Commonly Asked Questions About Vacuum Contactors
What is a vacuum contactor?
A vacuum contactor is a sealed environment where electrical contacts can make or break a connection between a power source and load inside a vacuum bottle. The vacuum provides a safe, clean environment where the arc can be contained and contaminants avoided.
What is the main function of a vacuum contactor?
The main function of a vacuum contactor is simply to make and break the connection between the power source and the load. One side of contactor is fixed and the other is movable. Once energized, the generated electromagnetic force pulls the movable contact toward the stationary contact and the spring pulls the contactors apart once de-energized. In a vacuum contactor, this process is contained within a vacuum bottle, which can contain the arc and keep contaminants outside.
What is the difference between a vacuum contactor and a vacuum circuit breaker?
Compared to vacuum circuit breakers, vacuum contactors are smaller in size and safer for higher voltages above 600Vs. Vacuum contactors offer lower current chopping and are well suited for applications with frequent switching, generally offering mechanical life of over 3 million operations.