DKE German Commission for Electrical, Electronic & Information Technologies of DIN and VDE
DIN EN 60947-4-1
; VDE 0660-102:2014-02
Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters (IEC 60947-4-1:2009 + A1:2012); German version EN 60947-4-1:2010 + A1:2012
Niederspannungsschaltgeräte - Teil 4-1: Schütze und Motorstarter - Elektromechanische Schütze und Motorstarter (IEC 60947-4-1:2009 + A1:2012); Deutsche Fassung EN 60947-4-1:2010 + A1:2012
Overview
This part of IEC 60947 applies to AC and DC contactors, AC motor-starters, direct-on-line (full voltage) a.c. starters, reduced voltage a.c. starters, star-delta starters, two-step auto-transformer starters, and rheostatic rotor starters, whose main contacts are intended to be connected to circuits the rated voltage of which does not exceed 1 000 V a.c. or 1 500 V d.c. Starters and/or contactors according to this standard are not normally designed to interrupt short-circuit currents. Therefore, suitable short-circuit protection forms part of the installation but not necessarily of the contactor or the starter. In this context, the standard gives requirements for contactors associated with overload and/or short-circuit protective devices; starters associated with separate short-circuit protective devices and/or with separate short-circuit and integrated overload protective devices; contactors or starters combined, under specified conditions, with their own short-circuit protective devices. Such combinations, for example combination starters or protected starters are rated as units. The responsible committee is DKE/K 431 "Niederspannungsschaltgeräte und -kombinationen" ("Low voltage switchgear and controlgear") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.
