SR EN 60947-4-3:2001

Low-voltage switchgear and controlgear -- Part 4-3: Contactors and motor-starters - AC semiconductor controllers and contactors for non-motor loads

This part of EN 60947 applies to a.c. semiconductor non-motor load controllers and contactors intended for performing electrical opertions by changing the state of a.c. electric circuits between the ON-state and the OFF-state. As controllers, 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 continuously or for a specified period of time. The half-wave period of the a.c. wave form remains unchanged from that of the applied voltage. They may include a series mechanicall switching device and are intended to be connected to circuits, the rated voltage of which does not exceed 1000 V a.c. The semiconductor controllers and contactors dealt with in this standard are not normally intended to interrupt short-circuit currents. Therefore, suitable short-circuit protection should form part of the installation but not necessarily of the controller itself. In this context, this standard gives requirements for semiconductor controllers and contactors associated with separate short-circuit protective devices.

General information

Status : Withdrawn
Approval date : 11/28/2001
Publish date : 11/29/2001
Withdrawal date : 6/11/2017
Number of pages : 72
ICS : 29.130.20 Low voltage switchgear and controgear,31.180 Printed circuits and boards
Technical Committee : 9 - Low-voltage switchgear and controlgear

Relations with other standards:

Normative reference SR EN 61000-4-4:1999
Normative reference SR EN 60947-4-2:2001
Normative reference SR CEI 61000-2-1:1996
Normative reference SR EN 141:2002
Normative reference SR EN 60269-1:2001
Normative reference SR EN 60947-1:2001
Normative reference SR CEI 60050(161):1997
Normative reference SR EN 61000-4-3:1998
Replaced by SR EN 60947-4-3:2015
Amended by SR EN 60947-4-3:2001/A2:2012
Amended by SR EN 60947-4-3:2001/A1:2007