Multi-circuit switch gear

Details Multi-circuit switch gear Multi-circuit switch gear

1997-12-29

1999-07-06

Donovan, Lincoln

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Vacuum

218139, 218152, H01H 3366

Patent

active

059200529

ABSTRACT:
A multi-circuit switch gear includes a main body filled with an insulation gas, main bushings mounted on a front portion of the main body, a plurality of three-phase input/output units connected to the main bushings, multi-position switching devices disposed inside the main body for switching between a turn-on state, a turn-off state, and an earthed stated, automatic contact devices disposed at a front surface portion of the main body, earth bushings mounted on the respective side portions of the input/output units, moldcone connection members coupled to the earth bushings, and earth terminals connected to the moldcone connection members. The multi-circuit switch gear allows a current discharge operation to occur in the insulation gas provided in the main body during the earthing operation, thereby increasing workers' safety and facilitating an insulation test via the connection members with regard to the underground insulation cable.

REFERENCES:
patent: 3551587 (1970-12-01), Propst
patent: 3947650 (1976-03-01), Strain et al.
patent: 4798922 (1989-01-01), Roberts
patent: 5508486 (1996-04-01), Spack et al.
patent: 5600112 (1997-02-01), Opfer

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