Patent ID: 8335060
Filing Date: 2012-12-18
Classification: H01H,H02H

Abstract:
1. A hybrid fault current limiter comprising: a switching unit configured to detach a moving contact located on a cable and transmit a trip signal if a fault current flows in an electric power system; a semiconductor switching unit connected in series with the switching unit and configured to be turned off when the trip signal is transmitted; a circuit breaking unit connected in parallel to the series connection of the switching unit and the semiconductor switching unit and configured to limit the fault current from the switching unit and the semiconductor switching unit; and an accident sensor configured to generate and transmit an open trip signal when the fault current flows, wherein the switching unit comprises: a moving coil configured to generate a magnetic field according to the switching device being turned on; an electromagnetic repulsive plate configured to move far from the moving coil according to the magnetic field; and a controller configured to generate and transmit the trip signal to the semiconductor switching unit when the moving contact is detached.