IEC 60947-4-3:2011 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 the ON-state and the OFF-state. Typical applications are given in table 2.
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 mechanical switching device and are intended to be connected to
circuits, the rated voltage of which does not exceed 1 000 V a.c.
This standard characterizes controllers and contactors for use with or without bypass
switching devices.
The semiconductor controllers and contactors dealt with in this standard are not normally
intended to interrupt short-circuit currents. Therefore, suitable short-circuit protection (see
8.2.5) 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.
This standard does not apply to
− operation of a.c. and d.c. motors;
− low-voltage a.c. semiconductor motor controllers and starters covered by IEC 60947-4-2;
− electronic a.c. power controllers covered by IEC 60146;
− all-or-nothing solid-state relays.
Contactors and control-circuit devices used in semiconductor controllers and contactors
should comply with the requirements of their relevant product standard. Where mechanical
switching devices are used, they should meet the requirements of their own IEC product
standard and the additional requirements of this standard.
The object of this standard is to state
a) the characteristics of semiconductor controllers and contactors and associated equipment;
b) the conditions with which semiconductor controllers and contactors should comply with
reference to
− their operation and behaviour;
− their dielectric properties;
− the degrees of protection provided by their enclosures, where applicable;
− their construction;
c) the tests intended for confirming that these conditions have been met, and the methods to
be adopted for these tests;
d) the information to be given with the equipment or in the manufacturer's literature.
IEC 60947-4-3:2011 Referenced Document
IEC 60410:1973 Sampling plans and procedures for inspection by attributes
IEC 60439-1:1999 Low-voltage switchgear and controlgear assemblies - Part 1: Type-tested and partially type-tested assemblies
IEC 60664 Insulation coordination for equipment within low-voltage systems - ALL PARTS*， 2011-10-31 Update
IEC 60947-1:2007 Low-voltage switchgear and controlgear - Part 1: General rules
IEC 60947-4-2:1999 Low-Voltage Switchgear and Controlgear - Part 4-2: Contactors and Motor-Starters - AC Semiconductor Motor Controllers and Starters (Edition 2.0; Amendment 1: 10-2001; Corrigendum 1: March 2002)
IEC 61000-3-2:2005 Electromagnetic compatibility (EMC) - Part 3-2: Limits - Limits for harmonic current emissions (equipment input current 16 A per phase)
IEC 61000-4-11:2004 Electromagnetic compatibility (EMC) - Part 4-11: Testing and measurement techniques - Voltage dips, short interruptions and voltage variations immunity tests
IEC 61000-4-2:2008 Electromagnetic compatibility (EMC) - Part 4-2: Testing and measuring techniques - Electrostatic discharge immunity test
IEC 61000-4-3:2006 Electromagnetic compatibility (EMC) - Part 4-3: Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-4:2004 Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement techniques - Electrical fast transient/burst immunity test
IEC 61000-4-5:2005 Electromagnetic compatibility (EMC) - Part 4-5: Testing and measurement techniques - Surge immunity test
IEC 61000-4-6:2008 Electromagnetic compatibility (EMC) - Part 4-6: Testing and measurement techniques - Immunity to conducted disturbances, induced by radio-frequency fields
IEC 60947-4-3:2011 history
2020IEC 60947-4-3:2020 Low-voltage switchgear and controlgear - Part 4-3: Contactors and motor-starters - Semiconductor controllers and semiconductor contactors for non-motor loads
2014IEC 60947-4-3:2014 Low-voltage switchgear and controlgear - Part 4-3: Contactors and motor-starters - AC semiconductor controllers and contactors for non-motor loads
1970IEC 60947-4-3:1999/AMD2:2011 Amendment 2 - Low-voltage switchgear and controlgear - Part 4-3: Contactors and motor-starters - AC semiconductor controllers and contactors for non-motor loads
2011IEC 60947-4-3:2011 Low-voltage switchgear and controlgear. Part 4-3: Contactors and motor-starters.AC semiconductor controllers and contactors for non-motor loads
2007IEC 60947-4-3:2007 Low-voltage switchgear and controlgear - Part 4-3: Contactors and motor-starters - AC semiconductor controllers and contactors for non-motor loads
1970IEC 60947-4-3:1999/AMD1:2006 Amendment 1 - Low-voltage switchgear and controlgear - Part 4-3: Contactors and motor-starters - AC semiconductor controllers and contactors for non-motor loads
1970IEC 60947-4-3:1999/COR1:2000 Corrigendum 1 - Low-voltage switchgear and controlgear - Part 4-3: Contactors and motor-starters - AC semiconductor controllers and contactors for non-motor loads
2000IEC 60947-4-3/COR:2000 Low-Voltage Switchgear and Controlgear Part 4-3: Contactors and Motor-Starters - AC Semiconductor Controllers and Contactors for Non-Motor Loads (Edition 1.0)
1999IEC 60947-4-3:1999 Low-voltage switchgear and controlgear - Part 4-3: Contactors and motor-starters - AC semiconductor controllers and contactors for non-motor loads