Smk Corporation

Hitachi Energy Ltd

Yuki Koyama

Kiyoshi Asai

Toshihiko Kato

Hiroaki Hashimoto

Takashi Iida

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

There are provided an electrical connection structure, an electrical connection method and an electric connector capable of improving contact reliability, and an electric device including the electrical connection structure. The electrical connection structure includes a swage part configured to sandwich a first electric conductor and a sheet member having a second electric conductor, and an elastic member provided between the first electric conductor and the sheet member in a sandwiching portion of the swage part, the elastic member being configured to connect between the first electric conductor and the sheet member. The first electric conductor and the second electric conductor are electrically connected to each other via a contact point provided in the first electric conductor and a contact point provided in the second electric conductor in the sandwiching portion.

Electrical connection structure, electrical connection method, electric connector, and electric device

Electrical connector

A connector and a connector assembly capable of being attached to a freely bendable object such as clothes when used are provided. A connector is attached to a predetermined object such as a clothes and capable of being detachably fitted into a counterpart connector The connector includes: a plate-shaped housing made of an insulating material having bendability; a retention member provided in the housing so as to allow for the bendability, the retention member being configured to retain a fit state with the counterpart connector; a flexible sheet attached to the housing in such a manner as to cover at least a part of the retention member and attached to the object by attaching material; and a conductive contact provided on the sheet.

Connector and connector assembly

A connector and a connector assembly capable of being attached to a freely bendable object such as clothes when used are provided. The connector to be fit to a counterpart connector includes a housing; a conductive contact provided in the housing; and a plurality of holding members comprising a magnetic material provided in the housing. The holding member is configured to be attracted to a magnetic material of the counterpart connector when the connector is fit to the counterpart connector to maintain a fit state. The housing is bendable, and has a plurality of fixing holes formed therein. The holding members are disposed in parallel apart from each other in a longitudinal direction (X direction) in the surface of the housing.

A waterproof connector capable of maintaining high waterproof properties even under high water pressure is provided. The waterproof connector includes: a connector main body having connection terminals held by a housing; a casing having a connector accommodating portion in which the connector main body is accommodated; and a sealing material fixed to an outer peripheral portion of the housing and preventing water from entering between the housing and the casing. The sealing material includes a peripheral abutting portion configured to abut against an inner peripheral surface of the connector accommodating portion, and a rear abutting portion configured to abut against a rear wall portion of the connector accommodating portion, and the housing includes a sealing material supporting surface configured to support a rear surface portion of the rear abutting portion.

Growing community of inventors

Tokyo, Japan

Yuki Koyama