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1、BRITISH STANDARD BS EN 60335-2-26: 1991 Specification for Safety of household and similar electrical appliances Part 2: Particular requirements Section 2.26 Clocks This European Standard EN 60335-2-26:1990 has the status of a British Standard Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16
2、:47:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60335-2-26:1991 This British Standard was published under the authority of the Standards Board and comes into effect on 28 June 1991 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference LEL/161 Draft
3、 for comment 87/32377 DC ISBN 0 580 19631 3 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the National Committees of the following countries: AustriaItaly BelgiumLuxemburg Denmar
4、kNetherlands FinlandNorway FrancePortugal GermanySpain GreeceSweden IcelandSwitzerland IrelandUnited Kingdom Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:47:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60335-2-26:1991 BSI 1
5、1-1999i Contents Page Cooperating organizationsInside front cover National forewordii Brief history2 Foreword2 Text of EN 60335-2-263 National appendix NA (informative) Deletions from and IEC text amended by Common Modifications to IEC Publication 335-2-26:1987 second edition7 National appendix NB (
6、informative)8 National appendix NC (informative)8 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:47:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60335-2-26:1991 ii BSI 11-1999 National foreword This British Standard has been prepared under the direction of the Light Electrical Engi
7、neering Standards Policy Committee and is the English language version of EN 60335-2-26 “Safety of household and similar electrical appliances Part 2 Particular requirements for clocks”, published by the European Committee for Electrotechnical Standardization (CENELEC). It was derived by that organi
8、zation from IEC Publication 335-2-26:1987 second edition, which has the same title as the European Standard. The CENELEC Common Modifications have been implemented at the appropriate places in the text of IEC Publication 335-2-26:1987 second edition, and are indicated by a side line in the margin. T
9、he foreword and preface of IEC Publication 335-2-26:1987 second edition and the deleted parts of the original IEC text which do not form part of the text of EN 60335-2-26 have been quoted in National appendix NA. Annexes designated “normative” are part of the body of the standard. Annexes designated
10、 “informative” are given for information only. National appendices are designated “informative”. This British Standard is to be read in conjunction with BS 3456-201:1990 “General requirements”, which it supplements or modifies. The many references to Part 1 should be read as references to BS 3456-20
11、1, which is the English language version of EN 60335-1 which was derived from the 1983 reprint of IEC Publication 335-1:1976 second edition including Amendments 1, 2 and 3 to IEC 335-1. Until 1 January 1991 the Parts of EN 60335 published as British Standards were dual numbered and appeared as Secti
12、ons of BS 3456. From 1 January 1991 Parts of EN 60335 appear as Sections of BS EN 60335. This British Standard supersedes BS 3456-102.26:1988 which will be withdrawn by 1 January 1993 in accordance with the CENELEC Internal Regulations. Cross-references. The relationship between other international
13、publications quoted in this standard and British Standards which are either identical or technically equivalent, is given in National appendix NC. Product approval. Attention is drawn to the fact that products conforming to this British Standard may be approved by the British Electrotechnical Approv
14、als Board for the purposes of participation in the CENELEC Certification Agreement and in the CB Scheme of the IECEE. (Details of the BEAB Approval Mark 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 Bri
15、tish Standards are responsible for their correct application. Compliance with 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 c
16、over and a back cover. This standard has been updated (see copyright date) 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 16:47:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUR
17、OPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60335-2-26 November 1990 UDC 64.06-83:681.11:614.8Supersedes HD 255 S2:1983 Descriptors: Household electrical appliances, clocks, safety requirements, protection against electric shocks, fire protection, protection against mechanical hazard English v
18、ersion Safety of household and similar electrical appliances Part 2: Particular requirements for clocks (IEC 335-2-26:1987, modified) Scurit des appareils lectrodomestiques et analogues Deuxime partie: Rgles particulires pour les horloges (CEI 335-2-26:1987, modifie) Sicherheit elektrischer Gerte fr
19、 den Hausgebrauch und hnliche Zwecke Teil 2: Besondere Anforderungen fr Uhren (IEC 335-2-26:1987, modifiziert) This European Standard was approved by CENELEC on 5 December 1989. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving th
20、is European Standard the status of a national 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 versio
21、ns (English, French, German). A version in 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 A
22、ustria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Ko
23、mitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1990 Copyright reserved to CENELEC members Ref. No. EN 60335-2-26:1990 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:47:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-26:1990 BSI 11-19
24、99 2 Brief history The proposal to endorse the second edition of IEC Publication 335-2-26, document CLC/TC 61 (SEC) 557, was circulated under the enquiry procedure in May 1987. This proposal was discussed during the Neusiedl meeting in May 1988 when it was decided to submit a draft for EN 60335-2-26
25、 to the voting procedure. This procedure started in April 1989. The text of this draft was ratified by the CENELEC Technical Board on the 5th of December 1989. Foreword This European Standard has been prepared by the Secretariat of CENELEC Technical Committee 61. The following dates are applicable:
26、This European Standard replaces HD 255 S2:1983. For products which have complied with HD 255 S2:1983 before 1993-01-01, as shown by the manufacturer or by a certification body, this previous standard may continue to apply for production until 1998-01-01. This document supplements or modifies the cor
27、responding clauses of IEC 335-2-26:1987, so as to convert that standard into the European Standard EN 60335-2-26. This standard has to be used in conjunction with EN 60335-1:1988, Safety of household and similar electrical appliances, Part 1: General requirements, including its amendments A2:1988, A
28、5:1989 and A6:1989. 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. Subclauses which are in additi
29、on to those in IEC 335-1 are numbered starting with 101. There are no special national conditions (snc) causing a deviation from this European Standard, other than those listed in Annex ZX of EN 60335-1. There are no national deviations from this European Standard, other than those listed in Annex Z
30、Y of EN 60335-1. The following print types are used: Contents Page Brief history2 Foreword2 1Scope3 2Definitions3 3General requirement3 4General notes on tests3 5Rating3 6Classification3 7Marking3 8Protection against electric shock3 9Starting of motor-operated appliances3 10Input and current3 11Heat
31、ing3 12Operation under overload conditions of appliances with heating elements3 13Electrical insulation and leakage current at operating temperature3 14Radio and television interference suppression3 15Moisture resistance3 16Insulation resistance and electric strength4 17Overload protection4 18Endura
32、nce4 19Abnormal operation4 20Stability and mechanical hazards4 21Mechanical strength4 22Construction4 23Internal wiring4 24Components4 25Supply connection and external flexible cables and cords5 26Terminals for external conductors5 27Provision for earthing5 28Screws and connections5 29Creepage dista
33、nces, clearances and distances through insulation5 30Resistance to heat, fire and tracking5 31Resistance to rusting5 32Radiation, toxicity and similar hazards5 Appendices6 Annexes6 date of announcement(doa) 1990-03-01 date of latest publication(dop) 1991-01-01 date of withdrawal of conflicting natio
34、nal standards(dow) 1993-01-01 requirements:in roman type: test specifications:in italic type; explanations:in small roman type. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:47:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-26:1990 BSI 11-19993 1 Scope This clause of Part 1 is
35、applicable except as follows: Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:47:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-26:1990 4 BSI 11-1999 16 Insulation resistance and electric strength This clause of Part 1 is applicable. 17 Overload protection This clause of Part 1 i
36、s applicable. 18 Endurance This clause of Part 1 is applicable except as follows: 18.1 Modification: Instead of the test specification, the following applies: For spring-driven clocks with an electrically-operated winding mechanism and for alarm systems of clocks, compliance is checked by the tests
37、of Sub-clauses 18.2 and 18.6. Other clocks are not tested for endurance. 18.2 Replacement: The clock is operated under normal load and at a voltage equal to 1.1 times rated voltage for 48 h, reduced by the running time necessary for the tests of Clauses 11 and 13. The clock is then operated under no
38、rmal load and at a voltage equal to 0.9 times rated voltage for a further 48 h. The clock is operated continuously or for a corresponding number of periods, each period being not less than 8 h. If the clock incorporates more than one motor, the operating times specified apply to each motor separatel
39、y. 19 Abnormal operation This clause of Part 1 is applicable except as follows: 19.1 Modification: Instead of the sub-clauses applicable, the following applies: For spring-driven clocks with an electrically-operated winding mechanism, and for clocks incorporating motors having capacitors in the circ
40、uit of an auxiliary winding, compliance is checked by the test of Sub-clause 19.6. Sub-clause 19.11 applies. Other clocks are not tested for abnormal operation. 19.6 Addition: Clocks incorporating capacitors or resistors to reduce the voltage for the motor are operated with the motor locked and with
41、 the capacitors or resistors short-circuited one at a time. Addition: The winding mechanism of spring-driven clocks is considered to have moving parts liable to be jammed. 20 Stability and mechanical hazards This clause of Part 1 is applicable. 21 Mechanical strength This clause of Part 1 is applica
42、ble except as follows: 21.1 Modification: Instead of the spring hammer adjustment specified, the following applies: The hammer spring is adjusted so that the product of the compression, in millimetres, and the force exerted, in newtons, equals 500, the compression being approximately 13 mm. With thi
43、s adjustment, the impact energy is 0.25 0.05 Nm. Addition: The blows are not applied to spindles of hands or to dial glasses, unless the clock does not comply with the requirements of Sub-clause 8.1 when the dial glass is removed, in which case the blows are also applied to the dial glass. 22 Constr
44、uction This clause of Part 1 is applicable except as follows: 22.19 Addition: If coil formers of non-rotating windings are used as reinforced insulation, they shall be moulded in one piece. Coil formers of other windings shall not be used as reinforced insulation. Additional sub-clause: 22.101 The s
45、witching mechanism of clocks controlling radio receivers and of clocks for similar purposes shall comply with the relevant IEC standard as far as is reasonable. Compliance is checked according to the relevant standard. 23 Internal wiring This clause of Part 1 is applicable. 24 Components This clause
46、 of Part 1 is applicable except as follows: 24.1 Addition: Switches incorporated in clocks are not required to be switches for frequent operation. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:47:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-26:1990 BSI 11-19995 25 Supply conn
47、ection and external flexible cables and cords This clause of Part 1 is applicable except as follows: 25.2 Modification: The requirement that appliances intended to be permanently connected to fixed wiring shall allow the connection of the supply wires after the appliance has been fixed to its suppor
48、t, applies only to drip-proof, splash-proof and watertight clocks, intended to be permanently connected to fixed wiring. 25.4 Modification: type Z attachment is allowed. 25.6 Modification: Instead of the types of cord specified the following applies: Power supply cords shall be not lighter than: if
49、polyvinyl chloride insulated, flat twin flexible cord (code designation HO3VHH); if robber insulated, braided flexible cord (code designation HO3RTF). 25.11 Addition: Knots in the cord are allowed for polyvinyl chloride insulated cord, in which case it shall be a simple overhand knot around a smooth stud or pin. 26 Terminals for external conductors This clause of Part 1 is applicable. 27 Provision for earthing This clause of Part 1 is applicable. 28 Screws and connections This clause of Part 1 is applicable. 29 Creepage distances, cle