Back to results
US 2003/0141281 A1Published application
Gas-insulated switchgear
AssigneeHitachi, Ltd.
InventorsMamoru Okabe, Hitoshi Yamada, Toshihisa Miyamoto, Isamu Ozawa
Life of this patent
Estimating the term…
Abstract
A gas-insulated switch gear has a plurality of bay units having bus ducts each containing a three-phase bus and connected by bellows expansion joints. When the bay unit needs to be inspected for maintenance, the bellows expansion joints are compressed, and only the bay unit can be pulled out of the gas-insulated switchgear.
Claims5
A gas-insulated switchgear comprising:
- a first three-phase bus, a second three-phase bus, and a plurality of circuit breakers;
- wherein bay units are formed for the circuit breakers, respectively,
- each bay unit is provided with bus ducts containing the first and the second three-phase bus, respectively, and
- the bus ducts of the adjacent bay units are connected by bellows expansion joints, respectively.
1 more element
Dependencies are inferred from the claim text.