The invention discloses a short-circuit detection device and method aiming at a
magnetic flux constraint type current-limiting switch. The short-circuit detection device comprises a
voltage detectioncircuit and a current detection circuit, wherein when a short-circuit fault occurs in the circuit, induced voltages generated at the two ends of an
inductance coil are suddenly changed; the
voltage detection circuit is connected in parallel with two ends of the
inductance coil and is used for detecting voltages at two ends of the
inductance coil; the
voltage detection circuit carries out voltage stabilization and
voltage reduction processing on the detected voltages at the two ends of the inductance coil, judges whether the voltage value after voltage stabilization and
voltage reduction processing exceeds a preset voltage threshold value or not, generates a short-circuit
alarm signal if the voltage value exceeds the preset voltage threshold value, and starts the
magnetic flux constraint type
current limiting switch to carry out
current limiting; the current detection circuit is used for detecting the current of a circuit where the
magnetic flux constraint type current-limiting switch is located, when the current exceeds a preset
current threshold value, it is judged that the circuit generates a short-circuit fault, and the magnetic flux constraint type current-limiting switch is started for
current limiting. The short-circuit fault can be rapidly and effectively detected.