Abstract: The present invention provides a branching unit, the height of which can be reduced, and a vehicular system. The branching unit includes a switch equipped with a fixed electrode and a movable electrode; a first bushing conductor which is connected either to the fixed electrode or to the movable electrode; and a second bushing conductor which is connected to the other of the fixed electrode and the movable electrode. A first T-shaped cable head is connected at one end to the first bushing conductor, a second T-shaped cable head is connected to a different end part of the first T-shaped cable head from the one end, a third T-shaped cable head is connected at one end to the second bushing conductor, the first T-shaped cable head and the second T-shaped cable head are respectively connected to different circuits, and surfaces of the respective T-shaped cable heads and the switch are at a ground potential.

Abstract: The present invention provides a branching unit, the height of which can be reduced, and a vehicular system. The branching unit includes a switch equipped with a fixed electrode and a movable electrode; a first bushing conductor which is connected either to the fixed electrode or to the movable electrode; and a second bushing conductor which is connected to the other of the fixed electrode and the movable electrode. A first T-shaped cable head is connected at one end to the first bushing conductor, a second T-shaped cable head is connected to a different end part of the first T-shaped cable head from the one end, a third T-shaped cable head is connected at one end to the second bushing conductor, the first T-shaped cable head and the second T-shaped cable head are respectively connected to different circuits, and surfaces of the respective T-shaped cable heads and the switch are at a ground potential.

Abstract: An object is to provide a switching unit or switching gear which enhances heat radiation performance and eliminates the need for an increase in unit size. In order to solve this problem the switching unit includes a switch and insulating resin located in a way to cover the periphery of the switch, in which the switch includes a fixed electrode, a movable electrode facing the fixed electrode and moving in an axial direction to contact or leave the fixed electrode, a bus side conductor connected to one of the electrodes and connected to a bus, and a load side conductor connected to the other electrode and connected to the load. The insulating resin has fins formed in a circumferential direction on the outer surface of the insulating resin and the distance between the periphery of the switch and the bottoms of the fins is almost constant in the circumferential direction.

Abstract: The invention has an object to provide an operating device or vacuum switch which permits reduction in the overall height of the operating device and improves installation convenience. In order to solve the above problem, an operating device according to the present invention is characterized by including an electromagnet 14 located in a case 10 and fixed to the case 10 through a fixing part, a capacitor 16 located at an end in the case 10, a control board 18 located opposite to the capacitor 16 across the electromagnet 14, an auxiliary contact 34 located above the capacitor 16, a movable part to move by a magnetic force generated from the electromagnet 14, and a power transmission section to operate in conjunction with movement of the movable part. The capacitor 16 and the auxiliary contact 34 are located at heights not exceeding the height of the fixing part for fixing the electromagnet 14.

Abstract: The invention has an object to provide an operating device or vacuum switch which permits reduction in the overall height of the operating device and improves installation convenience. In order to solve the above problem, an operating device according to the present invention is characterized by including an electromagnet 14 located in a case 10 and fixed to the case 10 through a fixing part, a capacitor 16 located at an end in the case 10, a control board 18 located opposite to the capacitor 16 across the electromagnet 14, an auxiliary contact 34 located above the capacitor 16, a movable part to move by a magnetic force generated from the electromagnet 14, and a power transmission section to operate in conjunction with movement of the movable part. The capacitor 16 and the auxiliary contact 34 are located at heights not exceeding the height of the fixing part for fixing the electromagnet 14.

Abstract: An actuator for a contactor comprises an electromagnet having a closing coil, a holding coil, fixed cores wound with the closing coil and the holding coil respectively, a movable core provided on one side of the fixed cores, and a yoke. A main contact movable member operates to perform closing or interrupting by attraction or release of the movable core with respect to the fixed core. The actuator has a trip spring, energy-stored during the closing, that performs the interrupting upon stopping energization to the holding coil and thereby releasing the stored-energy. The actuator has an auxiliary contact operating with the operation of the movable core and performing energization switching with respect to the closing coil and the holding coil. The trip spring is provided on one side of the electromagnet in a horizontal direction while the auxiliary contact is provided on the other side.

Abstract: An object is to provide a switching unit or switching gear which enhances heat radiation performance and eliminates the need for an increase in unit size. In order to solve this problem the switching unit includes a switch and insulating resin located in a way to cover the periphery of the switch, in which the switch includes a fixed electrode, a movable electrode facing the fixed electrode and moving in an axial direction to contact or leave the fixed electrode, a bus side conductor connected to one of the electrodes and connected to a bus, and a load side conductor connected to the other electrode and connected to the load. The insulating resin has fins formed in a circumferential direction on the outer surface of the insulating resin and the distance between the periphery of the switch and the bottoms of the fins is almost constant in the circumferential direction.

Abstract: The switchgear includes a vacuum circuit breaker that is disposed in a circuit breaker chamber compartmented by a grounded metal plate, a busbar that is disposed in a busbar chamber and connected to the vacuum circuit breaker through a conductor, a cable that is disposed in a cable chamber and connected at one end to a load side, and a grounding device that is operated by a grounding device actuator disposed in a grounding device actuator chamber, connected to the vacuum circuit breaker through a conductor, and connected to the other end of the cable. The busbar is formed by a solid-insulated busbar. The conductor connecting the vacuum circuit breaker to the busbar and the conductor connecting the vacuum circuit breaker to the grounding device are both formed by a solid-insulated conductor. The circuit breaker chamber and the grounding device have a sealed structure.

Abstract: An actuator for a contactor comprises an electromagnet having a closing coil, a holding coil, fixed cores wound with the closing coil and the holding coil respectively, a movable core provided on one side of the fixed cores, and a yoke. A main contact movable member operates to perform closing or interrupting by attraction or release of the movable core with respect to the fixed core. The actuator has a trip spring, energy-stored during the closing, that performs the interrupting upon stopping energization to the holding coil and thereby releasing the stored-energy. The actuator has an auxiliary contact operating with the operation of the movable core and performing energization switching with respect to the closing coil and the holding coil. The trip spring is provided on one side of the electromagnet in a horizontal direction while the auxiliary contact is provided on the other side.

Abstract: Provided an electrical contact is cheap, excellent workability and lasts the effect of chopping current reduction. An electrical contact comprising a Cu matrix, and compounds Cu and low melting point metal which are dispersed in the Cu matrix, wherein a vapor pressure of the low melting point metal is more than 105 Pa at 1000° C., the compound has stoichiometric ratio which is the value of the low melting metal/Cu is greater than 0.5, and a longitudinal direction of the compound is oriented at an angle of 90°±10° to the contact surfaces. The method of the electrical contact is stretching mixture the Cu matrix with the compounds at 70-85% while heating, using as a contact surfaces of the electrical contact.

Abstract: An air circuit breaker comprises: a make-and-break unit having a stator and a blade-shaped movable element rotatably supported with a support shaft; an electromagnetic operation unit having a fixed iron core, a movable iron core provided below the fixed iron core, a coil to produce an electromagnetic force, and a permanent magnet; a capacitor to store electric power to excite the coil; a control circuit board that controls a carrying direction of a current supplied from the capacitor to the coil in response to an input command or a breaking command to the make-and-break unit; and a servo mechanism provided above the electromagnetic operation unit and connected to the movable iron core, that transmits a driving force from the electromagnetic operation unit to the make-and-break unit.

Abstract: The switchgear includes a vacuum circuit breaker that is disposed in a circuit breaker chamber compartmented by a grounded metal plate, a busbar that is disposed in a busbar chamber and connected to the vacuum circuit breaker through a conductor, a cable that is disposed in a cable chamber and connected at one end to a load side, and a grounding device that is operated by a grounding device actuator disposed in a grounding device actuator chamber, connected to the vacuum circuit breaker through a conductor, and connected to the other end of the cable. The busbar is formed by a solid-insulated busbar. The conductor connecting the vacuum circuit breaker to the busbar and the conductor connecting the vacuum circuit breaker to the grounding device are both formed by solid-insulated conductor. The circuit breaker chamber and the grounding device have a sealed structure.

Abstract: In an air circuit breaker provided with a make-and-break unit having a stator 11 and a blade-shaped movable element 10 rotatably supported with a support shaft 9 oppositely to the stator, comprising an electromagnetic operation unit 20 having a fixed iron core 33 provided in an upper position, a movable iron core 32 provided in a lower position oppositely to the fixed iron core, a coil 30 that connects/disconnects the fixed iron core 33 and the movable iron core 32, and a permanent magnet 38; capacitors 17a to 17c that energy-store electric power to excite the coil 30; a control circuit board 19 that controls a carrying direction of a current supplied from the capacitors to the coil 30 in response to an input command or a breaking command to the make-and-break unit; and a servo mechanism 16 connected to the movable iron core 32, that transmits a driving force by the electromagnetic force of the electromagnetic operation unit 20 to the make-and-break unit.

Abstract: An actuating mechanism for a switching device includes a plurality of electromagnets used in combination. Each electromagnet includes a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil. A permanent magnet is arranged in a gap surrounded by the movable iron core and the stationary core.

Abstract: An electromagnet a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil. A permanent magnet is arranged in a gap surrounded by the movable iron core and the stationary core.

Abstract: An electromagnet includes a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil. A permanent magnet is arranged in a gap surrounded by the movable iron core and the stationary core.

Abstract: An electromagnet includes a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil. A permanent magnet is arranged in a gap surrounded by the movable iron core and the stationary core.

Abstract: An electromagnet includes a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil. A permanent magnet is arranged in a gap surrounded by the movable iron core and the stationary core.

Abstract: An electromagnet composed of a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil, characterized by a permanent magnet arranged in a gap surrounded by the movable iron core and the stationary core, wherein the movable iron core is attracted by the stationary iron core by a magnetic field created by the permanent magnet, thereby it is possible to solve a problem inherent to a conventional electromagnet such that a permanent magnet is directly energized in a reverse direction during release operation so as to cause demagnetization of the permanent magnet.

Abstract: An electromagnet composed of a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil, characterized by a permanent magnet arranged in a gap surrounded by the movable iron core and the stationary core, wherein the movable iron core is attracted by the stationary iron core by a magnetic field created by the permanent magnet, thereby it is possible to solve a problem inherent to a conventional electromagnet such that a permanent magnet is directly energized in a reverse direction during release operation so as to cause demagnetization of the permanent magnet.