1、C.D.U./U.D.C.:621.316.53.024.027.512.064.3001.4COMMISSION ELECTROTECHNIQUE INTERNATIONALE(ffllionde Normalisation-S)NORME DE LA CEIINTERNATIONAL ELECTROTECHNICAL COMMISSION(affiiated to theneOrganizationfor Standardization-)IEC STANDARDPublication 158-1A1975Premier complement a la Publication 158-1(
2、1970)Appareillage de commande a basse tensionPremiere partie:ContacteursFirst supplement to Publication 158-1(1970)Low-voltage controlgearPart 1:Contactors用TAA八a:1:ATIONAL ENERGY ATHOITYDroits de reproduction rserves-Copyright-all rights reservedAucume partie de ctte publicatione peut tre reproduite
3、 ni utiisde souNo part of this publication may e reproduced or utilized im anyquelque forme que ce solt et par aucun procede,electronique ou meca-form or by any means,electromie or mechanical,including photocopyingmique,y compris la photocopie et les microfilms.sans accord crit de Iditeur.and microf
4、ilm,without permission in writing from the publisher.Bureau Central de la Commission Electrotechnique Internafionale1,rue de VarembeGeneve,SuisseTEdPrix Fr.s.Price S.Fr.23.-VoL.A-5FIRST SUPPLEMENT TO IEC PUBLICATION 158-1LOW-VOLTAGE CONTROLGEARPart 1:Contactors(Second edition-1970)APPENDIX DDIConven
5、tional test circuits for the verification of rated making and breaking capacities of contactors inutilization categories AC-1 and AC-2D1.1 Test circuit for utilization category AC-1If a contactor has been tested for category AC-3 or category AC-4 with a rated operational current0Ie,it needs no furth
6、er test for making and breaking capacities in utilization category AC-1 providedits rated operational current for AC-1 does not exceed 2.5 times Ie.In other cases,its making and breaking capacities shall be verified with a test circuit comprising:一a substantially non-inductive load(cosp=0.950.05)；-a
7、 low-impedance supply circuit with a prospective short-circuit current at least 30 times the ratedoperational current of the contactor(but not necessarily exceeding 30 kA).D1.2 Test circuit for utilization category AC-2If a contactor has been tested for category AC-3 or category AC-4 with a rated op
8、erational currentle,it needs no further test for making and breaking capacities in utilization category AC-2 providedits rated operational current for AC-2 does not exceed 2 times Ie.In other cases,its making and breaking capacities shall be verified with a test circuit similar to theone used for ut
9、ilization categories AC-3 and AC-4 with the values for current,voltage and power-factor given for category AC-2 in Table II of Clause 4.3.6 of Publication 158-1,the values for tran-sient recovery voltage natural frequency fand factor y being those appearing in Clause D2.2 of thisSupplement.D2Convent
10、ional test circuit for verification of rated making and breaking capacities of contactors inutilization categories AC-3 and AC-4Nore.-This test circuit shall also be utilized for the verification of electrical endurancein category AC-4(see Clause8.4.1 of Publication 158-1).D2.1 GeneralThe test circuit comprises the supply source,the contactor under test and the load circuit.Theprospective short-circuit current at the point of connection to the supply terminals of the contactorshall be at least ten times the value of the test current,or at least 50 kA,whichever is the lower.
