One-phase control units ELFIStor 1F are intended for lossless control eletric power in power circuits of AC current. Applied mainly where the fluent control power required. The most common applications include power control electrical heating devices, such as electric stoves or heaters with high powers. 1F ELFIStor Units are suitable for regulating the heating elements with a large temperature coefficient of resistance or for   resistance heating premises by direct current passage. Another possible application is the control of electrochemical processes in electroplating, battery rooms and etc.. The main fields of application are the metallurgy, glass, ceramics, food, and construction of electric furnaces. The unit is intended for one-phase connection. Load cab be supplied both - from phase and lin-voltage. Load cane be connected to the output either directly or through separating or impedanc transformer.