Constituted of MCU in the control core, this series , by accurately sampling the signal of output voltage Uo and load current Io, A/D conversion, via breakover combination via thyristor to change the polarity of ΔU so as torealize compensation of voltage Ui and keeping output voltage Uo steady.

• Positive compensation: While Ui lower than rated value, TC secondary voltage ΔU plus Ui: Uo=Ui+ΔU（=220V）. The change of ΔU value via the change of autotransformer’s taps ;
• Negative compensation: While Ui higher than rated value, TC secondary voltage ΔU minus Ui: Uo=Ui-ΔU（=220V）. The change of ΔU value via the change of autotransformer’s taps;
• Zero compensation: While input voltage equals rated value, TC primary voltage via short-circuit of AC electric switch（ΔU=0）,all theAC electric switches of taps of autotransformer TA stop working. Ui=Uo.Cooling methods: AIR-COOLED, Isolation Transformer is option as per required.

△ Technical Parameters

△ Application

Mainly apply to mobile substation and/or telecommunication substation;