This part of IEC 60947 applies to the types of equipment listed in 1.1.1 and 1.1.2 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 dealt with in this standard are not normally designed to interrupt
short-circuit currents. Therefore, suitable short-circuit protection (see 9.3.4) forms part of the
installation but not necessarily of the contactor or the starter.
In this context, this 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, e.g. combination starters or protected starters are
rated as units.
For circuit-breakers and fuse-combination units used as short-circuit protective devices in
combination starters and in protected starters, the requirements of IEC 60947-2 and
IEC 60947-3 respectively apply.
Equipment covered by this standard is as follows.
BS EN 60947-4-1:2010 history
2010BS EN 60947-4-1:2010+A1:2012 Low-voltage switchgear and controlgear. Contactors and motor-starters. Electromechanical contactors and motor-starters
2010BS EN 60947-4-1:2010 Low-voltage switchgear and controlgear - Contactors and motor-starters - Electromechanical contactors and motor-starters
2001BS EN 60947-4-1:2001 Low-voltage switchgear and controlgear - Contactors and motor-starters - Electromechanical contactors and motor-starters