Applies to contactors intended for closing and opening electric circuits, and, if combined with suitable relays, for protecting those circuits against operating overloads which may occur therein. Intended to state the characteristics of contactors; the conditions with which contactors shall comply with reference to their operation and behaviour and their dielectric properties; the tests intended for confirming that these conditions have been met and the methods to be adopted for these tests; the data to be marked on the apparatus.
Applicable to a.c. contactors and/or contactor-based motor-starters designed for indoor installation and operation at frequencies up to and including 60 Hz on systems having voltages above 1 000 V but not exceeding 12 000 V. Applicable only to three-pole contactors and starters for use in three-phase systems and single-pole contactors and starters for use in single-phase systems.
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