Household adjusting autotransformer `` ARB-250 '' (Lotos-1).Power supplies. Rectifiers, stabilizers, autotransformers, transient transformers, etc.Regulating autotransformersHousehold adjusting autotransformer "ARB-250" (Lotos-1) has been produced since 1981. It is an upgrade of the previous model "ARB-250" (Lotus). The modernization was reduced to replacing the dial voltmeter with a cathode one. Due to the impossibility of its operation at low voltages, the autotransformer is designed to manually maintain the output voltage of only 220 volts, when the input voltage changes from 150 to 250 volts. Load power no more than 250 W.