Electricity: conductors and insulators – With fluids or vacuum – With fluid-condition responsive and/or indicating means
Patent
1980-05-01
1981-09-22
Askin, Laramie E.
Electricity: conductors and insulators
With fluids or vacuum
With fluid-condition responsive and/or indicating means
174 19, H02G 1522
Patent
active
042911923
ABSTRACT:
A pothead installation for a high voltage, high pressure oil-filled, electric cable in which the pothead is surrounded by a metal tank at ground potential, the tank being filled with sulfur hexafluoride gas under pressure. Oil and nitrogen within the pothead are conveyed to the exterior of the tank by a tube of insulating material having electrical characteristics and a length adequate to withstand at least the voltage difference between the cable conductor and the tank and having physical characteristics adequate to withstand at least the pressures of the oil and nitrogen. At the end of the tube at the tank wall, the tube is connected to a reservoir which is mounted exteriorly of the tank and which accumulates the oil and nitrogen. The reservoir has a venting valve for venting the nitrogen and oil, has a sight gauge for monitoring the oil level in the reservoir, and may have a float switch connected thereto for operating an alarm when the volume of the nitrogen exceeds a predetermined value.
REFERENCES:
patent: 3013101 (1961-12-01), Domenach
Eccleston Thomas F.
Wilson Walter M.
Askin Laramie E.
Consolidated Edison Company of New York, Inc.
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