Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1991-07-25
1993-07-27
Scott, J. R.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200148R, 200150G, H01H 3370
Patent
active
052312569
ABSTRACT:
A puffer type gas-insulated circuit breaker is adapted to, when its movable electrode separates from a stationary electrode, enable an insulating gas blow toward an occurring arc to extinguish the same. An insulated nozzle is provided to direct the gas toward the arc and forms a gas passage in cooperation with an insulating cover which covers the movable electrode. The insulated cover is formed of an insulating material which contains a filler for preventing energy lines of the arc from entering the cover. Furthermore, the insulated cover has a specific inductive capacity greater than a specific inductive capacity of the insulated nozzle so as to reduce the electric field strength at the front end of the movable electrode.
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Ibuki, K. et al. "Key Technologies for Developing a 420 KV 50KA GCB Interrupter Unit", 89 WM 077-9 PWRD, .COPYRGT.1989 IEEE, 7pp. (presented at IEEE/PES Winter Meeting, New York, N.Y. Jan. 29-Feb. 3, 1989).
Amano Naoki
Kurokawa Koji
Sasaki Koji
Tsubaki Toru
Yamagiwa Tokio
Hitachi , Ltd.
Scott J. R.
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