IEC 60947 – Low voltage switchgear and controlgear

IEC 60947 the Standard for Low Voltage Switchgear and Controlgear - ACB, MCCB, SDF, MCB, Contactor, Relay, Transfer Switch, Arc Quenching Devices.
IEC StandardDescription
IEC60947-1General rules for Low-voltage switchgear and controlgear
IEC60947-2Circuit Breakers
IEC60947-3Switches, disconnectors, switch disconnectors and fuse combination units
IEC60947-4Contactors and motor-starters

1-Electromechanical contactors and motor-starters

2-AC semiconductor motor controllers and starters

3-AC semiconductor controllers and contactors for non-motor loads
IEC60947-5Control circuit devices and switching elements

1-Electromechanical control circuit devices

2-Proximity switches

3-Requirements for proximity devices with defined behaviour under fault conditions (PDDB)

4-Method of assessing the performance of low-energy contacts – Special tests

5-Electrical emergency stop device with mechanical latching function

6-DC interface for proximity sensors and switching amplifiers (NAMUR)

7-Requirements for proximity devices with analogue output

8-Three-position enabling switches

9-Flow rate switches
IEC60947-6Multiple functionequipment

1- Transfer switching equipment

2-Control and protective switching devices
IEC60947-7Ancillary equipment:

1-Terminal blocks for copper conductors

2-Protective conductor terminal blocks for copper conductors

3-Safety requirements for fuse terminal blocks

4-PCB terminal blocks for copper conductors
IEC60947-8Control units for built-in thermal protection (PTC) for rotating electrical machines
IEC60947-9Active arc-fault mitigation systems – Arc quenching devices
LV Switchgear IEC60947
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