2-channel voltage relays

 

— the presence of two separate connection channels in the device means that it can be used to protect two separate network segments. In this case, the channels, usually, are divided according to the direction of protection — for example, one provides protection against voltage failures, the other — from violations of the network frequency. Such devices are designed for cases where network segments differ markedly in terms of load characteristics — for example, one segment feeds relatively unpretentious equipment, the second — sensitive electronics.