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1、BRITISH STANDARD BS EN 60335-2-73: 1997 Incorporating Corrigendum No. 1 Safety of household and similar electrical appliances Part 2: Particular requirements Section 2.73. Fixed immersion heaters The European Standard EN 60335-2-73:1996 has the status of a British Standard ICS 91.140.65; 97.100 Lice
2、nsed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:21:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60335-2-73:1997 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into e
3、ffect on 15 April 1997 BSI 02-2001 The following BSI references relate to the work on this standard: Committee reference CPL/61/32 Draft for comment 91/32077 DC ISBN 0 580 27331 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Subcommittee
4、CPL/61/32, Water heaters, upon which the following bodies were represented: Association of Control Manufacturers (TACMA BEAMA Ltd.) Association of Manufacturers of Domestic Electrical Appliances British Cable Makers Confederation British Electrotechnical Approvals Board Consumer Policy Committee of
5、BSI Department of the Environment (Building Research Establishment) Department of Trade and Industry (Consumer Safety Unit, C A Division) ERA Technology Ltd. Electricity Association Amendments issued since publication Amd. No.DateComments 10863 Corrigendum February 2001 See national foreword License
6、d Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:21:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60335-2-73:1997 BSI 02-2001i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 60335-2-733 National annex NA (informative) Original IEC text amended
7、 by CENELEC common modificationsInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:21:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60335-2-73:1997 ii BSI 02-2001 National foreword This British Standard has been prepared by Subcommittee CPL/61/32 and is the English lan
8、guage version of EN 60335-2-73:1996 Safety of household and similar electrical appliances Part 2: Particular requirements for fixed immersion heaters, including Corrigendum December 1999 published by the European Committee for Electrotechnical Standardization (CENELEC). It was derived from IEC 335-2
9、-73:1994 (first edition) published by the International Electrotechnical Commission (IEC) which has the same title as the European Standard. The CENELEC common modifications have been implemented at the appropriate places in the text. The start and finish of each common modification is indicated in
10、the text by tags ?. The national differences taken from the preface to IEC 335-2-73:1994 and parts of the original IEC text that have been modified by CENELEC are quoted in national annex NA. Corrigendum December 1999 introduces a CENELEC common modification to 19.4. The foreword of EN 60335-2-73 ma
11、kes reference to the date of withdrawal, dow, of the relevant national standard. In this case the relevant national standard is BS 3456-2.21:1972 which will be withdrawn on 1 April 1999 in accordance with the CENELEC Internal Regulations. Certificates and marks will not be awarded after this date wi
12、th regard to the withdrawn British Standard. However such certificates and marks, already awarded, may continue to apply to production until 1 April 2004. This British Standard is to be read in conjunction with BS EN 60335-1:1995 General requirements. The many references to Part 1 should be read as
13、references to BS EN 60335-1:1995, which is the English language version of EN 60335-1:1994 which was derived from IEC publication 335-1, third edition 1991, second impression 1993. Amendments and revisions of Part 1 have also to be taken into account and the dates when such changes become applicable
14、 will be stated in the relevant amendment or revision of Part 1. Product approval. Attention is drawn to the fact that products conforming to this British Standard may be approved by the British Electrotechnical Approvals Board for the purposes of participation in the CENELEC Certification Agreement
15、 and in the CB Scheme of the IECEE. (Details of the BEAB Approvals Scheme are given on the inside back cover.) A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a Britis
16、h 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 EN title page, pages 2 to 6, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates w
17、hen the document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:21:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60335-2-73 December 1996 ICS 91.140.10; 97.100Includes Corrigendum December 1999 Descriptors: Household el
18、ectrical appliances, immersion heaters, safety requirements, protection against electric shock, fire protection, protection against mechanical hazard English version Safety of household and similar electrical appliances Part 2: Particular requirements for fixed immersion heaters (IEC 335-2-73:1994,
19、modified) Scurit des appareils lectrodomestiques et analogues Partie 2: Rgles particulires pour les thermoplongeurs installs poste fixe (CEI 335-2-73:1994, modifie) Sicherheit elektrischer Gerte fr den Hausgebrauch und hnliche Zwecke Teil 2: Besondere Anforderungen fr ortsfeste Heizeinstze (IEC 335-
20、2-73:1994, modifiziert) This European Standard was approved by CENELEC on 1996-10-01. 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. Up-to-date li
21、sts 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 translation under the
22、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, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembo
23、urg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. 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
24、 1996 Copyright reserved to CENELEC members Ref. No. EN 60335-2-73:1996 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:21:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-73:1996 2 BSI 02-2001 Foreword The proposal to endorse IEC 335-2-73:1994, document CLC/TC 61 (SEC) 987, was
25、circulated under the enquiry procedure in December 1994. This proposal was discussed during the Amsterdam meeting in September 1995, when it was decided to submit a draft for EN 60335-2-73 to the formal vote. This draft was circulated in March 1996 and was ratified by CENELEC as EN 60335-2-73 on 199
26、6-10-01. This European Standard has been prepared by the secretariat of CENELEC Technical Committee TC 61. The following dates are applicable: For products which have complied with the relevant national standard before 1999-04-01, as shown by the manufacturer or by a certification body, this previou
27、s standard may continue to apply for production until 2004-04-01. This standard has to be used in conjunction with EN 60335-1, Safety of household and similar electrical appliances, Part 1: General requirements. It was established on the basis of the 1994 edition of that standard. Amendments and rev
28、isions of part 1 have also to be taken into account and the dates when such changes become applicable will be stated in the relevant amendment or revision of part 1. This part 2 supplements or modifies the corresponding clauses of EN 60335-1, so as to convert it into the European Standard: Safety re
29、quirements for electric fixed immersion heaters. Where a particular subclause of part 1 is not mentioned in this part 2, that subclause applies as far as is reasonable. Where this standard states “addition”, “modification” or “replacement”, the relevant text of part 1 is to be adapted accordingly. S
30、ubclauses which are additional to those in part 1 are numbered starting with 101. There are no special national conditions causing a deviation from this European Standard, other than those listed in annex ZA to EN 60335-1. There are no national deviations from this European Standard, other than thos
31、e listed in annex ZB to EN 60335-1. NOTEThe following print types are used: requirements: in roman type; test specifications: in italic type; notes: in small roman type. Words in bold in the text are defined in clause 2. When a definition of part 1 concerns an adjective, the adjective and the associ
32、ated noun are also in bold. Contents Page Foreword 2 1Scope3 2Definitions3 3General requirement3 4General conditions for the tests3 5Void3 6Classification3 7Marking and instructions3 8Protection against access to live parts4 9Starting of motor-operated appliances4 10Power input and current4 11Heatin
33、g4 12Void4 13Leakage current and electric strength at operating temperature4 14Void4 15Moisture resistance4 16Leakage current and electric strength4 17Overload protection of transformers and associated circuits4 18Endurance4 19Abnormal operation4 20Stability and mechanical hazards4 21Mechanical stre
34、ngth4 22Construction4 23Internal wiring5 24Components5 25Supply connection and external flexible cords5 26Terminals for external conductors5 27Provision for earthing5 28Screws and connections5 29Creepage distances, clearances and distances through insulation5 30Resistance to heat, fire and tracking5
35、 31Resistance to rusting5 32Radiation, toxicity and similar hazards5 Annexes6 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1997-04-01 date on which national standards conflicting with the EN have to be wi
36、thdrawn(dow) 1999-04-01 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:21:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-73:1996 BSI 02-20013 1 Scope This clause of part 1 is replaced by: This standard deals with the safety of fixed immersion heaters for household and similar pu
37、rposes intended for installation in a water tank ?open to the atmosphere? for heating water to a temperature below its boiling-point. The rated voltage is not more than 250 V for single-phase immersion heaters and 480 V for other immersion heaters. NOTE 1The water tank may have alternative means for
38、 heating water such as the circulation of hot water supplied from a separate boiler. NOTE 2Immersion heaters having a rated power input up to 25 kW for incorporation as an alternative heating source in central heating boilers are also within the scope of this standard. Appliances not intended for no
39、rmal household use but which nevertheless may be a source of danger to the public, such as appliances intended to be used by laymen in shops, in light industry and on farms, are within the scope of this standard. So far as is practicable, this standard deals with the common hazards presented by appl
40、iances which are encountered by all persons in and around the home. This standard does not in general take into account: the use of appliances by young children or infirm persons without supervision; playing with the appliance by young children. NOTE 3Attention is drawn to the fact that for applianc
41、es intended to be used in vehicles or on board ships or aircraft, additional requirements may be necessary; for appliances intended to be used in tropical countries, special requirements may be necessary; in many countries additional requirements are specified by the national health authorities, the
42、 national authorities responsible for the protection of labour, the national water supply authorities and similar authorities. NOTE 4This standard does not apply to appliances intended exclusively for industrial purposes; appliances intended to be used in locations where special conditions prevail,
43、such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas); aquarium heaters (IEC 335-2-55); portable immersion heaters (IEC 335-2-74); engine preheaters such as those for cars and buses; heating elements incorporated in appliances such as appliances for heating liquids (IEC 3
44、35-2-15); storage water heaters (IEC 335-2-21); instantaneous water heaters (IEC 335-2-35). 2 Definitions This clause of part 1 is applicable except as follows: 2.2.9 Replacement: 2.2.9 normal operation immersion heaters are installed according to the instructions for installation in the smallest ta
45、nk specified which is filled with cold water, the tank being thermally insulated NOTEAccessible parts of the immersion heater are not thermally insulated. 3 General requirement This clause of part 1 is applicable. 4 General conditions for the tests This clause of part 1 is applicable except as follo
46、ws: 4.2 Addition: NOTEAdditional immersion heaters may be needed for the tests of clause 19. 5 Void 6 Classification This clause of part 1 is applicable except as follows: 6.1 Addition: Immersion heaters shall be class I, class II, or class III. ? ? 7 Marking and instructions This clause of part 1 i
47、s applicable except as follows: 7.1 Modification: Immersion heaters for multiple supply shall be marked with the rated power input for each circuit. Addition: Immersion heaters shall be marked “Do not cover”. 7.7 Addition: The terminals of each circuit of immersion heaters for multiple supply shall
48、be identified. 7.12.1 Addition: Instructions for installation shall include the following: type and dimensions of the tank in which the immersion heater can be installed; positioning of the immersion heater within the tank; a statement that the installer must check that there is water in the tank be
49、fore the immersion heater is first switched on. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:21:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-73:1996 4 BSI 02-2001 ? a statement that the immersion heater is only to be installed in a system where the heating element is always below water level, such as in a cistern-fed tank, if applicable.? 8 Protection against access to live parts This clause of part 1 is applicable. 9 Starting of motor-operated appliances This clause of part 1 is