Transcription of Electromechanical Safety Switch Overview
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Electromechanical Safety Switch Overview
Industrial Safety Products 179 StandardsIEC 60947-1 explains the general rules relating to Low voltageswitchgear and controlgear. The purpose of this standard is toharmonize as much as possible the product performance andtest requirements for equipment where the rated voltage doesnot exceed 1000 Vac or 1500 60947-5-1 is part 5 of the general rules which relates toControl-circuit devices and switching elements where ratedvoltage does not exceed 1000 Vac or 600 Vdc. Also within thispart there is a section which considers Special RequirementsFor Control Switches With Positive Opening Operation. Anycontrol Switch which has this positive opening operation andconforms to these special requirements will be marked on theoutside of the product with this symbol: Positive Opening OperationAll the switches presented in this catalog feature positive open-ing contacts on the Normally Closed Circuits (see Notes).
180 • Industrial Safety Products • Proper application of electromechanical switches For electromechanical switches with pushrod actuators, the actuating force should be applied as
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