Kabushiki Kaisha Toshiba

Toshiba Energy Systems & Solutions Corporation

Toshiyuki Uchii

Akira Shimamura

Norimitsu Kato

Amane Majima

Takanori Iijima

Tomoyuki Yoshino

Tadashi Mori

Takato Ishii

Tsutomu Tanaka

Tomohiro Hasegawa

Hiroshi Furuta

Tooru Inoue

Takeshi Shinkai

Yoshihiko Hirano

Yoshikazu Hoshina

Yuko Imazawa

Katsumi Suzuki

Katsumi Hisano

Takahiro Terada

Tadashi Koshizuka

Takayuki Masunaga

Toshiyuki Nakano

Motoharu Shiiki

Misuzu Sakai

Hiroki Tashiro

Takanori Yasuoka

A gas insulation apparatus has a sealed container, an insulation gas, a high-voltage portion, and a removal material. The insulation gas has COand Ofilling the sealed container as main components. The high-voltage portion is stored in the sealed container. The removal material reduces concentrations of HF, CO, and Oin the insulation gas.

Gas insulation apparatus

A gas circuit breaker includes a sealed container in which the arc-extinguishing gas is enclosed, a first fixed contactor portion and a second fixed contactor portion fixed to the sealed container, and a movable contactor portion which moves between the first fixed contactor portion and the second fixed contactor portion, to conduct and break current between them, in which an arc generated at a time of current breaking action is extinguished by spraying the arc-extinguishing gas, the gas circuit breaker includes a gas chamber configured to accumulate the unnecessary gas, the sealed container is formed by joining ends of the two hollow truncated cone portions, each having a large opening diameter, with the cylindrical portion therebetween, and the gas chamber is formed inside the cylindrical portion forming the sealed container.

Gas circuit breaker

A gas circuit breaker includes a first arc contactor electrically connected to a first lead-out conductor, a cylindrical guide portion provided on a second lead-out conductor side, a trigger electrode arranged to be movable between the first arc contactor and the guide portion, and igniting an arc along with a movement in a first half of a current breaking action, a compression chamber being formed by a cylinder having an outer wall and an inner wall both formed in a cylindrical shape, and a piston sliding between the outer wall and the inner wall, and an insulation nozzle guiding the arc-extinguishing gas to an arc ignited at the first arc contactor. The insulation nozzle is formed integrally with the inner wall of the cylinder.

A gas circuit breaker includes a trigger electrode which is arranged to be movable between a first arc contactor and a second arc contactor, a compression chamber for pressurizing arc-extinguishing gas, the compression chamber being formed by a cylinder which has an outer wall and an inner wall, each being formed in a cylindrical shape, and which is provided to the second arc contactor, and a piston that slides between the outer wall and the inner wall in conjunction with the trigger electrode, and an insulation nozzle that guides the arc-extinguishing gas pressurized in the compression chamber to an arc ignited between the first arc contactor and the second arc contactor. The insulation nozzle is supported by the inner wall of the cylinder.

A gas circuit breaker comprises: a first arc contactor; a cylindrical second arc contactor; a rod-shaped trigger electrode 31 that is disposed to be movable between the first arc contactorand the second arc contactor, and moves inside the cylindrical second arc contactorto ignite an arc at the second arc contactorin the latter half of the current break interval; and a guide portionthat has an inner diameter larger than the outer diameter of the trigger electrode, has an inner diameter smaller than the inner diameter of a portion of the second arc contactorwhich is close to the trigger electrode, and is disposed in the cylinder of the second arc contactorso as to go around the trigger electrodewhen the trigger electrodeis in a closed state with the first arc contactor

A gas circuit breaker of an embodiment includes a sealed container, a first contact part and a second contact part, an operation mechanism, an insulating nozzle, a pressure accumulator, and an electric field shield. The insulating nozzle is displaced in conjunction with the first contact part in a separation process of the first contact part and the second contact part. The insulating nozzle surrounds arc discharge generated between the first contact part and the second contact part. The electric field shield is attached to the insulating nozzle. The electric field shield has a floating potential during a period of at least part of the separation process. The electric field shield is electrically connected to the second contact part such that the electric field shield has the same potential in a completely open electrode state in which separation between the first contact part and the second contact part is terminated.

A gas circuit breakerincludes an insulation nozzlethat guides arc-extinguishing gas to an arc between a first arc contactorand a second arc contactorwhen a trigger electrodebecomes an opened state relative to the first arc contactor. The second arc contactorhas an openingfor spraying the arc-extinguishing gas, and the openingis closed by the trigger electrodein the first half of a current breaking action, and is opened by separation of the trigger electrode in the latter half of the current breaking action. An opening area of a first exhaust portformed between the second arc contactorand the insulation nozzlefor exhausting the arc-extinguishing gas is 0.2 times or more and two times or less of an opening area of the openingof the second arc contactor

A gas circuit breaker to reduce deterioration of insulation and current-breaking performance thereof includes a sealed container () filled with arc-extinguishing gas. A first fixed contactor portion () and a second fixed contactor portion () are fixed to the sealed container (). A movable contactor portion () moves between the first fixed contactor portion () and the second fixed contactor portion () and conducts and breaks current between the first fixed contactor portion () and the second fixed contactor portion (). An arc is generated between a fixed arc contactor () provided to the first fixed contactor portion () and a movable arc contactor () provided to the movable contactor portion () when current breaking action is extinguished by an arc-extinguishing gas being sprayed thereto. Unnecessary gas generated from the arc-extinguishing gas sprayed to the arc is accumulated in a gas chamber ().

According to an embodiment, a gas-blast circuit breaker comprises a heat removal unit in a flow path of arc extinguishing gas. The heat removal unit each includes: plate-shaped heat removal members contacting the arc extinguishing gas flowing in the flow path; and a holding portion holding the plate-shaped heat removal members to stack the heat removal members at intervals in a thickness direction. Each of the heat removal members includes: an upstream side end portion; a downstream side end portion; and a thickest portion with a largest thickness which is provided between the upstream side end portion and the downstream side end portion. Thickness of the heat removal member continuously changes between the upstream side end portion and the downstream side end portion via the thickest portion.

Gas-blast circuit breaker

A pair of fixed arc electrodes are arranged facing each other within a sealed container that is filled with arc-extinguishing gas. There are provided: a compression puffer chamber for accumulating pressurized gas that is obtained by elevating the pressure of the arc-extinguishing gas; and an insulated nozzle that directs the pressurized gas towards the arc discharge from the compression puffer chamber. A buffer chamber is provided, in which hot exhaust gas generated by the heat of the arc discharge is temporarily accumulated. A pressurized gas through-flow space is provided, communicating with the compression puffer chamber. In the pressurized gas through-flow space, an opening/closing section prevents inflow of hot exhaust gas by assuming a closed condition during the earlier half of the current interruption period, and in the latter half of the current interruption period the opening/closing sectionis opened to allow flow of pressurized gas.

The gas circuit breaker includes a sealed container filled with an arc-extinguishing gas, a pair of fixed arc electrodes arranged in the sealed container to be opposite to each other, a trigger electrode movably arranged between the fixed arc electrodes and generating an arc discharge according to movement, a pressurization chamber pressuring and increasing a pressure of the arc-extinguishing gas with pressurization means, and a pressure accumulation chamber in communication with the pressurization chamber and accumulating the pressurized arc-extinguishing gas. The trigger electrode switches the pressure accumulation chamber into a closed state or an open state. The pressure accumulation chamber is switched to the closed state in a first half of breaking of the electric current, and the pressure accumulation chamber is switched to the open state in a latter half of breaking of the electric current. The arc-extinguishing gas in the pressure accumulation chamber is guided to the arc discharge.

A temperature measurement device is provided with: light collection means; extraction means; optical intensity calculation means; and temperature measurement means. The light collection means collects the emission spectrum of a measurement subject. The extraction means extracts light having the wavelength of the atomic spectral lines and light having a wavelength in a wavelength region where there are no atomic spectral lines, from the emission spectrum collected by the aforementioned light collection means. The optical intensity calculation means calculates the optical intensities of the light extracted by the aforementioned extraction means. The temperature measurement means calculates the temperature of the aforementioned measurement subject, based on the intensities of the beams calculated by the aforementioned optical intensity calculation means.

Temperature measurement device

According to an embodiment, a gas insulated electrical equipment includes: a high-voltage conductor to be electrically charged; a hermetically sealed tank to be filled with insulating gas, one or more insulating spacers for dividing the hermetically sealed tank into gas compartments and supporting the high-voltage conductor; and a pressure release device equipped with a mouth of flow channel adapted to allow the inside and the outside of the hermetically sealed tank to communicate with each other so as to release the pressure in the hermetically sealed tank, which maintains the hermetically sealed state in an ordinary condition where the pressure in a gas compartment does not exceed the working pressure but releases the pressure in the hermetically sealed tank in an abnormal condition where the pressure in the gas compartment exceeds the working pressure.

Gas insulated electrical equipment

According to an embodiment, a gas insulation apparatus (e.g., a gas circuit breaker) includes a high-voltage unit, a zeolite and an insulation gas in a closed vessel. The insulation gas is COgas or a gas including COgas as the main component. The zeolite is contained in a zeolite case and is placed under an insulation gas atmosphere. COis adsorbed on the zeolite before use of the gas insulation apparatus.

Disclosed is a gas insulated switchgear constituted such that electrical contacts are placed inside a sealed vessel filled with an arc extinguishing gas, and when electrical current passes, the electrical contacts are held in contact and pass electricity, and when the current is interrupted, the electrical contacts are separated and an arc discharge is produced in the arc extinguishing gas, and the current is interrupted by extinguishing this arc. The arc extinguishing gas is a mixed gas, the main constituents of which are Ngas and CHgas, and the CHcontent is at least 30%. Alternatively, the arc extinguishing gas is a mixed gas, the main constituents of which are COgas and CHgas, and the CHcontent is at least 5%.

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Kanagawa, Japan

Toshiyuki Uchii