Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Reexamination Certificate
2006-04-11
2006-04-11
Sircus, Brian (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
Reexamination Certificate
active
07027280
ABSTRACT:
The present invention combines sensor portions22, 23of the device for measuring either current flowing through the line from the power inlet to the power outlet or voltage, or both, and bushings150, 160installed at either the power inlet or the power outlet, or both, so as to reduce the size of the gas insulating apparatus. Specifically, the above-mentioned sensor portions22, 23are installed in the space inside the porcelain tube15that constitutes the bushings150, 160.As this space, it is preferable to use the space on the outer-periphery side of the electric field relaxation member21provided inside the porcelain tube 15.
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Endo Fumihiro
Kato Tatsuro
Kobayashi Kazuo
Saito Kazuhiro
Utsumi Tomoaki
Demakis James A.
Hitachi , Ltd.
Mattingly ,Stanger ,Malur & Brundidge, P.C.
Sircus Brian
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