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IEC 60947-4-3

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

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Organization: IEC
Publication Date: 1 July 2020
Status: active
Page Count: 92
ICS Code (Low voltage switchgear and controlgear): 29.130.20
ICS Code (Printed circuits and boards): 31.180
scope:

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 (all parts));

- solid-state relays (see IEC 62314);

- use of the product within explosive atmospheres (see IEC 60079 (all parts));

- software and firmware requirements (see IEC TR 63201);

- cyber security aspects (see IEC TS 63208).

Contactors and control-circuit devices used in semiconductor controllers and contactors are considered compliant with the requirements of their relevant product standard. Where mechanical switching devices are used, they are considered meeting the requirements of their own IEC product standard and the additional requirements of this document.

The object of this document is to state as follows:

- the characteristics of semiconductor controllers and semiconductor contactors;

- the conditions with which semiconductor controllers and semiconductor contactors comply with reference to:

a) their operation and behaviour in normal and abnormal operating conditions including overcurrent operating conditions;

b) their dielectric properties;

c) the degrees of protection provided by their enclosures, where applicable;

d) their construction including safety measures against electric shock, fire hazard and mechanical hazard;

- the tests intended for confirming that these conditions have been met, and the methods to be adopted for these tests;

- the information to be given with the equipment or in the manufacturer's literature.

Document History

IEC 60947-4-3
July 1, 2020
Low-voltage switchgear and controlgear – Part 4-3: Contactors and motor-starters – Semiconductor controllers and semiconductor contactors for non-motor loads
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...
May 1, 2014
Low-voltage switchgear and controlgear – Part 4-3: Contactors and motor-starters – AC semiconductor controllers and contactors for non-motor loads
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...
July 1, 2011
Low-voltage switchgear and controlgear – Part 4-3: Contactors and motor-starters – AC semiconductor controllers and contactors for non-motor loads
Scope and object 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...
March 1, 2011
AMENDMENT 2 Low-voltage switchgear and controlgear – Part 4-3: Contactors and motor-starters – AC semiconductor controllers and contactors for non-motor loads
 Scope and object 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...
January 1, 2007
Low-Voltage Switchgear and Controlgear Part 4-3: Contactors and Motor-Starters - AC Semiconductor Controllers and Contactors for Non-Motor Loads
 Scope and object 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...
October 1, 2006
Amendment 1 Low-voltage switchgear and controlgear – Part 4-3: Contactors and motor-starters – AC semiconductor controllers and contactors for non-motor loads
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...
May 1, 2000
Low-Voltage Switchgear and Controlgear Part 4-3: Contactors and Motor-Starters - AC Semiconductor Controllers and Contactors for Non-Motor Loads
 Scope and object 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...
September 1, 1999
Low-Voltage Switchgear and Controlgear Part 4-3: Contactors and Motor-Starters - AC Semiconductor Controllers and Contactors for Non-Motor Loads
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...

References

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