A high voltage in-line air break disconnect switch suspended by an electric power line conductor wherein the switch includes a rotating switch blade that is operated by a communication system controlled motor that may include a switch mounted radio which is controlled by another radio located in a hand-held portable controller that is battery powered to provide a secure way to open and close a switch without traditional padlockable manual operators that are vulnerable to terrorist attacks. The communication system controlled motorized in-line air break disconnect switch is battery operated and solar charged.

A high voltage in-line air break disconnect switch suspended by an electric power line conductor wherein the switch includes a rotating switch blade that is operated by a communication system controlled motor that may include a switch mounted radio which is controlled by another radio located in a hand-held portable controller that is battery powered to provide a secure way to open and close a switch without traditional padlockable manual operators that are vulnerable to terrorist attacks. The communication system controlled motorized in-line air break disconnect switch is battery operated and solar charged.

Exemplary embodiments include a device for connecting and disconnecting a high-voltage circuit. The device includes a first main terminal and a second main terminal, a first intermediate terminal connected to the first main terminal by a first impedance, a first arc quenching chamber arranged between the first intermediate terminal and the first main terminal, a second intermediate terminal connected to the first intermediate terminal by a second impedance, the first intermediate terminal being connected in series between the first main terminal and the second intermediate terminal, a second arc quenching chamber arranged between the first intermediate terminal and the second intermediate terminal, and a mobile armature making it possible to connect, in the disconnection direction, the second main terminal on the one hand and, on the other hand and in succession, the first main terminal, the first intermediate terminal and the second intermediate terminal.

Exemplary embodiments include a device for connecting and disconnecting a high-voltage circuit. The device includes a first main terminal and a second main terminal, a first intermediate terminal connected to the first main terminal by a first impedance, a first arc quenching chamber arranged between the first intermediate terminal and the first main terminal, a second intermediate terminal connected to the first intermediate terminal by a second impedance, the first intermediate terminal being connected in series between the first main terminal and the second intermediate terminal, a second arc quenching chamber arranged between the first intermediate terminal and the second intermediate terminal, and a mobile armature making it possible to connect, in the disconnection direction, the second main terminal on the one hand and, on the other hand and in succession, the first main terminal, the first intermediate terminal and the second intermediate terminal.

A switching device includes: a first contact; a second contact; and a fault detection circuit. The second contact includes a fixed contactor and a movable contactor. When the second contact is energized due to an operation of opening the first contact, the movable contact is separated from the fixed contact by an electromagnetic force generated by a flow of currents in opposite directions through the pair of current-carrying electrodes, and a discharge switch is formed between the movable contact and the fixed contact that are separated. The switching device further includes: a first arc runner electrically connected to the fixed contactor for driving, by an electromagnetic force, arc discharge that occurs when the second contact is opened; and a second arc runner electrically connected to the movable contactor.

A switching device includes: a first contact; a second contact; and a fault detection circuit. The second contact includes a fixed contactor and a movable contactor. When the second contact is energized due to an operation of opening the first contact, the movable contact is separated from the fixed contact by an electromagnetic force generated by a flow of currents in opposite directions through the pair of current-carrying electrodes, and a discharge switch is formed between the movable contact and the fixed contact that are separated. The switching device further includes: a first arc runner electrically connected to the fixed contactor for driving, by an electromagnetic force, arc discharge that occurs when the second contact is opened; and a second arc runner electrically connected to the movable contactor.

Provided is a relay switch device including a relay housing, a first upper fixing terminal and a second upper fixing terminal arranged side by side over an inside and an outside of the relay housing, a first lower fixing terminal electrically connected to the first upper fixing terminal and arranged under the first upper fixing terminal to be apart a predetermined distance from the first upper fixing terminal, and a second lower fixing terminal electrically connected to the second upper fixing terminal and arranged under the second upper fixing terminal to be apart a predetermined distance from the second upper fixing terminal, and a circuit mode switch module provided to selectively contact the first and second upper fixing terminals or the first and second lower fixing terminals by moving a predetermined distance.

A commutating circuit for an electronic power converter has a first switching device, by which the electronic power converter can be electrically bridged, and a circuit part for limiting the size of the time-related voltage change of a voltage present on the first switching device. The circuit part limits the time-related voltage variation.

Disclosed is a supporting structure of a closing resistor unit for a circuit breaker which connects the closing resistor unit to the fixed portion through the first supporting plate and the second supporting plate to allow the closing resistor unit to move back and forth with respect to the fixed portion through the first supporting plate and to move up and down with respect to the fixed portion through the second supporting plate, whereby the closing resistor unit or its joints may be prevented from being damaged from impact.

Disclosed is a supporting structure of a closing resistor unit for a circuit breaker which connects the closing resistor unit to the fixed portion through the first supporting plate and the second supporting plate to allow the closing resistor unit to move back and forth with respect to the fixed portion through the first supporting plate and to move up and down with respect to the fixed portion through the second supporting plate, whereby the closing resistor unit or its joints may be prevented from being damaged from impact.