DANSK DSF/PREN IEC 60947-4-3 PDF

This document applies to semiconductor controllers and semiconductor contactors for non- motor load intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V AC. It covers their use: – for operations of changing the state of AC electric circuits between the ON-state and the OFF-state; – with or without bypass switching devices; – as controller, for reducing the amplitude of the RMS AC voltage. This document does not apply to: – electromechanical contactors (see IEC 60947-4-1); – short-circuit protective device associated with semiconductor controllers and semiconductor contactors (see IEC 60947-4-1 (MPSD), IEC 60947-2 and IEC 60947-3); – semiconductor motor controller or soft-starter equipment (see IEC 60947-4-2); – semiconductor converters (see IEC 60146 series); – all-or-nothing solid-state relays (see IEC 62314); – use of the product within explosive atmospheres (see IEC 60079 series); – software and firmware requirements (see IEC TR 632012); – cyber security aspects (see IEC 632083).