Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1986-02-24
1988-03-08
Leung, Philip H.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
174 18, 174151, 200 50AA, 361338, 361341, H02B 1114
Patent
active
047302313
ABSTRACT:
A gas insulated metal-clad electrical power equipment has a cylindrical insulating bushing for supporting an electrical conductor. The bushing is filled with the insulating gas therein and air-tightly fixed to a grounded metal compartment wall member of the equipment in such a way that the outer surface of the conductor directly faces the inner circumferential surface of a through hole formed in the wall member with a distance g therebetween. When the axial length l of the inner cylindrical space of the bushing is determined as l.gtoreq.g/4 and further the difference in diameter between the wall through hole .phi..sub.1 and the inner cylindrical space .phi..sub.2 of the bushing is determined as .phi..sub.2 -.phi..sub.1 .gtoreq.4 mm, it is possible to effectively prevent dielectric breakdown along the surface of the bushing. Owing to the above arrangement, it is possible to effectively reduce the size, space, weight, cost, etc. of the bushing, as compared with conventional ones.
REFERENCES:
patent: 3030463 (1962-04-01), Kozlovic et al.
patent: 3130353 (1964-04-01), Mount
patent: 3188415 (1965-06-01), Netzel
patent: 3461348 (1969-08-01), Eichelberger
patent: 4476361 (1984-07-01), Masaki et al.
Tanigaki Shuzo
Tokushige Masashi
Kabushiki Kaisha Meidensha
Leung Philip H.
Thompson Gregory D.
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