A power-supply control apparatus, comprising: a rectifying circuit having a switching element, which receives an AC current from an AC power supply via a reactor and converts into a rectified current; a smoothing output circuit which receives the rectified current outputted from the rectifying circuit, and forms an output to a DC load; an input voltage detection part which detects an instantaneous voltage of an input voltage from the AC power supply, and which forms input voltage detection information including polarity information and absolute value information about the input voltage on the basis of the detected instantaneous voltage, and outputs the input voltage detection information; an input current detection part which has a current transformer that detects an input current from the AC power supply, and which outputs information indicating an absolute value of a detection voltage proportional to the input current detected by the current transformer; a rectified current detection part which detects an instantaneous value of the rectified current to be inputted to the smoothing output circuit from the rectifying circuit, and which outputs rectified current detection information; an output voltage detection part which detects a terminal voltage of the smoothing output circuit connected to the output of the rectifying circuit, and which outputs output voltage detection information; a control circuit to which the input voltage detection information, the input current detection information, the rectified current detection information, and the output voltage detection information are inputted, and which outputs a driving command signal which is for performing ON/OFF operation of the switching element so that the rectified current outputted from the rectifying circuit becomes a sine-wave rectified waveform having the same phase as the input voltage; and a breaking circuit which interrupts the driving command signal to be inputted to the rectifying circuit from the control circuit on the basis of the input current detection information, the rectified current detection information, and the output voltage detection information, the breaking circuit interrupting the driving command signal to be inputted to the rectifying circuit from the control circuit when the input current detection information exceeding a previously determined abnormal input current threshold. a rectifying circuit having a switching element, which receives an AC current from an AC power supply via a reactor and converts into a rectified current; a smoothing output circuit which receives the rectified current outputted from the rectifying circuit, and forms an output to a DC load; an input voltage detection part which detects an instantaneous voltage of an input voltage from the AC power supply, and which forms input voltage detection information including polarity information and absolute value information about the input voltage on the basis of the detected instantaneous voltage, and outputs the input voltage detection information; an input current detection part which has a current transformer that detects an input current from the AC power supply, and which outputs information indicating an absolute value of a detection voltage proportional to the input current detected by the current transformer; a rectified current detection part which detects an instantaneous value of the rectified current to be inputted to the smoothing output circuit from the rectifying circuit, and which outputs rectified current detection information; an output voltage detection part which detects a terminal voltage of the smoothing output circuit connected to the output of the rectifying circuit, and which outputs output voltage detection information; a control circuit to which the input voltage detection information, the input current detection information, the rectified current detection information, and the output voltage detection information are inputted, and which outputs a driving command signal which is for performing ON/OFF operation of the switching element so that the rectified current outputted from the rectifying circuit becomes a sine-wave rectified waveform having the same phase as the input voltage; and a breaking circuit which interrupts the driving command signal to be inputted to the rectifying circuit from the control circuit on the basis of the input current detection information, the rectified current detection information, and the output voltage detection information, the breaking circuit interrupting the driving command signal to be inputted to the rectifying circuit from the control circuit when the input current detection information exceeding a previously determined abnormal input current threshold.