High voltage, high-current power cable termination with single condenser grading stack

A high voltage cable termination for an insulated high voltage cable of the type having internal and external electric fields, the high voltage cable termination comprising:

• a high voltage conductor and an insulating shell surrounding the conductor;
• and
• common condenser means including a cylindrical condenser stack of restricted length surrounding the high voltage conductor which grades the internal electric field in a dielectric surrounding the high voltage conductor, and conductive shields connected between said condenser stack and said insulating shell to grade the external electric field along said insulating shell and in a surrounding environment, said conductive shields being formed of a plurality of generally conical shields whose electrical potentials are defined by the grading of said condenser stack and wherein each of said conical shields taps a proportionate different voltage produced along said condenser stack to locations along said insulating shell so as to grade the external electric field.

A high voltage cable termination for an insulated high voltage cable of the type having internal and external electric fields, the high voltage cable termination comprising:

• a high voltage conductor and an insulating shell surrounding the conductor;
• and
• a cylindrical condenser stack of restricted length surrounding the high voltage conductor for grading the internal electric field in a dielectric surrounding the high voltage conductor and for grading the external electric field along said insulating shell and in a surrounding environment, said cylindrical condenser stack being comprised of plural condenser elements formed of ceramic to produce a generally continuously changing potential therein and distributed along said high voltage conductor and spaced apart longitudinally from each other by conducting segments.

A high voltage cable termination for an insulated high voltage cable of the type having internal and external electric fields, the high voltage cable termination comprising:

• a high voltage conductor and an insulating shell surrounding the conductor;
• a dielectric providing surrounding insulation for the conductor;
• and a common condenser stack for grading electric fields produced by the conductor, said condenser stack being cylindrical and of restricted length surrounding the high voltage conductor to grade the electric field within said dielectric, and conductive shields connected between said condenser stack and said insulating shell to grade the external electric field between said insulating shell and surrounding environment, said conductive shields being formed of a plurality of generally conical shields whose electrical potentials are defined by the grading of said condenser stack and wherein each of said conical shields taps proportionate different voltages produced along said condenser stack to a respective location along said insulating shell so as to grade the external electric field.

A high voltage cable termination for an insulated high voltage cable of the type having internal and external electric fields, the high voltage cable termination comprising:

• a high voltage conductor and an insulating shell surrounding the conductor;
• and
• a cylindrical condenser stack of restricted length surrounding the high voltage conductor for grading the internal electric field in a dielectric surrounding the high voltage conductor and for grading the external electric field along said insulating shell and in a surrounding environment, said cylindrical condenser stack being comprised of plural condenser elements formed as respective stack layer film condensers to produce a generally continuously changing potential therein and distributed along said high voltage conductor and spaced apart longitudinally from each other by conducting segments.