What do AC-3 and AC-4 of AC contactors mean ?
Examples of Category Code and Typical Use
AC-1 contactor is used to control inductionless or slightly inductive load and resistance furnace.
AC-2 contactor is used to control starting and breaking of winding induction motor.
AC-3 contactor is used to control the starting and running of cage induction motor.
Class AC-4 contactors are used to control the starting, reverse braking, reverse operation and point movement of cage induction motors.
AC-5a contactor is used to control the on-off of discharge lamp.
AC-5b contactor is used to control the on-off of incandescent lamp
AC-6a contactor is used to control the on-off of transformer
AC-6b contactor is used to control the on-off of capacitor banks.
AC-7a contactor is used to control low inductive load of household appliances and similar uses.
AC-7b contactor is used to control the load of household motor
AC-8a contactor is used to control motor in sealed refrigeration compressor with manual reset overload release.
AC-8b contactor is used to control motor in sealed refrigeration compressor with automatic reset overload release.