Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1991-07-11
1993-03-02
Scott, J. R.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200148B, H01H 3366, H02B 701
Patent
active
051911809
ABSTRACT:
A gas-insulated switchgear in which a vacuum switch main contact assembly constituted by a fixed contact element and a movable contact element is enclosed in a vacuum tank. The vacuum switch has a movable terminal fixed at its one end to the movable contact element and is led out from the vacuum tank through a bellows. The vacuum switch is enclosed in a gas tank filled with an insulating gas having gas pressure not less than the atmospheric pressure. The main contact assembly of the vacuum switch is operated so as to perform electrical connection and disconnection functions, through a transmission mechanism, by a driver provided outside of the gas tank. A driving rod transmits an operating force of the driver to the movable terminal of the vacuum switch. The driving rod is led out from the gas tank through another bellows mounted to the gas tank.
REFERENCES:
patent: 3814882 (1974-06-01), Harrold
patent: 4426560 (1984-01-01), Kimblin
patent: 4434332 (1984-02-01), Yanabu et al.
patent: 4458119 (1984-07-01), Hashimoto et al.
patent: 4593165 (1986-01-01), Steinemer
Kitamura Tadao
Kobayashi Toshio
Matsumura Yosikata
Fuji Electric & Co., Ltd.
Scott J. R.
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