1、 IEC 60335-2-21 Edition 6.0 2012-11 INTERNATIONAL STANDARD NORME INTERNATIONALE Household and similar electrical appliances Safety Part 2-21: Particular requirements for storage water heaters Appareils lectrodomestiques et analogues Scurit Partie 2-21: Rgles particulires pour les chauffe-eau accumul
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16、-11 INTERNATIONAL STANDARD NORME INTERNATIONALE Household and similar electrical appliances Safety Part 2-21: Particular requirements for storage water heaters Appareils lectrodomestiques et analogues Scurit Partie 2-21: Rgles particulires pour les chauffe-eau accumulation INTERNATIONAL ELECTROTECHN
17、ICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE U ICS 13.120; 91.140.65 PRICE CODE CODE PRIX ISBN 978-2-83220-452-8 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this
18、 publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 60335-2-21 IEC:2012 CONTENTS FOREWORD . 4 INTRODUCTION . 7 1 Scope . 8 2 Normative references . 9 3 Terms and definitions . 9 4 General requirement . 10 5 G
19、eneral conditions for the tests 10 6 Classification 10 7 Marking and instructions . 10 8 Protection against access to live parts 12 9 Starting of motor-operated appliances 12 10 Power input and current 12 11 Heating. 12 12 Void 12 13 Leakage current and electric strength at operating temperature 12
20、14 Transient overvoltages . 12 15 Moisture resistance 12 16 Leakage current and electric strength . 12 17 Overload protection of transformers and associated circuits . 13 18 Endurance 13 19 Abnormal operation 13 20 Stability and mechanical hazards 14 21 Mechanical strength . 14 22 Construction . 14
21、23 Internal wiring . 16 24 Components . 16 25 Supply connection and external flexible cords 18 26 Terminals for external conductors . 18 27 Provision for earthing . 18 28 Screws and connections . 18 29 Clearances, creepage distances and solid insulation 18 30 Resistance to heat and fire . 18 31 Resi
22、stance to rusting 19 32 Radiation, toxicity and similar hazards 19 Annexes . 22 Annex A (informative) Routine tests . 22 Annex R (normative) Software evaluation 23 Annex AA (normative) Additional requirement for immersion heater units intended for the installation in heat exchange closed water heate
23、rs 24 Bibliography 27 60335-2-21 IEC:2012 3 Figure 101 Examples of types of storage water heaters . 20 Figure 102 Example of positions of the thermocouples . 21 4 60335-2-21 IEC:2012 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES SAFETY Part 2-21: Particular
24、requirements for storage water heaters FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all ques
25、tions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication
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27、aborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion
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33、 and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication
34、. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. This part of International Standard IEC 60335 has been prepared by IEC technical committe
35、e 61: Safety of household and similar electrical appliances. This sixth edition cancels and replaces the fifth edition published in 2002 including its Amendment 1 (2004) and its Amendment 2 (2008). It constitutes a technical revision. The principal changes in this edition as compared with the fifth
36、edition of IEC 60335-2-21 are as follows (minor changes are not listed): added requirements for immersion heater units (fixed immersion heaters); removed reference to ISO 13732-1 from Bibliography. 60335-2-21 IEC:2012 5 The text of this standard is based on the following documents: FDIS Report on vo
37、ting 61/4452/FDIS 61/4505/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. This part 2 is to be used in conjunction with the lat
38、est edition of IEC 60335-1 and its amendments. It was established on the basis of the fifth edition (2010) of that standard. NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1. This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to convert th
39、at publication into the IEC standard: Safety requirements for storage water heaters. When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies as far as is reasonable. When this standard states “addition”, “modification” or “replacement”, the relevant text in Part
40、 1 is to be adapted accordingly. NOTE 2 The following numbering system is used: subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1; unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including those i
41、n a replaced clause or subclause; additional annexes are lettered AA, BB, etc. NOTE 3 The 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 3. When a definition concerns an adj
42、ective, the adjective and the associated noun are also in bold. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, th
43、e publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing organizations may need a transitional period following publication of a new, amended or revised IEC publi
44、cation in which to make products in accordance with the new requirements and to equip themselves for conducting new or revised tests. It is the recommendation of the committee that the content of this publication be adopted for implementation nationally not earlier than 12 months or later than 36 mo
45、nths from the date of publication. A list of all parts of the IEC 60335 series, under the general title: Household and similar electrical appliances Safety, can be found on the IEC website. The following differences exist in the countries indicated below. 6.1: Class 0I appliances are allowed (Japan)
46、. 6 60335-2-21 IEC:2012 6.2: IPX0 water heaters are allowed (France, United Kingdom and USA). 7.1: Additional markings are required (Australia, New Zealand and South Africa). 7.1: The rated pressure is to be marked in pounds per square inch (USA). 7.1: Open outlet water heaters are not required to b
47、e marked with rated pressure (USA). 7.12.1: Additional instructions are required (South Africa). 11.7: The test is different (USA). 13.2: An additional leakage current test is required (China). 19.1: Appliances incorporating sheathed heating elements are not required to have an outer enclosure of me
48、tal but their rated power input is limited to 12 kW (USA). 19.101: The test is different (USA). 22.47: The minimum pressure is 2,1 MPa. The test is not carried out on water heaters having a capacity less than 2 l or on appliances having containers open to the atmosphere (USA). 22.101: Pressure reduc
49、ing valves have to be designed for an inlet pressure of 2 MPa (South Africa). 22.102: The temperature limit is 95 C (South Africa). 22.102: The temperature limit is 85 C (USA). 22.101: The minimum rated pressure is 1,0 MPa (Denmark, Finland, Norway and Sweden). 22.103: Closed water heaters having a capacity exceeding 50 l or a rated power input exceeding 2 kW have to incorporate a
