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1、BRITISH STANDARD BS EN 60335-2-74:1996 IEC 335-2-74: 1994 Specification for Safety of household and similar electrical appliances Part 2: Particular requirements Section 2.74 Portable immersion heaters The European Standard EN 60335-2-74:1996 has the status of a British Standard ICS 97.040.50 Licens
2、ed Copy: sheffieldun sheffieldun, na, Mon Nov 13 17:15:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60335-2-74:1996 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 eff
3、ect on 15 December 1996 BSI 10-1998 The following BSI references relate to the work on this standard: Committee reference CPL/61/30 Draft for comment 91/32077 DC ISBN 0 580 26730 X Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Co
4、mmittee CPL/61, Safety of electrical appliances, to Subcommittee CPL/61/30, Heating appliances (other than room heaters), upon which the following bodies were represented: Association of Control Manufacturers (BEAMA Ltd.) Association of Manufacturers of Domestic Electrical Appliances British Burn As
5、sociation British Electrotechnical Approvals Board Consumer Policy Committee of BSI Department of Trade and Industry (Consumer Safety Unit, CA Division) Electricity Association Royal Society for the Prevention of Accidents Small Electrical Appliances Marketing Association Amendments issued since pub
6、lication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 17:15:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60335-2-74:1996 BSI 10-1998i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 60335-2-745 Licensed Copy: sheff
7、ieldun sheffieldun, na, Mon Nov 13 17:15:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60335-2-74:1996 ii BSI 10-1998 National foreword This British Standard has been prepared by Subcommittee CPL/61/30 and is the English language version of EN 60335-2-74:1996, Safety of household and similar e
8、lectrical appliances Part 2: Particular requirements for portable immersion heaters published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 335-2-74:1994, published by the International Electrotechnical Commission (IEC) and which has the same titl
9、e as the European Standard. This British Standard supersedes BS 3456-3.21:1981 which will be withdrawn on 1 January 1999 in accordance with the CENELEC Internal Regulations. Certification and marks will not be awarded after this date with respect to BS 3456-3.21:1981. However, such certificates and
10、marks, already awarded, may continue to apply for production until 1 January 2004. This British Standard is to be read in conjunction with BS EN 60335-1:1995 Specification for safety of household and similar electrical appliances Part 1: General requirements. The many references to Part 1 should be
11、read as references to BS EN 60335-1, which is the English language version of EN 60335-1:1994 which was derived from the second impression, 1993, of IEC publication 335-1 (third edition 1991). Amendments and revisions of Part 1 have also to be taken into account and the dates when such changes becom
12、e applicable 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 Certificati
13、on Agreement and in the CB Scheme of the IECEE. (Details of the BEAB Approval 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 wi
14、th a British 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 8, an inside back cover and a back cover. This standard has been updated (see copyright date)
15、and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 17:15:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60335-2-74 July 1996 ICS
16、97.040.50Supersedes HD 262 S1:1977 and its modifications Descriptors: Household electrical appliances, immersion heaters, safety requirements, protection against electric shock, fire protection, protection against mechanical hazard English version Safety of household and similar electrical appliance
17、s Part 2: Particular requirements for portable immersion heaters (IEC 335-2-74:1994) Scurit des appareils lectrodomestiques et analogues Partie 2: Rgles particulires pour les thermoplongeurs mobiles (CEI 335-2-74:1994) Sicherheit elektrischer Gerte fr den Hausgebrauch und nhliche Zwecke Teil 2: Beso
18、ndere Anforderungen fr ortsvernderliche Tauchheizgerte (IEC 335-2-74:1994) This European Standard was approved by CENELEC on 1996-07-02. 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 nati
19、onal standard without any alteration. 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 i
20、n 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 same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France
21、, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, 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 Centr
22、al Secretariat: rue de Stassart 35, B-1050 Brussels 1996 Copyright reserved to CENELEC members Ref. No. EN 60335-2-74:1996 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 17:15:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-74:1996 2 BSI 10-1998 Foreword The proposal to endorse IE
23、C 335-2-74:1994, document CLC/TC 61(SEC)969, was circulated under the enquiry procedure in July 1994. This proposal was discussed during the Dublin meeting in May 1995, when it was decided to submit a draft for EN 60335-2-74 to the formal vote. This draft was circulated in January 1996 and was ratif
24、ied by CENELEC as EN 60335-2-74 on 1996-07-02. 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 HD 262 S1:1977 + HD 262.2 S1:1978 + HD 262.3 S1:1989 + HD 262.4 S1:1990 before 19
25、99-01-01, as shown by the manufacturer or by a certification body, this previous standard may continue to apply for production until 2004-01-01. 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 es
26、tablished on the basis of the 1994 edition of that standard. Amendments and revisions 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 c
27、lauses of EN 60335-1, so as to convert it into the European Standard: Safety requirements for electric portable 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”, “modificat
28、ion” or “replacement”, the relevant text of Part 1 is to be adapted accordingly. Subclauses 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 6033
29、5-1. There are no national deviations from this European Standard, other than those 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
30、2. When a definition of Part 1 concerns an adjective, the adjective and the associated noun are also in bold. latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 1997-01-01 date on which national standards confli
31、cting with the EN have to be withdrawn(dow) 1999-01-01 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 17:15:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-74:1996 BSI 10-19983 Contents Page Foreword2 1Scope5 2Definitions5 3General requirement5 4General conditions for the tests5 5Vo
32、id5 6Classification5 7Marking and instructions5 8Protection against access to live parts5 9Starting of motor-operated appliances5 10Power input and current5 11Heating5 12Void6 13Leakage current and electric strength at operating temperature6 14Void6 15Moisture resistance6 16Leakage current and elect
33、ric strength6 17Overload protection of transformers and associated circuits6 18Endurance6 19Abnormal operation6 20Stability and mechanical hazards6 21Mechanical strength6 22Construction6 23Internal wiring6 24Components6 25Supply connection and external flexible cords6 26Terminals for external conduc
34、tors6 27Provision for earthing6 28Screws and connections6 29Creepage distances, clearances and distances through insulation6 30Resistance to heat, fire and tracking6 31Resistance to rusting6 32Radiation, toxicity and similar hazards6 Annexes7 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 17
35、:15:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 17:15:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-74:1996 BSI 10-19985 1 Scope This clause of part 1 is replaced by: This standard deals with the safety of portable immersion
36、 heaters for household and similar purposes, their rated voltage being not more than 250 V. Appliances not intended for normal 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
37、within the scope of this standard. So far as is practicable, this standard deals with the common hazards presented by appliances 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
38、without supervision; playing with the appliance by young children. NOTE 1Attention is drawn to the fact that: for appliances 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 requi
39、rements may be necessary; in many countries additional requirements are specified by the national health authorities, the national authorities responsible for the protection of labour, the national water supply authorities and similar authorities. NOTE 2This standard does not apply to: appliances in
40、tended exclusively for industrial purposes; appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas); aquarium heaters (IEC 335-2-55); fixed immersion heaters (IEC 335-2-73); heating elements incor
41、porated in portable appliances such as appliances for heating liquids (IEC 335-2-15). 2 Definitions This clause of part 1 is applicable except as follows: 2.2.9 Replacement: normal operation immersion heaters are placed in a vessel which is filled with a quantity of cold water sufficient to immerse
42、the appliance to the minimum depth of immersion 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 follows: 4.3 Addition: The additional test of clause 21 is made before the test of clause 8. 5 Void 6 Classifica
43、tion This clause of part 1 is applicable except as follows: 6.2 Addition: Immersion heaters shall be at least IPX7. 7 Marking and instructions This clause of part 1 is applicable except as follows: 7.1 Addition: Immersion heaters shall be marked with the maximum and minimum depths of immersion. NOTE
44、 1The depths of immersion may be indicated by lines only, provided the meaning of these lines is given in the instructions for use. NOTE 2The marking is not required on appliances intended to float. 7.12 Addition: The instructions for use shall give details of suitable vessels to be used with the im
45、mersion heater. They shall include the substance of the following: the immersion heater is to be unplugged before removing it from the liquid; the heating element will remain hot after unplugging and it should not be touched or placed on combustible surfaces. 8 Protection against access to live part
46、s This clause of part 1 is applicable. 9 Starting of motor-operated appliances This clause of part 1 is not applicable. 10 Power input and current This clause of part 1 is applicable. 11 Heating This clause of part 1 is applicable except as follows: 11.7 Addition: Immersion heaters are operated for
47、15 min after the water temperature has reached 95 C. However, if this temperature cannot be attained, the immersion heater is operated for 15 min after the water temperature has stabilized or for 15 min after a thermal control has operated. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 17:1
48、5:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-74:1996 6 BSI 10-1998 12 Void 13 Leakage current and electric strength at operating temperature This clause of part 1 is applicable. 14 Void 15 Moisture resistance This clause of part 1 is applicable. 16 Leakage current and electric strength
49、 This clause of part 1 is applicable. 17 Overload protection of transformers and associated circuits This clause of part 1 is applicable. 18 Endurance This clause of part 1 is not applicable. 19 Abnormal operation This clause of part 1 is applicable except as follows: 19.1 Addition: Only immersion heaters for preventing the freezing of water in animal troughs are subjected to the tests of 19.4 and 19.5. 19.2 Addition: Immersion heaters are placed on the floor of the test corner in the most unfavourable position. 19.13