H - Electricity – 01 – B
Patent
H - Electricity
01
B
337/3
H01B 9/06 (2006.01) H01B 7/29 (2006.01) H02G 15/26 (2006.01)
Patent
CA 1081810
ABSTRACT OF THE DISCLOSURE Cooling apparatus and method for an electric cable installation in which the cable has a plurality of oil filled channels, the movement of the oil cooling the cable. The apparatus differs from prior art apparatus in that it uses a pair of multi-cylinder pumps, one at each end of the cable channels and having a number of oil operable cylinders equal to the number of channels, and a number of combination tanks at each end of the channels equal to the number of channels, each tank including an oil operable, bellows- type separator and the tanks and pump cylinders being connected so that the circuit for the cable oil is separate from the circuit for the actuating oil of the cylinders and from the fluid which opposes movement of the separator. Electrovalves at each end of the channels control the insulating oil flow between the channels and the tanks, and the opening and closing of the electro- valves and the operation of the pumps is coordinated so that cooling oil in the channels oscillates and moves simultaneously in the same direction when enforced or higher cooling is required. When the pumps and electrovalves are de-energized (electrovalves open), the system operates in a conventional manner to compensate for cooling oil expansion and contraction with normal, e.g., ambient and normal load, temperature changes.
277908
Ferrentino Antonio
Occhini Elio
Industrie Pirelli Societa Per Azioni
Smart & Biggar
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