IEC_60337-2-1972_scan.pdf

C.D.U./U.D.C.:621.316.54:651.3.027:621.316.519COMMISSION ELECTROTECHNIQUE INTERNATIONAL.E(afiliee a IOrganisation Internationale de Normalisation-ISO)RECOMMANDATION DE LA CEIINTERNATIONAL ELECTROTECHNICAL COMMISSION(affiliated to the International Organization for Standardization-ISO)IEC RECOMMENDATIONPublication 337-2Premiere edition-First edition1972Auxiliaires de commande(appareils de connexion a basse tensionpour des circuits de commande et des circuits auxiliaires,y comprisles contacteurs auxiliaires)Deuxieme partie:Prescriptions particulieres pour des types dtermins dauxiliaires de commandeSection Un:Boutons-poussoirs et auxiliaires de commande analoguesControl switches(low-voltage switching devices for control*and auxiliary circuits,including contactor relays)Part 2:Special requirements for specific types of control switchesSection One:Push-buttons and related control switchesFOR REFEENCE ONLJSTANDARS ANU SISNATIONAL VERRY A HORITSDroits de reproduction reserves-Copyright-all rights reservedAucune partie de cette publication ne peut etre reproduite ni utilisle sous No part of this publication may be reproduced or utilized in anyquelque forme que ce soit et par aucun procd，lectronique ou mca-form or by any means,electronic or mechanical,including photocopyingnique,y compris la photocopie et les microfilms,sans Iaccord orit de Iditeur.and microfilm,without permision in writing from the publisher.Bureau Central de la Commission Electrotechnique Internationale1,rue de VarembeGeneve,SuisseIEdPrix Fr.s.19.50Price S.Fr.vol.a一3一CONTENTSPageFOREWORDPREFACE,Clause7l.General.71.1 Scope71.2 Object。2.Definitions3.Conditions for construction and application13174.Tests4.1 Type tests(making and breaking capacities).174.2 Operating machine for making and breaking capacity test.174.3 Special tests,1718 and 19FIGURES,5-INTERNATIONAL ELECTROTECHNICAL COMMISSIONCONTROL SWITCHES(LOW-VOLTAGE SWITCHING DEVICESFOR CONTROL AND AUXILIARY CIRCUITS,INCLUDING CONTACTOR RELAYS)Part 2:Special requirements for specific types of control switchesSECTION ONE:PUSH-BUTTONS AND RELATED CONTROL SWITCHESFOREWORD1)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 thatsense.3)In order to promote this international unification,the IEC expresses the wish that all National Committees having asyet 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 in July 1966;two other drafts were elaborated in February 1968 and February1969.As a result of the meeting held in Washington in 1970,a final draft was submitted to the NationalCommittees for approval under the Six Months Rule in October 1970.An amendment was submitted tothe National Committees for approval under the Two Months Procedure in January 1972.The following countries voted explicitly in favour of publication:AustraliaNetherlandsAustriaNorwayBelgiumPoland*CanadaPortugalCzechoslovakiaRomaniaDenmarkSouth AfricaFinlandSwedenFranceSwitzerlandGermanyTurkeyHungaryUnion of Soviet Socialist RepublicsIsraelUnited KingdomItalyUnited States of AmericaJapanYugoslavia*With the exception of the limit figures for rectilinear speed,appearing at the end of Clause 4.2,deemed to be too low.7-CONTROL SWITCHES(LOW-VOLTAGE SWITCHING DEVICESFOR CONTROL AND AUXILIARY CIRCUITS,INCLUDING CONTACTOR RELAYS)Part 2:Special requirements for specific types of control switchesSECTION ONE:PUSH-BUTTONS AND RELATED CONTROL SWITCHES1.General1.1ScopeThis Recommendation applies to push-buttons and related control switches such as foot-switches,rotary switches,etc.,using contact elements similar to those of push-buttons.1.2ObjectThis Recommendation gives additional requirements,not found in IEC Publication 337-1,Control Switches,Part 1:General Requirements,applicable to push-buttons and related controlswitches,together with definitions and terms useful in stating desired properties of design orperformance.2.DefinitionsFor the purpose of this Recommendation,the following definitions shall apply.The mostimportant terms have been explicitly defined,while for the more obvious terms,the definitionhas been implied through the wording of the text in which they appear.2.1Basic definitions and classification2.1.1Push-buttonA control switch having an actuator intended to be operated by force exerted by a part of thehuman body,usually the finger or palm of the hand,and having stored energy(spring)return.2.1.2 Pull-buttonA control switch having an actuator intended to be operated by manual pull,and having storedenergy(spring)return.2.1.3 Push-pull buttonA control switch having an actuator intended to be operated by manual push and returnedto its initial position by manual pull,or vice versa.Note.-There are also push-pushor push-turnbuttons.2.1.4 Rotary switch(e.g.selector switch)A control switch having an actuator intended to be operated by manual rotation.Notes 1.-A rotary switch may have more than two positions;it may or may not have a spring return.2.-The rotary switches referred to above are those forming an integral part of a range of push-buttons.92.1.5Joy-stickA control switch having an actuator consisting of a pin or stick projecting essentially at aright angle from the panel or enclosure when in one of its positions and intended to be operatedby angular displacement.Notes 1.-A joy-stick may have more than two positions associated with different directions of the displacementof the stick and operating the contact elements differently;such a joy-stick is referred to as a joy-stickselector.A joy-stick which operates all contact elements alike for whatever the direction of the displa-cement is referred to as a wobble-stick.2.-The pin or stick may or may not have a spring return.2.1.6 Foot-switch(pedal)A control switch having an actuator intended to be operated by force exerted by a foot.2.2Definitions concerning operation2.2.1Latched push-buttonA push-button with spring return,but which remains in the actuated position until a latch isreleased by a separate action.Notes 1.-The latching may be released by subsequent actuation(such as pushing,turning,etc.)of the same orof an adjacent push-button or by the action of an electro-magnet,etc.2.-A push-button,the release of which is obtained by actuation of an adjacent button,is referred toas a maintained contact push-button.2.2.2 Locked push-buttonA push-button which may be secured in one or more of its positions by a separate action.Nore.-The locking may be obtained by turning the button,by turning a key,by operating a lever,etc.2.2.3Key-operated push-buttonA push-button which can only be operated as long as a key remains inserted.Note.-Key withdrawal may be provided at any position.2.2.4 Time-delay push-buttonA push-button the contacts of which return to the initial position only after a pre-determinedinterval of time following the release of the actuating force.2.2.5 Delayed action push-buttonA push-button in which the switching operation does not occur until after the force on thebutton has been maintained for a pre-determined interval of time.2.2.6 Illuminated push-buttonA push-button incorporating a signalling lamp in the button.2.3Definitions concerning the appearance of actuators2.3.1 ButtonThe external end of the actuator of a push-button,to which the actuating force is applied.2.3.2 Long buttonA button which protrudes in both its initial and operated positions.