Abstract: An actuator for a high-speed switch is proposed. The actuator can include a frame having multiple mounting plates and columns. The mounting plates have parts installed thereon or movably supported thereby. The columns maintain the space between the mounting plates. A permanent magnet is installed on one of the mounting plates so as to face the second driving plate, and an elastic member is installed on the mounting plate that faces the mounting plate having the permanent magnet installed thereon, so as to provide force for the movement of the second driving plate.

Abstract: Provided is a high voltage DC circuit breaker that interrupts a fault current flowing through a high voltage DC transmission line with a vacuum circuit breaker and a gas circuit breaker connected in series. The circuit breaker includes: a vacuum circuit breaker installed on a DC transmission line and operating to interrupt a current in the DC transmission line when a fault occurs on either side of the DC transmission line; a gas circuit breaker connected in series with the vacuum interrupter; an LC circuit connected in parallel with the vacuum circuit breaker and including a capacitor and a reactor connected in series to induce LC resonance; a first bidirectional switching device connected in series with the LC circuit and switching a current flowing in any of two opposite directions; and a second bidirectional switching device connected in parallel with the LC circuit.

Abstract: The present invention relates to a vacuum interrupter for a circuit breaker capable of forming and releasing a short circuit by moving two movable electrodes in forward/backward directions, and a driving method therefor. The vacuum interrupter according to the present invention includes: a housing with a vacuum state therein; and first and second movable electrodes partially accommodated within the housing, and attached to first and second movable contacts at respective ends thereof, wherein the first and second movable electrodes are capable of moving in forward/backward directions, and the first and second movable contacts contact each other and separate from each other by the movement in forward/backward directions of the first and second electrodes.

Abstract: Provided is a circuit breaker for a DC current using a magnetic field, which generates a magnetic flux and extinguishes an arc current generated in a main switch. The circuit breaker includes a main switch installed in a DC line, a coil wound so as to generate a magnetic flux in a direction vertical to the direction of an arc current generated when the main switch is opened, a semiconductor switch for switching current application to the coil, a capacitor connected in series to the semiconductor switch, and a first diode for conducting the electric current of the DC line, supplied from one side of the main switch, to the capacitor, wherein the semiconductor switch is turned on, in case a fault occurs, so that the electric current is applied to the coil by the voltage charged in the capacitor.

Abstract: Provided is an actuator for a high-speed switch. The frame of the actuator is formed by a frame, and the frame consists of multiple mounting plates and columns. The mounting plates have parts installed thereon or movably supported thereby. The columns maintain the space between the mounting plates. A driving unit is installed so as to pass through a part of the mounting plates, and the driving unit is provided with a first driving plate and a second driving plate on a driving shaft. A first coil unit is provided on the mounting plate so as to face the first driving plate and generates the movement of the first driving plate at the time of an opening operation. A permanent magnet is installed on one of the mounting plates so as to face the second driving plate, and an elastic member is installed on the mounting plate that faces the mounting plate having the permanent magnet installed thereon, so as to provide force for the movement of the second driving plate.

Abstract: An electromagnetic repulsion actuator for a circuit breaker is provided. The actuator can include a housing; a first fixed electrode having therein an operating space open at both sides; a pair of movable electrodes capable of reciprocally moving and being electrically connected to the first fixed electrode; second fixed electrodes selectively contacting the pair of movable electrodes to be electrically connected thereto, thereby transferring power supplied from a first side to a second side; and actuating coils selectively moving the movable electrodes in a direction of being separated from the second fixed electrodes by generating electromagnetic force from induced current. In the present invention as above, the structure of a circuit breaker is simplified and moving speeds of the movable electrodes are increased since the movable electrodes move by using induced current generated by a close coil and open coils to perform an open operation.

Abstract: Provided is a high-voltage direct current (DC) circuit breaker which interrupts a fault current flowing in a power transmission or power distribution DC line when a fault occurs in the DC line. The high-voltage DC circuit breaker includes: a main switch, installed in the DC line, for interrupting a current in the DC line by being opened when a fault occurs in one side or the other side of the DC line; a nonlinear resistor, connected in parallel to the main switch, for consuming overvoltage; and an LC circuit connected in parallel to the main switch and comprising a capacitor and an inductor that are connected to each other in series to generate LC resonance.

Abstract: A high-voltage DC circuit breaker for breaking a current that flows in a DC line, including: a main switch, installed on the DC line, for breaking a current of the DC line by opening when a fault occurs on one side or a remaining side of the DC line; a nonlinear resistor connected in parallel with the main switch; an LC circuit that is connected in parallel with the main switch and includes a capacitor and a reactor, which are connected in series in order to generate LC resonance; a first bidirectional switching element, connected to the LC circuit in series, for switching a bidirectional current flow; and a second bidirectional switching element, connected in parallel with the LC circuit, for switching a current flow to induce LC resonance in both directions.

Abstract: The present invention relates to a vacuum interrupter for a circuit breaker capable of forming and releasing a short circuit by moving two movable electrodes in forward/backward directions, and a driving method therefor. The vacuum interrupter according to the present invention includes: a housing with a vacuum state therein; and first and second movable electrodes partially accommodated within the housing, and attached to first and second movable contacts at respective ends thereof, wherein the first and second movable electrodes are capable of moving in forward/backward directions, and the first and second movable contacts contact each other and separate from each other by the movement in forward/backward directions of the first and second electrodes.

Abstract: Provided is a high voltage DC circuit breaker that interrupts a fault current flowing through a high voltage DC transmission line with a vacuum circuit breaker and a gas circuit breaker connected in series. The circuit breaker includes: a vacuum circuit breaker installed on a DC transmission line and operating to interrupt a current in the DC transmission line when a fault occurs on either side of the DC transmission line; a gas circuit breaker connected in series with the vacuum interrupter; an LC circuit connected in parallel with the vacuum circuit breaker and including a capacitor and a reactor connected in series to induce LC resonance; a first bidirectional switching device connected in series with the LC circuit and switching a current flowing in any of two opposite directions; and a second bidirectional switching device connected in parallel with the LC circuit.

Abstract: An electromagnetic repulsion actuator for a circuit breaker is provided. The actuator can include a housing; a first fixed electrode having therein an operating space open at both sides; a pair of movable electrodes capable of reciprocally moving and being electrically connected to the first fixed electrode; second fixed electrodes selectively contacting the pair of movable electrodes to be electrically connected thereto, thereby transferring power supplied from a first side to a second side; and actuating coils selectively moving the movable electrodes in a direction of being separated from the second fixed electrodes by generating electromagnetic force from induced current. In the present invention as above, the structure of a circuit breaker is simplified and moving speeds of the movable electrodes are increased since the movable electrodes move by using induced current generated by a close coil and open coils to perform an open operation.

Abstract: The present invention relates to a high-voltage direct current (DC) circuit breaker which interrupts a fault current flowing in a power transmission or power distribution DC line when a fault occurs in the DC line.

Abstract: The present invention relates to a bidirectional direct current (DC) circuit breaker for interrupting a fault current flowing through a DC line for power transmission or distribution in case a fault occurs at one side of the DC line.

Abstract: The present invention relates to a direct current (DC) circuit breaker using a magnetic field, for generating a magnetic flux in a direction vertical to the direction of an arc current generated in a main switch so as to increase resistance to the arc current and for continuously supplying a circulating current from a DC line so as to further increase the magnetic flux and thus continuously increase the resistance to the arc current, thereby extinguishing an arc.

Abstract: A high-voltage DC circuit breaker for breaking a current that flows in a DC line, including: a main switch, installed on the DC line, for breaking a current of the DC line by opening when a fault occurs on one side or a remaining side of the DC line; a nonlinear resistor connected in parallel with the main switch; an LC circuit that is connected in parallel with the main switch and includes a capacitor and a reactor, which are connected in series in order to generate LC resonance; a first bidirectional switching element, connected to the LC circuit in series, for switching a bidirectional current flow; and a second bidirectional switching element, connected in parallel with the LC circuit, for switching a current flow to induce LC resonance in both directions.