1、Safety in electroheatinstallations Part 21: Particular requirements forresistance heating equipment Heating and melting glass equipmentBS EN 60519-21:2009raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsNational forewordThis Britis
2、h Standard is the UK implementation of EN 60519-21:2009. It isidentical to IEC 60519-21:2008. It supersedes BS EN 60519-21:1998 which iswithdrawn.The UK participation in its preparation was entrusted to Technical CommitteePEL/27, Electroheating.A list of organizations represented on this committee c
3、an 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 57527 3ICS 25.180.10BRITISH STANDARDBS EN 60519-21:2009Compliance with a British Standard cannot
4、 confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on Amendments issued since publicationAmd. No. Date Text affectedEUROPEAN STANDARD EN 60519-21 NORME EUROPENNE EUROPISCHE NORM January 2009 CENELEC European Co
5、mmittee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: avenue Marnix 17, B - 1000 Brussels 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC
6、 members. Ref. No. EN 60519-21:2009 E ICS 25.180.10 Supersedes EN 60519-21:1998English version Safety in electroheat installations - Part 21: Particular requirements for resistance heating equipment - Heating and melting glass equipment (IEC 60519-21:2008) Scurit dans les installations lectrothermiq
7、ues - Partie 21: Exigences particulires pour les installations de chauffage par rsistance - Installations lectrothermiques de fusion de verre (CEI 60519-21:2008) Sicherheit in Elektrowrmeanlagen - Teil 21: Besondere Anforderungen an Einrichtungen mit Widerstandserwrmung - Einrichtungen zum Erwrmen u
8、nd Schmelzen von Glas (IEC 60519-21:2008) This European Standard was approved by CENELEC on 2008-12-01. 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 alterat
9、ion. 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 tran
10、slation 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, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, F
11、inland, France, 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. BS EN 60519-21:2009EN 60519-21:2009 2 Foreword The text of document 27/6
12、30/CDV, future edition 2 of IEC 60519-21, prepared by IEC TC 27, Industrial electroheating equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60519-21 on 2008-12-01. This European Standard supersedes EN 60519-21:1998. The significant changes with respect to E
13、N 60519-21:1998 are as follows: EN 60519-1:2003 and EN 60519-2:2006 have been taken into account; definitions have been brought into line with IEC 60050-841:2004. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical nation
14、al standard or by endorsement (dop) 2009-09-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2011-12-01 This standard is to be used in conjunction with EN 60519-2:2006. It is intended to specify particular requirements for resistance heating and melti
15、ng glass equipment. This Part 21 supplements or modifies the corresponding clauses of EN 60519-2, so as to convert it into a European Standard. Where a particular subclause of Part 2 is not mentioned in this Part 21, that subclause applies as far as is reasonable. Where this standard states “additio
16、n“, “modification“ or “replacement“, the relevant text of Part 2 is to be adapted accordingly. NOTE Subclauses and notes which are additional to those in Part 2 are numbered starting from 101. _ Endorsement notice The text of the International Standard IEC 60519-21:2008 was approved by CENELEC as a
17、European Standard without any modification. _ BS EN 60519-21:2009 2 60519-21 IEC:2008 CONTENTS 1 Scope and object5 2 Normative references .5 3 Terms and definitions .5 4 Classification of electroheat equipment according to voltage bands6 5 Classification of electroheat equipment according to frequen
18、cy bands6 6 General requirements.6 7 Isolation and switching .6 8 Connection to the supply network and internal connections 6 9 Protection against electric shock 6 10 Protection against overcurrent7 11 Equipotential bonding.7 12 Control circuits and control functions7 13 Protection against thermal i
19、nfluences .7 14 Risk of fire and danger of explosion7 15 Marking, labelling and technical documentation7 16 Information on inspection and commissioning and instructions for utilization and maintenance of electroheat installations .7 BS EN 60519-21:200960519-21 IEC:2008 5 SAFETY IN ELECTROHEAT INSTAL
20、LATIONS Part 21: Particular requirements for resistance heating equipment Heating and melting glass equipment 1 Scope and object Replacement: This part of IEC 60519 is applicable to indirect resistance heating equipment for the heating and melting of glass, operating in voltage bands 1 and 2. These
21、particular requirements also apply to equipment for direct resistance heating and melting of glass by means of current introduced by electrodes passing through the charge to be heated. The object of this standard is the determination of safety requirements for both indirect and direct resistance hea
22、ting equipment for the heating and melting of glass. NOTE Extraction of liquid glass or a similar material at the extraction point is part of the production process and does not constitute part of the operation of the electroheat equipment. This standard covers the safety aspects of electrical parts
23、 also in the case when electrical heating is combined with other means of heating, for example liquid fuel heating. These requirements do not apply to equipment for direct resistance heating, where, owing to the technology used, IEC 60519-3, IEC 60519-4 and IEC 60519-8 are applicable. 2 Normative re
24、ferences This Clause of part 2 is applicable. 3 Terms and definitions This Clause of part 2 applies except as follows: Addition: 3.101 glass-melting furnace (indirect resistance heating) furnace in which glass is melted by means of indirect resistance heating 3.102 pot furnace melting equipment in w
25、hich the batch is melted by means of indirect electrical heating in vessels called “pots” made of a fire-proof material and placed in the furnace 3.103 filling machine machine which feeds the batch into the glass furnaces BS EN 60519-21:2009 6 60519-21 IEC:2008 3.104 extraction machine machine which
26、 extracts molten glass from the glass furnaces 3.105 extraction point opening in the glass furnace through which molten glass is drawn off NOTE Molten glass is drawn off for example, manually by means of glassmakers tools or by means of extraction machines. In the case of pot furnaces, the extractio
27、n points also serve as openings for the feeding or extraction of samples. 3.106 earthing electrode electrode that is installed in the glass melt and is connected to the equipotential system 4 Classification of electroheat equipment according to voltage bands This Clause of part 2 is applicable. 5 Cl
28、assification of electroheat equipment according to frequency bands This Clause of part 2 is applicable. 6 General requirements This Clause of part 2 is applicable. 7 Isolation and switching This Clause of part 2 is applicable. 8 Connection to the supply network and internal connections This Clause o
29、f part 2 is applicable. 9 Protection against electric shock This Clause of part 2 applies except as follows: Addition: 9.2.101 Measures shall be taken in the case of directly or indirectly heated melting equipment, which provides protection against electric shock when glassmakers tools or extraction
30、 machines are submerged in the conductive glass melt, or when the batch mixture is being fed into the glass melt. Measures of this type are for example: installation of an earthing electrode for personnel safety at the extraction point. The electrode function shall be constantly monitored. When the
31、monitoring device shows a reaction, the glass furnace shall automatically be shut down, possibly in partial areas, or by means of appropriate measures, further extraction shall be prevented; BS EN 60519-21:200960519-21 IEC:2008 7 NOTE The earthing electrode should be constructed and set in such a ma
32、nner that, even under the most unfavourable circumstances, for example a change in the conduction and filling level of the melt in the region of the extraction point, effectiveness is not impaired. measures against contact with live parts (electrodes, heating elements) by appropriate construction-de
33、sign when using glassmakers tools, e.g. covers or barriers; insulation of the working platform at the place of operation; In addition, in the case of indirectly heated glass furnaces (pot furnaces): automatic shut-off of heating when leakage current measurement indicates a dangerous situation. 9.2.1
34、02 Filling machines, extraction machines and the whole of the steel construction of the melting plant shall be connected to an equipotential system. Earthing electrodes for safety of personnel shall be installed in the glass melt and be connected to the equipotential system. If an underground equipo
35、tential system is installed, the requirements of IEC 60364-4-41 shall be fulfilled. 10 Protection against overcurrent This Clause of part 2 is applicable. 11 Equipotential bonding This Clause of part 2 is applicable. 12 Control circuits and control functions This Clause of part 2 is applicable. 13 P
36、rotection against thermal influences This Clause of part 2 is applicable. 14 Risk of fire and danger of explosion This Clause of part 2 is applicable. 15 Marking, labelling and technical documentation This Clause of part 2 is applicable. 16 Information on inspection and commissioning and instruction
37、s for utilization and maintenance of electroheat installations This Clause of part 2 applies except as follows: Replacement: BS EN 60519-21:2009 8 60519-21 IEC:2008 16.3.4 For directly or indirectly heated melting equipment, when glassmakers tools or extraction machines are submerged in the conducti
38、ve glass melt, or when the batch mixture is being fed into the glass melt, the following shall be applied (in compliance with local safety at work regulations): use of protective equipment (e.g. clothes, shoes, gloves), use of insulated tools. These measures are to be provided in addition to the mea
39、sures described in 9.2.101, to provide protection against electric shock. Addition: 16.3.101 Compliance with the requirements for the avoidance of contact with live parts of the equipment (which are above earth potential), including the necessary shut-down systems, shall be checked at the time of se
40、tting up the equipment and periodically thereafter. Addition: 16.4.101 During maintenance work, for replacing electrodes the following shall be applied (in compliance with local safety at work regulations): use of protective equipment (e.g. clothes, shoes, gloves), use of insulated tools, use of pro
41、tective extra low voltage (PELV). _ BS EN 60519-21:2009This page deliberately left blankThis page deliberately left blankBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated
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