High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices – Air-current blowout
Reexamination Certificate
1999-08-02
2001-08-21
Scott, J. R. (Department: 2832)
High-voltage switches with arc preventing or extinguishing devic
Arc preventing or extinguishing devices
Air-current blowout
C361S117000, C361S604000
Reexamination Certificate
active
06278073
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention is related to gas insulated switching apparatus, and especially, it concerns gas insulated switching apparatus which compacted line side unit.
2. Description of Related Art
Gas insulated switching apparatus are configured such that electric conductors for electrically connecting circuit-breakers, disconnectors, earth switches, and transformers for instruments to each other are housed in enclosed vessels filled with insulating gas. These gas insulated switching apparatuses advantageous in terms of miniaturization, insulating performance, and safety have been extensively installed at electric stations such as transforming stations.
In a prior art gas insulated switching apparatus disclosed in Japanese Patent Laid-open No. Hei 4-109808, a disconnector unit is provided between a lightning arrestor element unit and a high voltage conductor unit in such a manner that the lightning arrestor element unit is movable to open/close the disconnector, and an operating unit is disposed outside a vessel of the lightening arrestor element unit for opening/closing the disconnector by driving the lightening arrestor element unit using the external operating unit, thereby allowing the lightning arrestor element unit to be contacted with or separated from the high voltage conductor unit.
In a prior art gas insulated switching apparatus disclosed in Japanese Patent Laid-open No. Hei 8-265925 and Japanese Utility Model No. Sho 60-117610, a movable contact is provided on a lightening arrestor main body on the power supply side, and a straightforward sliding shaft is provided on the lightning arrestor on the earth side in such a manner as to air-tightly pass through the bottom plate of a tank, wherein the lightning arrestor main body is vertically moved to be turned on/on.
However, the concrete means for compacting the container that lightning arrester was put was not considered in conventional gas insulated switching apparatus.
SUMMARY OF THE INVENTION
A first object of the present invention is to provide a gas insulated switching apparatus which compacted the container that lightning arrester was put.
To achieve the above object, according to the present invention. there is provided a gas insulated switching apparatus including a line side unit has a electric power line, which comprising, a lightning arrester is established in the line side unit, which relatively moves for the container of the line side unit, and connected on/off the electric power line. and a cover which supports said lightning arrester is in the position which is lower than the basal plane of the line side unit
REFERENCES:
patent: 3629660 (1971-12-01), Kamada et al.
patent: 4136299 (1979-01-01), Nagai et al.
patent: 4553189 (1985-11-01), Pivit et al.
patent: 5574613 (1996-11-01), Shirakawa et al.
patent: 60-117610 (1985-06-01), None
patent: 8-265925 (1996-10-01), None
Kida Junzo
Takahashi Kazuhiko
Tsuzura Keiichi
Watanabe Yasuhito
Yabuki Minoru
Hitachi , Ltd.
Mattingly, Stanger & Malur, P.C .
Scott J. R.
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