Hitachi, Ltd.

Hitachi Industrial Equipment Systems Co., Ltd.

Akio Nakazawa

Kenji Tsuchiya

Ayumu Morita

Takashi Sato

Masato Yabu

Hisao Kawakami

Keiichi Takahashi

Makoto Yano

Takashi Shiina

Takamitsu Hae

Yasunobu Fujita

Shigeru Yokosuka

Seiji Seya

Tomohiro Sugino

Takumi Shinagawa

Kenichi Ogasawara

Masahiro Fukuchi

Kenji Koyama

Tomoyuki Kii

Satoshi Isono

Keisuke Abe

Matsuru Nakamura

Toshio Hashimoto

Provided is a reliable switch having a contact surface that is prevented from being roughened. To solve the problem, there is provided a switch including a plurality of switching unitsandeach including a fixed electrode and a movable electrode that is disposed to be opposed to the fixed electrode and is closed or opened with respect to the fixed electrode, the switch being characterized in that the switching unitsandeach make or break a current to be applied to the switch, the switching unitsandare electrically connected in series to each other, and the switching unitsandare each configured such that a first switching unitis first closed, and then a second switching unitis closed.

Switch

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 electromagnetlocated in a caseand fixed to the casethrough a fixing part, a capacitorlocated at an end in the case, a control boardlocated opposite to the capacitoracross the electromagnet, an auxiliary contactlocated above the capacitor, a movable part to move by a magnetic force generated from the electromagnet, and a power transmission section to operate in conjunction with movement of the movable part. The capacitorand the auxiliary contactare located at heights not exceeding the height of the fixing part for fixing the electromagnet

Operating device or vacuum switch

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.

Actuator for contactor

A vacuum insulating switch gear formed by integrally molding with epoxy resin of a vacuum double-break three-position type switch including a movable contact, a fixed contact, and a vacuum container composed of an insulating cylinder for covering the movable contact and the fixed contact, a lower lid for closing a lower part of the insulating cylinder, and an upper lid for closing an upper part of the insulating cylinder and an operation rod side of the movable contact, and an earthing switch with a vacuum closed container, comprising

Vacuum insulating switch gear

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Tokyo, Japan

Akio Nakazawa