Explosion resistant, oil insulated, current transformer

Details Explosion resistant, oil insulated, current transformer Explosion resistant, oil insulated, current transformer

1991-12-11

1995-02-21

Vo, Peter Dungba

Electricity: conductors and insulators

With fluids or vacuum

Boxes and housings

174 17LF, 336 92, 439559, H01F 2702, H01F 2706, H01F 4006, H05K 502

Patent

active

053918355

ABSTRACT:
A head type current transformer having an aluminum head housing mounted on top of and supported by a porcelain insulator. The head housing and insulator together define an enclosure housing therein an, insulated, electrical component immersed in a liquid dielectric. The transformer unit is rendered explosion resistant by having a shock wave attenuator located at least partially in the liquid in the vicinity of the juncture of the housing and insulator to reduce the force of a shock wave originating in the head housing below that which would cause fracturing of the porcelain insulator. A selected area of the wall of the head housing is also patterned to facilitate its rupture in a predetermined area which is in the region of the highest voltage stress area. A filler material of felt is also used to displace a portion of the oil dielectric at the area of weakness.

REFERENCES:
patent: 2504647 (1950-04-01), Camilli
patent: 2529135 (1950-11-01), Camilli
patent: 2703390 (1955-03-01), Marks
patent: 3380009 (1968-04-01), Miller
patent: 3792397 (1974-02-01), Reinemann
patent: 3955871 (1976-05-01), Kruger
patent: 4054351 (1977-10-01), Gallay et al.
patent: 4054856 (1977-10-01), Linscott, Jr.
patent: 4231631 (1980-11-01), Guerinault et al.
Trench Electric Bulletin 500-05 May 1983 "Current Transformers".
"Cover Bushings on L-M Round-Wound Transformers" Alvin Coyle, Electrical World, May 26, 1952, p. 25.

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