IEC_60337-1-1970_scan.pdf

一3一CONTENTSPage5FOREWORD,5PREFACEClause1.General.71.1 Scope91.2 Object.92.Definitions3.Classification.17174.Characteristics.4.1 Operation in service.14.2 Rated quantities for contact elements7234.3 Mechanical endurance,.。234.4 Electrical endurance.,4.5 Frequency of on-load operating cycles234.6 Electrically separated contact elements235.Nameplates.,256.Standard conditions of service.277.Standard conditions for construction.29&.Tests on contact elements.,.8.0 Test quantities.298.1 Type tests.78.2 Routine tests.,.378.3 Special tests.,.39,42and43FIGURES.5INTERNATIONAL ELECTROTECHNICAL COMMISSIONCONTROL SWITCHES(LOW-VOLTAGE SWITCHING DEVICESFOR CONTROL AND AUXILIARY CIRCUITS,INCLUDING CONTACTOR RELAYS)Part 1:General requirementsFOREWORD1)The formal decisions or agreements of the IEC on technical matters,prepared by Technical Committees on which all theNational Committees having a special interest therein are represented,express,as nearly as possible,an internationalconsensus of opinion on the subjects dealt with.2)They have the form of recommendations for international use and they are accepted by the National Committees in that3)In order to promote this international unification,the IEC expresses the wish that all National Committees having assense.yet no national rules,when preparing such rules,should use the IEC recommendations as the fundamental basis for theserules in so far as national conditions will permit.4)The desirability is recognized of extending international agreement on these matters through an endeavour to harmonizenational standardization rules with these recommendations in so far as national conditions will permit.The NationalCommittees pledge their influence towards that end.PREFACEThis Recommendation has been prepared by Sub-Committee 17B,Low-voltage Switchgear andControlgear,of IEC Technical Committee No.17,Switchgear and Controlgear.Work was commenced during the meeting of the Sub-Committee held in New Delhi in 1960,whenthe Secretariat was entrusted with reviewing a first preliminary draft.The next document was examinedduring the meeting held in Bucharest in 1962 where it was decided to limit the work,in a first step,todefinitions,nomenclature and general requirements.The next drafts were examined during the meetingsheld in Bergamo in 1963,in Prague in 1964,in Tokyo in 1965,in Paris in 1967 and in Brussels in 1968.As a result of this latter meeting,the final draft was submitted to the National Committees for approvalunder the Six MonthsRule in May 1969.The following countries voted explicitly in favour of publication:NetherlandsAustraliaAustriaNorwayPolandBelgiumCanadaSouth AfricaSwedenDenmarkFranceSwitzerlandTurkeyGermanyUnion of Soviet Socialist RepublicsHungaryUnited KingdomIranUnited States of America*IsraelItalyYugoslavia*With the exception of the Note of Clause 7.2.一7一CONTROL SWITCHES(LOW-VOLTAGE SWITCHING DEVICESFOR CONTROL AND AUXILIARY CIRCUITS,INCLUDING CONTACTOR RELAYS)Part 1:General requirements1.General1.1ScopeThis Recommendation applies to mechanical switching devices intended to be installed incontrol circuits or auxiliary circuits of switchgear and controlgear for the purpose of controlling,signalling,interlocking,etc.These devices are intended to perform solely switching operationsand include micro-gap switches.Nore.-Proximity switching devices and contactless switching devices are not considered in this Recommenda-tion,but will be dealt with at a later stage.This Recommendation applies only to devices,the rated insulation voltage of which doesnot exceed 1000 V a.c.(at a frequency not exceeding 1000 Hz)or 1 200 V d.c.In this Recommendation,the general term control switchwill be used for such devices.Control switches are inter alia:-manual control switches,e.g.:push-buttons,rotary switches,foot switches,etc.;-electromagnetically operated control switches,either time-delayed or instantaneous,e.g.:contactor relays;-pilot switches,e.g.:pressure switches,temperature sensitive switches(thermostats),pro-grammers,etc.;-position switches,e.g.:limit switches or other control switches operated by part of a machineor mechanism.This Recommendation does not cover switching devices intended for isolating purposes.Mechanical switching devices serving the purpose of control switches,but forming an integralpart of another mechanical switching device,such as certain control contacts of contactors orof circuit-breakers,are not covered by this Recommendation.However,if they are self-containedand can be used independently,they shall satisfy this Recommendation.Mechanical switching devices,covered by other Recommendations and used as controlswitches shall also comply with the appropriate clauses of this Recommendation.Protective relays(e.g.:overload relays)are not considered to be control switches.