Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1989-01-04
1990-10-30
Thompson, Gregory D.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
361341, 361355, 361361, H02B 104
Patent
active
049673076
ABSTRACT:
In a gas-insulated switchgear apparatus, breakers of three phases are contained in a barrel-type sealed enclosure having an insulating gas sealed therein. At least one terminal of each of the breakers is connected to each of a plurality of main buses arranged on the outside of the sealed enclosure, and a common casing is attached to one side of the sealed enclosure to extend in the height direction thereof. The ground housing of each of the main buses is connected through an insulating spacer to the common casing. Connecting conductors for connecting the terminals of the breakers with the bus conductors of the main buses are led into the casing or a plurality of current transformers are arranged in the casing. By so doing, the sealed enclosure is reduced to a size having a sectional area sufficient for juxtaposition of the breakers of three phases and thus the whole gas-insulated switchgear apparatus is made more compact and smaller. Also, the connecting conductors and the current transformers are isolated from the breakers by arranging them inside the common casing and this has the effect of enhancing the insulation reliability and ensuring suitable arrangement of the current transformers.
REFERENCES:
patent: 3823346 (1974-07-01), Olsen
patent: 4687890 (1987-08-01), Yamamoto et al.
patent: 4744002 (1988-05-01), Nakano et al.
patent: 4752860 (1988-06-01), Romanet et al.
patent: 4821141 (1989-04-01), Torimi et al.
Itou Syunji
Sakaguchi Minoru
Suzuki Yoshiro
Hitachi , Ltd.
Thompson Gregory D.
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