Hitachi, Ltd.

Aces Electronics Co., Ltd.

Nec Corporation

Nabtesco Corporation

Japan Ae Power Systems Corporation

Kabushiki Kaisha Topcon

Other

Hitachi Energy Ltd

Calsonic Corporation

Aces Japan Co., Ltd.

Hiroaki Hashimoto

Hajime Urai

Nobukazu Kato

Kenichi Okubo

Masanao Terada

Yoichi Oshita

Takashi Iida

Daisuke Ebisawa

Katsuhiko Shiraishi

Ayumu Morita

Shinji Seto

Hideo Kawamoto

Yoko Hirohara

Yasuaki Aoyama

Makoto Hirose

Toshiaki Rokunohe

Tatsuro Kato

Riichi Nagao

Hideo Kobayashi

Makoto Koizumi

Taichiro Yamashita

Yu Hasegawa

Yoshiaki Nakaya

Youichi Ohshita

Hiroyuki Inaba

Junzo Kida

Masahiko Okuda

Masakazu Saito

Noriyuki Yaginuma

Takuya Shirata

Kiyoshi Okumura

Yuki Koyama

Go Kobayashi

Naohisa Kamiyama

Yutaka Moriyama

Yoshinori Takezawa

Yuki Nakai

Hiroto Miyamoto

Shinpei Matsuo

Naoki Osawa

Chien-Feng Huang

Shunta Mori

Taishiro Misao

Nobuyuki Nakamura

Yoshihiro Tada

Daisuke Oka

Yoshiko Fujieda

Shuji Fujisawa

Yoshihiro Kodama

A gas pressure monitoring device of a gas insulated switchgear () of the present invention includes at least two cylindrical vessels () that configure the gas insulated switchgear () to receive an insulating gas to be at an internal pressure. The at least two cylindrical vessels () have flanges (), and a plurality of bolts () that fasten the flanges of the at least two cylindrical vessels (). At least one bolt () of the plurality of bolts () includes at least one sensor () provided on the inner peripheral face thereof toward each of an inner diameter side and an outer diameter side of a cylindrical vessel () to measure strain acting in the axial direction of the at least one bolt () with the sensor (). A pressure gauge () is installed on the cylindrical vessel () and reads pressure of the insulating gas when the insulating gas is sealed into the cylindrical vessel (). A measurement recording unit () records pressure values output from the pressure gauge () and values output from the sensor (). An evaluation unit () calculates relationship between the pressure of the insulating gas and the stress acting on the at least one bolt () with the sensor () when the insulating gas is sealed into the cylindrical vessel (), wherein, after an operation of the switchgear () is started, change in the pressure (ΔP) of the insulating gas in the cylindrical vessel () is estimated from change in the stress acting on the at least one bolt () with the sensor (), so as to enhance monitoring the pressure of the insulating gas.

Gas pressure monitoring device of gas insulated switchgear, gas pressure monitoring method thereof, and gas leak position identification method

The present invention makes it possible to provide a connector comprising a contact that forms an electric connection with a counterpart contact, having a first contact piece and a second contact piece branched by a bifurcated branching part, as well as a first contact point element provided to the first contact piece and a second contact point element provided to the second contact piece in contact with the surface of the counterpart contact when the counterpart contact is inserted between the first contact piece and the second contact piece. At least one of the contact pieces has a first elastic part that has elasticity and is capable of being displaced in a direction orthogonal to the plate thickness. Providing a part curved in the plate thickness direction between the branching part of the contact pieces and the contact point elements allows the connector to adapt to the space allowed to the connector while maintaining a sufficient elastic force. The contact may have first and second contact pieces that differ in length and shape, but maintaining the contact points at the same position makes it possible to prevent a rotational moment received by the counterpart contact at the time of fitting.

Connector and connector set

A posture calculator that calculates the posture of a moving object based on a first hypercomplex number derived based on a detection result from an angular velocity sensor for detecting an angular velocity of the moving object and a second hypercomplex number that is derived based on a detection result from an angle sensor for detecting an angle of the moving object and that has the same number of terms as that of the first hypercomplex number.

Knee joint, posture calculator, method of controlling knee joint, and non-transitory computer-readable medium recording program for controlling knee joint

A connector is provided having a first contact, a first supporting portion, a second contact, a second supporting portion, a ground plate, and a third supporting position. The first contact has a first connection portion which is pushed to a first conductor to electrically connect with the first conductor. The first supporting portion receives a force to push the first connection portion to the first conductor. The second contact has a second connection portion which is pushed to a second conductor to electrically connect with the second conductor. The second supporting portion receives a force to push the second connection portion to the second conductor. The ground plate is arranged between the first contact and the second contact and has a shield connection portion which is pushed to at least one of a first shield portion covering the first conductor and a second shield portion covering the second conductor to electrically connect with at least one of the first shield portion and the second shield portion. The third supporting portion receives a force to push the shield connection portion to at least one of the first shield portion and the second shield portion.

Connector with ground plate between first contact and second contact

There is provided a receptacle unit including a plurality of receptacle connectors and mounted on an electronic apparatus, at least two guide reception portions which, when docking with a plug unit including a plurality of plug connectors, before at least one of the plurality of receptacle connectors engages with at least one of the plurality of plug connectors, receiving a guide portion of the plug unit, and a coupling portion which couples the at least two guide reception portions, at least one receptacle connector of the plurality of receptacle connectors which is mounted on a board independently of at least one other of the receptacle connectors, and the at least two guide reception portions and the coupling portion which are fixed to the board after the plurality of receptacle connectors are mounted on the board.

Receptacle unit

There is provided a plug unit including a plurality of predetermined standard plug connectors, the predetermined standard plug connectors each including a contact that connects with a connection terminal of a predetermined standard receptacle connector, and the plug unit includes one insulator which holds the contact that each of the plurality of predetermined standard plug connectors has and which defines an interval between the plurality of predetermined standard plug connectors and a posture of the predetermined standard plug connectors.

Plug unit and receptacle unit

Realized is a shape of a grooved cam that maximizes break performance by appropriately setting an electrode operation, with a minimum weight increase. A gas circuit breaker includes a drive side electrode and a driven side electrode which are disposed to face each other in a sealed tank, the drive side electrode having a drive side main electrode and a drive side arcing contact, the driven side electrode having a driven side main electrode and a driven side arcing contact, the drive side arcing contact being connected to an operating device, and the driven side arcing contact being connected to a double motion mechanism portion, in which the double motion mechanism portion includes a drive side connection rod that receives driving force from the drive side electrode, a driven side connection rod that is connected to the driven side arcing contact, a lever that is bent to the operating device side around a rotation axis by causing the driven side connection rod to operate in an opposite direction with respect to an operation of the drive side connection rod, and a guide that defines operations of the drive side connection rod and the driven side connection rod.

Gas circuit breaker

A switchgear driving device has a rod coupled to a movable electrode; an operation piston connected to the rod; and an operation cylinder in which an operation piston slides. A main control valve controls the pressure of the hydraulic oil in the operation cylinder. A turning-on pressure accumulation piston slides inside a turning-on pressure accumulation chamber; and a turning-on pressure accumulation spring imparts a driving force to the turning-on pressure accumulation piston to pressurize the hydraulic oil within the turning-on pressure accumulation chamber. A turning-off pressure accumulation piston slides inside a turning-off pressure accumulation chamber. A turning-off pressure accumulation spring imparts a driving force to the turning-off pressure accumulation piston to pressurize the hydraulic oil in the turning-off pressure accumulation chamber. A spring case accommodates the turning-on pressure accumulation spring and the turning-off pressure accumulation spring, wherein the turning-off pressure accumulation spring is arranged inside the turning-on pressure accumulation spring.

Hydraulic drive for a switchgear

A bidirectional driving mechanismhas a drive-side linkage rod, a driven-side linkage rod, two leversthat link the drive-side linkage rod with the driven-side linkage rod, and a guidethat regulates the operation of the drive-side linkage rodand the driven-side linkage rod. A moveable pinis passed through a first groove camof the drive-side linkage rod, a second groove camof the guide, and third groove camsof the levers, and by operation of the drive-side rod, the moveable pinmoves within the respective groove cams, causing the leversto rotate, the driven-side linkage rodto be driven in a direction opposite to the drive-side linkage rod, and a driven-side arc electrodeto be driven in a direction opposite to a drive-side arc electrode

To provide a gas circuit breaker having a space-saving reliable double motion mechanism having a high degree of freedom in design. A double motion mechanism section of the gas circuit breaker is formed of a drive-side connecting rod, a driven-side connecting rod, levers connecting them and a guide regulating operations of the drive-side connecting rod and the driven-side connecting rod. A movable pin is connected to a first grooved cam formed in the drive-side connecting rod, a second grooved cam formed in the guide and third grooved cams formed in the levers respectively, and posture holding members are provided in the movable pin. The movable pin moves in the respective grooved cams by an operation of the drive-side connecting rod, thereby rotating the levers, driving the driven-side connecting rod in an opposite direction of the drive-side connecting rod, and driving the driven-side arcing contact in an opposite direction of the driven-side arcing contact.

{Problem} To provide a connector which includes two or more predetermined standard connectors and is capable of securely absorbing deviation in a position and a posture of the two or more predetermined standard connectors during mounting thereof. {Solution to Problem} A connector including a plurality of predetermined standard connectorswhich connects with a partner connector; and covershaving a first opening portion covering the plurality of predetermined standard connectors and allowing an engagement portion to be exposed, the engagement portion to be engaged with the partner connector of the predetermined standard connector, in which between an outer wall portionof the predetermined standard connector and a wall portion forming the first opening portion, a predetermined space is formed such that the predetermined standard connector can move relative to the cover on a cross plane crossing an engagement direction of engagement with the partner connector, and a first control portion which controls, with respect to the first opening portion, at least either one of a position and a posture of at least one of the predetermined standard connectors.

Floating connector

A connector includes a first connector and a second connector mounted on an external device. The first connector includes a contact including a contact portion electrically connected to a connection terminal of the second connector by pressing the connection terminal in a predetermined direction; a flexible conductor connected to the contact; a protection member that protects the contact portion by covering a periphery of the contact; a base body that accommodates the contact, the flexible conductor, and the protection member; and an elastic member that is formed separately from the contact and presses the contact and the protection member in a direction opposite to the predetermined direction.

Press-type connector

A gas circuit breaker includes a breaking unit tank incorporating a fixed electrode and a movable electrode, a spring operation device including a breaking spring and a closing spring and configured to move the movable electrode, and a mechanism unit configured to couple the movable electrode side and the spring operation device side and transmit power received from the spring operation device to the movable electrode. The spring operation device is supported by a frame. The frame is fixed to a rear plate provided in a mechanism unit frame of the mechanism unit. A breaking spring case and a closing spring case of the spring operation device are fixed to pedestals via a plate memberand a support section

Gas circuit breaker and breaker for gas insulated switching device

This invention relates to a technique for hermetically sealing an artificial leg including a cylinder device. A rod member of the cylinder device extends from the inside to the outside of a shell structure of the cylinder device. The rod member is hermetically sealed at the periphery thereof by a bellows packing member. The bellows packing member comprises an inner bead, an outer bead which concentrically surrounds the outside of the inner bead, and a bellows packing body part which connects the inner and outer beads. The bellows packing body part includes corrugations, and each corrugation is less curved than an imaginary circle which is concentric with the inner bead and the outer bead. Both ends of each of the plurality of corrugations extend to the outer bead or are located at positions closer to the outer bead than the inner bead.

Hermetically sealed artificial leg

The invention is intended to provide a circuit breaker or a circuit breaker operating method enabling a current interruption action to be performed efficiently. A circuit breaker is characterized in that includes a fixed contact and a movable contact that comes in and goes out of contact with the fixed contact; a main circuit conductor that is electrically connected to the fixed contact and the movable contact; an operating mechanism including a mover configured by concatenating permanent magnets or magnetic materials alternately having opposite N and S magnetic polarities along the direction of motion axis of the movable contact and magnetic poles disposed to face the N and S magnetic polarities of the mover and wound with windings; a current detector that detects a current flowing through the main circuit conductor; and a control device that varies the amount of a current to be supplied to the windings of the magnetic poles, depending on a current value detected by the current detector.

Circuit breaker and circuit breaker operating method

Growing community of inventors

Tokyo, Japan

Hiroaki Hashimoto