Hitachi, Ltd.

Hitachi Industrial Equipment Systems Co., Ltd.

Tokyo Keiki Inc.

Max Co., Ltd.

Mitsubishi Petrochemical Company Limited

Toshiba Battery Co., Ltd.

Nok Klueber Co., Ltd.

Kenji Tsuchiya

Ayumu Morita

Masato Kobayashi

Shuichi Kikukawa

Takashi Sato

Tomoaki Utsumi

Daisuke Sugai

Goro Daimon

Takuya Kurogi

Makoto Yano

Masato Yabu

Miki Yamazaki

Akio Nakazawa

Yuko Kajiyama

Fumihiro Endo

Keiichi Takahashi

Shigeru Kikuchi

Satoru Kajiwara

Takumi Ishikawa

Takashi Shirone

Naoki Nakatsugawa

Makoto Watanabe

Hiroyuki Ozawa

Yukio Kurosawa

Noboru Baba

Toshiaki Rokunohe

Osamu Koyanagi

Kazuhiro Satou

Takao Murakoshi

Yoshihito Asai

Toyokazu Tanaka

Kogi Ishikawa

Eisaku Mizufune

Yuuichirou Yamane

Yoshinori Shimada

Hisao Kawakami

Kazuhiro Sato

Naoya Okada

Masanori Tsukushi

Katsuji Ikeda

Hiroshi Yui

Youichi Ohshita

Junichi Katagiri

Kunio Hirasawa

Mitsutaka Miyabayashi

Minoru Sakaguchi

Toshio Nitta

Hiroshi Suzuyama

Jun Nukaga

Katsuichi Kashimura

Shuuichi Kikukawa

Yoshiki Sakamoto

Takamitsu Hae

Tooru Kikuchi

Kozo Iwaki

Wataru Murata

Yasunobu Fujita

Hironori Tonosaki

Kastuichi Kashimura

Kuniaki Inada

Hiroshi Yoshimoto

Shigeru Yokosuka

Takao Kanno

Ken'ichi Natsui

Takuya Sugawara

Yoshinori Nishizawa

Toshifumi Nishii

Hideo Kitabayashi

Seiji Seya

Akitaka Shiina

Mitsuaki Yamamoto

Hiroaki Morii

Takao Yanagisawa

Takafumi Hosono

Takahiko Sawada

Yuuko Kajiyama

Nobuyuki Yamada

Tomohiro Sugino

Kenichi Shoda

Youichirou Taniguchi

Hiroyoshi Nose

Takumi Shinagawa

Kenichi Ogasawara

Masahiro Fukuchi

Kenji Koyama

Tomoyuki Kii

Satoshi Isono

Keisuke Abe

Matsuru Nakamura

Toshio Hashimoto

A moving device for moving on a wall surface that includes at least two or more vehicles each having a body, two main wheels each disposed on the body and rotatable around a shaft for moving on a wall surface, two rotation drivers which rotate each of the two main wheels respectively, and an adhesion mechanism disposed on the body to adhere onto the wall surface; and a coupler that connects vehicles located adjacent to each other among the at least two or more vehicles in the traveling direction of each of the vehicles.

Moving device

An adhesion devicethat defines a decompression space D to be decompressed between a wall surface W and the adhesion device, and adheres to the wall surface W, comprises: a basedisposed facing a wall surface W at a distance from the wall surface W and connected to a decompression devicethat depressurizes the decompression space D created between the baseand the wall surface W; a first partitiondisposed on a fringe of the base, wherein the first partitionforms the baseside portion of the peripheral wall of the decompression space D with an elastic member; a second partitiondisposed closer to the wall surface W side than the first partition, wherein the wall surface W side portion of the peripheral wall of the decompression space D is formed by an elastic member so that the wall surface W side end of the second partitioncontacts the wall surface W; and a first restricting memberformed in a frame shape corresponding to that of the second partitionby a member having a higher rigidity than that of the second partition, wherein the first restricting memberis disposed on the second partitionso as to restrict the deformation of the baseside end of the second partitionfrom being pulled into the decompression space D as the decompression space D becomes negatively pressured.

Adhesion device

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.

Branching unit and vehicular system

A railroad vehicle includes a plurality of vehicle units, a cable, and a disconnector. In the plurality of vehicle units respective vehicles are coupled. The cable is placed astride the vehicles to connect the power supply unit of each vehicle unit. The disconnector is installed at some midpoint in the cable and electrically separates the vehicle units from one another.

Railroad vehicle

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

A switchgear including a plurality of switch units having a fixed electrode and a movable electrode; and an operating device configured to operate the movable electrode of each of the switch units, wherein the operating device is configured of one motive part and two follower parts that intermittently operate with each other, and part of each of the follower parts touches the motive part, thereby in a condition that moving force is not transmitted from the motive part to the follower part, a state of the follower part is fixed, and in a condition that the motive part shifts from an initial position to a final position, a state of one of the follower parts is allowed to transit, and a state of the other of the follower parts is changed with a delay from such state transit, thereby the switch units are driven while a time delay is produced.

Switchgear and opening and closing method thereof

A resistor for suppressing magnetizing inrush current includes a container made of an insulating material and at least one resistive element housed in the container, the resistive element being connected to two bushings provided at the container, the outer surface of the container being coated with a conductive paint, and the paint being connected to the ground, thereby being able to be located between a cable and a switch, and being able to fix the outer surface thereof to a ground voltage level so that human contact safety is not impaired.

Resistor, method of assembling the same, and switchgear

A slide electricity structure according to the present invention uses grease for electrical contacts wherein contact resistance does not gradually increase even when exposed to sliding and lifetime is long, and has a silver-plated spring contact that contacts or separates by way of sliding and grease for electrical contacts that has been applied to the spring contact and contains perfluoropolyether oil having an average molecular weight between 2600 and 12500 as a base oil and PTFE having a primary particle diameter of 1 &#x3bc;m or less as a thickener.

Grease for electrical contact and slide electricity structure, power switch, vacuum circuit breaker, vacuum insulated switchgear, and vacuum-insulated switchgear assembling method

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

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.

Switchgear

In order to improve cooling performance of a switch unit or switchgear equipped with the switch unit, the switch unit includes a switch having a movable electrode and a fixed electrode and is casted as one body with a resin, the resin is provided with resin fins, and the thickness of the resin fin is changed so that the resin fin has a thickness sloped in the longitudinal direction of the resin fin.

Switch unit and switchgear equipped therewith

It is an object to provide a switchgear capable of alleviating burden to a manager. In order to solve the aforementioned problem, the switchgear according to the present invention includes a plurality of compatible switch units each provided in a housing and closing/interrupting/ground functions so that the plurality of switch units are connected to supply power to the load side.

A switchgear includes an earthing and disconnecting switch which linearly moves and is switchable to a disconnecting and an earthing positions, a vacuum valve which performs closing and breaking of a current in a vacuum container producing vacuum inside, and a solid insulator with which the earthing and disconnecting switch and the vacuum valve are covered, therein the earthing and disconnecting switch and the vacuum valve are electrically connected, and closing and breaking of a current is performed in the vacuum valve.

Switchgear and method for operating switchgear

A switchgear includes a chassis which is partitioned by metal earthed plates and includes a bus bar section located at a central portion, a switch section located below the bus bar section, a cable section located at a rear surface side, and a control section located at a front surface side; an air-insulated earthed disconnecting switch provided in the switch section; and a manipulating device. The switch section is separable from the chassis, and is configured as a case having a semi-closed structure which allows air to pass therethrough but prevents particles of oil and water from passing therethrough.

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Hitachi, Japan

Kenji Tsuchiya