Ac vacuum contactor is a kind of automatic control electric apparatus.
Ac vacuum contactor is mainly used for frequently connecting or disconnecting AC and DC circuits.
It has great control and can be operated remotely.It can cooperate with relays to realize timing operation, interlock control, various quantitative control, voltage loss
and undervoltage protection.It is widely used in automatic control circuit.Its main control object is the motor, but also can be used to control other electrical loads, such as
electric heaters, lighting, welding machines, capacitor Banks, etc.
Vacuum contactor is mainly composed of vacuum arc extinguishing chamber and operating mechanism.
Vacuum arc extinguishing chamber has two functions: normal working current and reliable arc extinguishing when working current is frequently cut off.
However, overload current and short circuit current cannot be cut off.The operating mechanism consists of a holding coil with an iron core and an armature
that is energized to attract the armature and the contactor is closed.
The coil is cut off, the contactor is opened and the holding coil is usually available in both DC and AC forms.