A control system is designed to control an interrupter. The interrupter is started by a startup current to interrupt a main electric circuit. The startup current flows through an auxiliary electric circuit and has a current valve equal to or greater than a predetermined value. The control system includes a driving unit and a driven unit. The driving unit includes an intermediate electrical path to be connected to the main electric circuit. The driven unit is to be connected to the auxiliary electric circuit. When an abnormal current having a current value equal to or greater than a prescribed value flows through the intermediate electrical path, the driving unit uses, as a drive source for driving the driven unit, the abnormal current flowing through the intermediate electrical path. The driven unit supplies the auxiliary electric circuit with the startup current by being driven by the driving unit.

Disclosed is a switching device comprising a vacuum tube and an adjustable drive for opening and closing the contacts of the switching device. The switching device also comprises a sensor for detecting physical properties of the operating site of the switching device. The detected physical property adapts the adjustable drive for opening and closing the contacts to the operating site.

An interrupter system includes a first coil and an interrupter electrically connected to the first coil. The interrupter includes: a first terminal; a second terminal electrically connected to the first terminal; a third terminal electrically separated from the first terminal and the second terminal; a heat generating element electrically connected to the third terminal; and an explosive configured to be ignited by the heat generating element to produce a gas for interrupting an electrical connection between the first terminal and the second terminal. The first coil is electrically connected to the heat generating element via the third terminal. Moreover, the first coil is configured to, when an abnormal current flows between the first terminal and the second terminal, generate an electric power for igniting the explosive from the abnormal current.

A circuit breaker includes a housing, a fixed contact mounted in the housing, a pivot member arranged in the housing, and a pivoting arm moveably mounted in the housing. The pivoting arm includes a moveable contact. The pivoting arm is rotatable about and translatable relative to the pivot member to selectively engage and disengage the fixed and moveable contacts.

Disclosed is a switching device comprising a vacuum tube and an adjustable drive for opening, and closing the contacts of the switching device. The switching device also comprises a sensor for detecting physical properties of the operating site of the switching device. The detected physical property adapts the adjustable drive for opening and closing the contacts to the operating site.

The present invention relates to a structure of contacts for an air circuit breaker, in which a movable contact arm can be stably brought into contact with a fixed contact arm by changing an applying direction of an electromagnetic repulsive force generated between a movable contact and a fixed contact, and, to this end, the structure, which includes the fixed contact arm having the fixed contact, and the movable contact arm having the movable contact and rotatably installed to be brought into contact with or separated from the fixed contact arm, is configured such that the fixed contact and the movable contact have contact surfaces, respectively, disposed in an inclined manner, and a line commonly passing the contact surfaces of the fixed contact and the movable contact forms an acute angle with respect to a line passing through a center of a longitudinal axis of the movable contact arm.

A contact system in a low-voltage switch and a low-voltage switch are provided. The contact system comprises a bifurcated contact and a movable contact. The bifurcated contact has an upper bifurcated end and a lower bifurcated end. Electrical contact portions are respectively arranged on insides of the upper bifurcated end and the lower bifurcated end. Electrical contact portions are respectively arranged on upper and lower surfaces of an execution end of the movable contact corresponding to the electrical contact portions of the bifurcated contact. When the contact system is switched on and powered up, electrodynamic repulsion forces produced at the electrical contact portions of the bifurcated contact are offset, so that the contact system can stably maintain an ON state, thereby improving a short-time current withstand capability of a low-voltage switch using the contact system. (FIG. 1)

Provided is a switch that can reliably bring contacts into contact with each other with a small load, and can be prevented from malfunctioning. A switch is provided with a plunger, a lower torsion spring in which a biasing direction changes according to the movement of the plunger. The lower torsion spring biases the plunger in an opposite direction to a returning direction when the plunger is in the operation position, and biases the plunger in a direction different from the opposite direction to the returning direction when the plunger is in the reference position.

The present invention relates to a structure of contacts for an air circuit breaker, in which a movable contact arm can be stably brought into contact with a fixed contact arm by changing an applying direction of an electromagnetic repulsive force generated between a movable contact and a fixed contact, and, to this end, the structure, which includes the fixed contact arm having the fixed contact, and the movable contact arm having the movable contact and rotatably installed to be brought into contact with or separated from the fixed contact arm, is configured such that the fixed contact and the movable contact have contact surfaces, respectively, disposed in an inclined manner, and a line commonly passing the contact surfaces of the fixed contact and the movable contact forms an acute angle with respect to a line passing through a center of a longitudinal axis of the movable contact arm.

Provided is a switch that can reliably bring contacts into contact with each other with a small load, and can be prevented from malfunctioning. A switch is provided with a plunger, a lower torsion spring in which a biasing direction changes according to the movement of the plunger. The lower torsion spring biases the plunger in an opposite direction to a returning direction when the plunger is in the operation position, and biases the plunger in a direction different from the opposite direction to the returning direction when the plunger is in the reference position.