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The autotransformer of the transitional household APB-630 (Dnipro) has been produced since 1975. APB is designed to match the input voltages of electrical devices with a capacity of up to 630 watts with the electrical network. If the network has 127 volts, then the output of the autotransformer is 220 volts, or vice versa, 220 - 127 volts.