High voltage, high-current power cable termination with single c

Details High voltage, high-current power cable termination with single c High voltage, high-current power cable termination with single c

1992-12-28

1995-04-11

Picard, Leo P.

Electricity: conductors and insulators

Conduits, cables or conductors

Combined

174 19, 174143, H02G 1530, H02G 15072

Patent

active

054060303

ABSTRACT:
A high voltage cable termination for connecting a high voltage cable of the type having internal and external electric fields to other apparatus, such as an overhead line, is provided. An insulating shell surrounds the cable which is provided with a high voltage conductor surrounded by a cable dielectric. The termination includes a common condenser assembly for grading the electric fields of the cable which assembly includes a cylindrical condenser stack of restricted length surrounding the high voltage conductor to grade the internal longitudinal electric field in the dielectric surrounding the high voltage conductor. In one embodiment, the common condenser assembly includes conductive shields connected between the condenser stack and the insulating shell to grade the external electric field along the insulating shell and in the surrounding environment by tapping different voltages produced along the condenser stack to locations along the insulating shell. In another embodiment, the conductive shields are omitted and the condenser elements of the condenser assembly are axially distributed and separated by conductive segments.

REFERENCES:
patent: 2912480 (1959-11-01), Johnston et al.
patent: 3193712 (1965-06-01), Harris
patent: 3673305 (1972-06-01), Mashikian et al.
patent: 4179582 (1979-12-01), Garcia
patent: 4228318 (1980-10-01), Selsing
patent: 4262318 (1981-04-01), Shirakawa et al.
Electrical World (EHV Cable Systems) May 1, 1961, p. 52.

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