BS 5424 : Part 3 : 1988 IEC 158-3 : 1985 UDC [621.316.3/.5].027.2:[621.316.53+006.063] British Standard Specification for Controlgear for voltages up to and including 1000 V a.c. and 1200 V d.c. Part 3. Additional requirements for contactors subject to certification Appareillage de commande pour tensions inferieurs ou égales a 1ooo V en courant alternatif et 1200 V en courant continu Partie 3. Prescriptions complementaires pour contacteurs sujets a certification Schaltgerate fur Spannungen bis zu 1000 V Wechselspannung und 1200 V Gleichspannung Teil 3. Zusatzanforderungen fur Schutze, die der Zertifizierung unterliegen BSi NOCOPYINGWITHOUTBSIPERMISSIONEXCEPTASPERMITTEDBYCOPYRIGHTLAW British Standards BS5424:Part3:1988 National foreword This Part of BS 5424 has been prepared under the direction of the Power Electrical Engineering Standards Committee. It is identicalwithPublication158-3:1985'Lowvoltagecontrolgear.Part3:Additionalrequirementsforcontactors subject to certification, published by the International Electrotechnical Commission (IEC). BSI BS 5424consists of the following Parts: , Uncontrolled Copy, (c) Part I : 1977Contactors Part2:1987Specificationforsemiconductorcontactors(solidstatecontactors) Part 3 : 1987 Additional requirements for contactors subject to certification Terminology and conventions. The text of the international standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following. The comma has been used in some places as a decimal marker. In British Standards it is curent practice to use a full point on thebaselineasthedecimalmarker References to page numbers in the text relate to IEC page numbers given in brackets at the bottom of each page. Cross-references International standard Corresponding British Standard IEC73:1984 BS 4099 Colours ofindicator lights, push-buttons, annunciators and digital readouts Part 1 : 1986 Specification for colours ofindicator lights and push-buttons (ldentical) IEC 44:1963 BS 5420 : 1977 Specification for degrees of protection of enclosures of switchgear and controlgear for voltages up to and including 1000 V a.c. and 1200 V d.c. (Ildentical) BS 2844 : 1972 Memorandum on conditioning of solid eletrical insulating materials prior to IEC212:1971 and during testing (Technically equivalent) BS 4794 Specification for control switchesl switches (switching devices including contactor IEC337-1:1970 relays,for control and auxiliary circuits, for voltages up to andincluding 10oo V a.c. and 1200 V d.c.) Part 1 : 1979 General requirements (ldentical) IEC 695-2-1 : 1980 BS 6458 Fire hazard testing for electrotechnical products Part 2 : Methods of test Section 2.1 : 1984 Glow-wire test (ldentical) The related British Standard to IEC 158-1 is BS 5424 : Part 1 : 1977. The TechnicalCommittee has reviewed the provisions ofIEC 158-1 : 1970 plus Amendment 1 : 1983, IEC 158-1A : 1975, IEC 158-1B : 1979 andIEC 158-1C : 1982 to which reference is made in the text and has decided that they are acceptable for use in conjunction with this standard Copies of ASTM documents may be purchased through BSI Sales Department, Linford Wood, Milton Keynes MK14 6LE. Compliance with a British Standard does not of itself confer immunity from legal obligations. BSI AMD 6446 Amendment No. 1 published and effective from 21 December 1990 toBS5424:Part3:1988 Specification for controlgear for voltages up to and including 1000 V a.c. and 1200 V d.c. Part 3. Additional requirements for contactors subject to certification NOTE. This amendment is being published to effect the implementation of CENELECHD419.3S1. Revised text Front cover AMD6446 December1990 Delete IEC 158-3 : 1985 at the top right hand side. Underneath the title insert the following: (ImplementationofCENELECHD419.3S1)'. AMD6446 National foreword December1990 Delete paragraph 1 and in