Electrical contacts are unreliable elements of an electrical circuit, because the electric arc that occurs between them when opening gradually destroys and...

Phase-sensitive protection that shuts down a three-phase motor in the event of a large voltage imbalance or phase failure. Phase sensitive protection devices...

Electromagnetic starters PML series are designed for remote starting by direct connection to the mains, stopping and reversing of three-phase asynchronous...

The load priority relay (or load control relay) serves as a means of automatically tripping non-preemptive loads...