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Voltage stabilizer "SN-250" since 1956 produced Zaporozhye transformer plant. Voltage stabilizer "CH-250" is designed to supply a stabilized voltage of 220 volts of typical TVs, which power from 90 to 250 watts. Voltage stabilizer type "CH-250" operates from an AC mains with a frequency of 50 Hz 110, 127 or 220 volts. Voltage fluctuations at which an output voltage of 220 volts is provided for a 110-volt network from 90 to 120 volts, for a 127-volt network from 80 to 140 volts and for a 220-volt network from 140 to 240 volts.