DC contactor is an automatic electromagnetic switch,which is suitable for frequent connecting and disconnecting DC main circuits and large -capacity control circuits.
①When the contactor coil is powered on, the coil current generates a magnetic field.
Generally electromagnetic DC contactors are divided into two types: hermetically sealed type(epoxy sealed and ceramic sealed) and open type (Soviet style and British style).
What is the difference between epoxy sealed and ceramic sealed contactor?
The common failure mode : contact burn (overheating) and contact melting welding (adhesion).
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