating equipment Heating and melting glass equipment IEC 60529:2001, Degrees of protection provided by enclosures (IP Code) IEC 60
38、990:1999, Methods of measurement of touch current and protective conductor current IEC 61140:2001, Protection against electric shock Common aspects for installation and equipment 3 Terms and definitions For the purposes of this document, the following terms and definitions, as well as those given in
39、 IEC 60519-1 and IEC 60050-841, apply. 3.1 electrode (for direct resistance heating) part of direct resistance heating which, being in contact with the charge, transfers the current to it 3.2 heating conductor conductor used for conversion of electric energy into heat NOTE The term “heating conducto
40、r“ is often used interchangeably with “heating resistor“ IEV 841-23-13. 3.3 glass-melting furnace (direct resistance heating) furnace in which the melting of glass is effected by the heat generated by the direct flow of current in the bath, in which the electrodes are immersed 3.4 salt-bath furnace
41、furnace in which a salt bath is principally used as a heat-transfer fluid NOTE Heating may be effected by direct or indirect heating. Direct heating is effected when the heating-element assemblies (heaters) are located in the salt bath (immersed heaters, electrodes). Indirect heating is effected whe
42、n the heating-element assemblies (heaters) are located outside the tank or crucible. 7 EN 60519-2:2006 3.5 nitrite and nitrate bath furnace salt-bath furnace containing, in metallic tanks or crucibles, potassium or sodium nitrate or nitrite baths or baths composed of a mixture of these salts 3.6 pre
43、-heating equipment (for bath furnaces) auxiliary heating devices which ensure that the upper layer of the bath is melted first when the bath has reached a state of solidification 3.7 melting furnace furnace used for melting solid charges 3.8 holding-temperature furnace furnace used for maintaining i
44、n a molten state, at predetermined temperature, charges introduced in the furnace in a melted state 3.9 heat transfer fluid liquid or gas used for transferring heat from the heating-element assembly (heater) to the charge 3.10 removable heating element, removable heating-element assembly (heater) he
45、ating element and/or heating-element assembly (heater), which can be removed or replaced by the user without dismantling any other parts, for example, thermal insulation, refractories of the furnace NOTE Heating elements and/or heating-element assemblies (heaters) are “removable in service“ when the
46、y can be removed in service without interrupting the operating process. 3.11 thermal cut-out and temperature protector devices which switch off the heating equipment when pre-determined temperatures are exceeded NOTE Thermal cut-outs are resettable; temperature protectors are not resettable and are
47、replaced each time they have operated. 3.12 pre-selected temperature limiter device which switches off the heating equipment when the pre-selected temperature of the equipment (working temperature) is exceeded by a predetermined value and which retains the equipment in the de-energized state NOTE Pr
48、e-selected temperature limiters are set, locked or reset only by a skilled person. 3.13 pre-selected temperature controller device which controls the furnace temperature so that it does not exceed or fall below the pre-selected temperature by a predetermined value NOTE Pre-selected temperature contr
49、ollers are set or locked only by a skilled person. EN 60519-2:2006 8 3.14 leakage current (in an installation) electric current which flows to earth or to extraneous conductive parts under normal operating conditions IEV 195-05-15, modified NOTE 1 This current may have capacitive components including that resulting from the deliberate use of capacitors. NOTE 2 The value of the leakage current may differ in the hot and the cold state of t
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