Current transformer insulated by pressurized gas

Details Current transformer insulated by pressurized gas Current transformer insulated by pressurized gas

1983-07-08

1985-04-16

Pellinen, A. D.

Inductor devices

With outer casing or housing

336 62, 336 92, 174 17GF, H01F 2702

Patent

active

045118736

ABSTRACT:
A current transformer for outdoor high-voltage installations which is insulated by pressurized gas includes a metallic top housing mounted to a hollow porcelain insulator. The top housing contains a primary conductor which is surrounded by coils of the secondary circuit. The secondary terminal leads are installed in a grounded lead-through tube which is disposed within the hollow porcelain insulator. In order to increase the dielectric strength of the current transformer, the space which is enclosed by the top housing and the porcelain insulator is divided into a high-pressure region and a low-pressure region, the former region including zones which are exposed to high voltages, in particular the interior of the top housing, and which are bounded throughout by metal and a mechanically strong insulating material, such as a casting region. The partition between the high-pressure region and the low-pressure region preferably is a conical sleeve which surrounds the lead-through tube in the upper portion of the porcelain insulator.

REFERENCES:
patent: 2160660 (1939-05-01), Hobart
patent: 3281521 (1966-10-01), Wilson
patent: 4204084 (1980-05-01), Mastroianni et al.
patent: 4237333 (1980-12-01), Classon
patent: 4251682 (1981-02-01), Ebert et al.
"Gaseous Insulation for High Voltage Transformers" G. Camilli et al., AIEE Technical Paper 52-78, Dec. 1951.

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