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A termination for a superconducting power transmission line is disclosed which is comprised of a standard air entrance insulated vertical bushing with an elbow, a horizontal cryogenic bushing linking the pressurized cryogenic cable environment to the ambient temperature bushing and a stress cone whi

A termination for a superconducting power transmission line is disclosed which is comprised of a standard air entrance insulated vertical bushing with an elbow, a horizontal cryogenic bushing linking the pressurized cryogenic cable environment to the ambient temperature bushing and a stress cone which terminates the cable outer shield and transforms the large radial voltage gradient in the cable dielectric into a much lower radial voltage gradient in the high density helium coolant at the cold end of the cryogenic bushing.

대표청구항 ▼

A termination vacuum enclosure (32) enclosing a cryogenic bushing (60), a portion of a superconducting power transmission cable (21) that is effective to transmit electrical power from a cryogenic region through said bushing to a region having a higher temperature, and a coolant filled pressure vess

A termination vacuum enclosure (32) enclosing a cryogenic bushing (60), a portion of a superconducting power transmission cable (21) that is effective to transmit electrical power from a cryogenic region through said bushing to a region having a higher temperature, and a coolant filled pressure vessel (50) that is operably mounted within said vacuum enclosure, said enclosure and enclosed components being characterized by the improvements comprising: (a) current carrying means (52) disposed within said pressure vessel and operable to conduct electric current from an outer conductor (16) that is disposed around the cable (21) to an outer conductor assembly (70) mounted around a temperature transition section (86) of said bushing (60); (b) a stress cone (54) disposed around a portion of said cable (21) and coaxially positioned within in and radially spaced from said current carrying means (52), said stress cone being electrically connected to said current carrying means (52); (c) a connector assembly (56) that is disposed within said pressure vessel (50), between said stress cone (54) and said bushing (60), and being effective to electrically connect an inner conductor (14) of the cable (21) to an inner conductor assembly (80) of the bushing (60); said connector assembly having an opening that is effective to enable coolant within the pressure vessel (50) to communicate with said inner conductor (14) of the cable (21); and (d) a conically shaped cold end extension (92) and a conically shaped warm end extension (94) on opposite ends of said bushing (60), said cold end extension (92) being mounted within the said pressure vessel (50) and in leak tight sealing relationship with a flange (72) on the pressure vessel 50, said warm end extension (94) being mounted outside of vacuum enclosure (32) in said region of higher temperature, and in sealing relationship with a second flange (74) on said vacuum enclosure (32).