10 C.D.U./U.D.C.: 621.316.53-756621.316.925.43621.315.684-777 COMMISSION ELECTROTECHNIQUEINTERNATIONALE NORME DE LA CEI INTERNATIONAL ELECTROTECHNICAL COMMISSION IEC STANDARD Publication 158-1 C 1982 Troisieme complement a la Publication 158-1 (1970) Appareillage de commande a basse tension Premiere partie : Contacteurs Third supplement to Publication 158-1 (1970) Low-voltage controlgear Part 1 : Contactors Keywords:contactors providedwith Mots clés: contacteurs pourvus de overloadprotection; protection contre la relays. surcharge; relais. CCEI1982 Droits de reproduction reserves -Copyright - all rights reserved Aucune partie de ctte publication ne peut etre reproduite ni utliste sous form or by any means, eleqtronie or mechanicat, including photocopying quelque forme que ce soit ot par aucun procede, electronique ou maca- and microtilm, without permission in writing from the publisher. niqueycomprislaphotocopie et les microfilms,sans I'accord critdeI'editeur. Bureau Central de la Commission Electrotechnigque Internationale 1, rue de Varembe Geneve, Suisse IEd VoL.G 158-1CCIEC1982 INTERNATIONAL ELECTROTECHNICAL COMMISSION Third supplement to Publication 158-1 (1970) LOW-VOLTAGE CONTROLGEAR Part 1: Contactors FOREWORD I) The formal decisions or agreements of the I E C on technical matters, prepared by Technical Committees on which all the National Committees having a special interest therein are represented, express, as nearly as possible, an international consensus ofopiniononthesubjectsdealtwith. 2) They have the form of recommendations for international use and they are accepted by the National Committees in that sense 3) In order to promote international unification, the I E C expresses the wish that all National Committees should adopt the text of the iE C recommendation for their national rules in so far as national conditions will permit. Any divergence between the I E C recommendation and the corresponding national rules should, as far as possible, be clearly indicated in the latter. PREFACE This standard has been prepared by Sub-Committee 17B: Low-voltage Switchgear and Controlgear, of I E C Technical Committee No. 17: Switchgear and Controlgear. It forms the third supplement to Publication 158-1 (1970). A first draft was discussed at the meeting held in Moscow in 1977 and a second draft was discussed at the meeting held in Sofia in 1978. As a result of this meeting, a draft, Document 17B(Central Office)107, was submitted to the National Committees for approval under the Six Months' Rule in July 1979. Amendments, Document 17B(Central Office)112, were submitted to the National Committees for approval under the Two Months' Procedure in October 1980. The National Committees of the following countries voted explicitly in favour of publication: Argentina France Romania Australia Germany Spain South Africa (Republic of) Hungary Austria Sweden Belgium Japan Italy Turkey Bulgaria United Kingdom Canada Israel Korea (Democratic People's United States of America China Republic of) Yugoslavia Denmark Egypt Netherlands Poland Finland 158-1C @IEC 1982 Other IEC publications quoted in this standard: Publications Nos. 50(441): International Electrotechnical Vocabulary (I.E.V.), Chapter 441: Switchgear and Controlgear. Low-voltage Switchgear and Controlgear, Part 1: Circuit-breakers. 157-1 : 158-1: Low-voltage Controlgear, Part 1: Contactors. 292-1:. Low-voltage Motor Starters, Part 1 : Direct-on-line (Full Voltage) A.C. Starters. Control Switches (Low-voltage Switching Devices for Control and Auxiliary Circuits, 337-1: including Contactor Relays), Part 1: General Requirements. 337-2: Part 2: Special Requirements for Specific Types of Control Switches. Section One: Push- buttons and Related Control Switches. 408: Low-voltage.Air-break Switches, Air-break Disconnectors, Air-break Switch-dis- connectors andFuse-combination Units. Identification of Apparatus Terminals and General Rules for a Uniform System of 445: Terminal Marking, Using