Kabushiki Kaisha Toshiba

Toshiba Energy Systems & Solutions Corporation

Amane Majima

Toshiyuki Uchii

Akira Shimamura

Norimitsu Kato

Hisashi Matsuda

Motofumi Tanaka

Hiroyuki Yasui

Toshiki Osako

Tooru Inoue

Takanori Iijima

Shohei Goshima

Tsutomu Tanaka

Tadashi Mori

Toshiyuki Nakano

Tomohiko Jimbo

Tomohiro Hasegawa

Yoshihiko Hirano

Yoshikazu Hoshina

Biswas Debasish

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 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 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 ().

In a gas circuit breaker, arc-extinguishing gas is filled in a container. A movable portion housed in the container includes a movable arc contact. The movable portion includes a pressure accumulator that increases pressure of an arc-extinguishing gas. An opposing portion housed in the container includes an opposing arc contact, an exhaust pipe, and a shielding portion. The shielding portion includes a first shielding wall intersecting with an axial direction of the pipe and a second shielding wall having a cylindrical shape extending from the first shielding wall toward the movable portion along the axial direction of the pipe. The second shielding wall includes through-holes. Lengths of the respective through-holes along the axial direction are from 18 millimeter's to 55 millimeters inclusive. An arc-extinguishing gas whose pressure has been increased in the pressure accumulator flows into a space to extinguish arc discharge, and flows into the second shielding wall.

A voltage application device of an embodiment applies a voltage between a first and second electrode disposed separately from each other in an airflow generation device, which is disposed on a rotation blade of a rotation apparatus, in which a rotation shaft of the rotation blade is held rotatably by a holding part. In the voltage application device of the embodiment, a voltage output unit outputs a voltage. Then, a sliding type transmission unit having electrodes disposed respectively on the rotation blade side and the holding part side of the rotation shaft transmits a voltage outputted from the voltage output unit from the holding part side to the rotation blade side. Then, a transformation unit disposed on the rotation blade side increases the voltage transmitted by the sliding type transmission unit and outputs the voltage to the airflow generation device.

Voltage application device, rotation apparatus and voltage application method

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.

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Kanagawa, Japan

Amane Majima