BS EN 60947-4-3:2000 PDF

Scope: This part of IEC 60947 applies to a.c. semiconductor non-motor load controllers and contactors intended for performing electrical operations by changing the state of a.c. electric circuits between the ON-stated and the OFF-state. Typical applications are given in table 2. As contrllers, they may be used to reduce the amplitude of the r.m.s. a.c. voltage on the load terminals from that of the applied voltage - either continuouslu ro for a specified period of time. The half-wave period of the a.c. wave form remains unchanged form that of the applied voltage. They may include a series mechanical switching device and are intended to be connected to circuits, the rated voltage of which does not exceed 1000 V a.c.

BS EN 60947-4-3:2000 history

2014 BS EN 60947-4-3:2014 Low-voltage switchgear and controlgear. Contactors and motor-starters. AC semiconductor controllers and contactors for non-motor loads
2000 BS EN 60947-4-3:2000+A2:2011 Low-voltage switchgear and controlgear. Contactors and motor-starters. AC semiconductor controllers and contactors for non-motor loads
2000 BS EN 60947-4-3:2000 Low-voltage switchgear and controlgear - Contactors and motor-starters - AC semiconductor controllers and contactors for non-motor loads