Vacuum insulated switchgear

A vacuum insulated switchgear comprising:

• a busbar compartment, in which phase-segregated double-break, three-position vacuum circuit breakers are disposed;
• feeder compartments disposed at both sides of the busbar compartment respectively, in each of which phase-segregated double-break, three-position vacuum circuit breakers are disposed, with the busbar compartment and the feeder compartments being aligned in a row;
• a first-phase insulated busbar disposed to connect one of fixed contacts of a first-phase breaker in the busbar compartment to a fixed contact of a first-phase breaker in one of the feeder compartments adjacent to the busbar compartment through a first connector;
• a second-phase insulated busbar disposed to connect one of fixed contacts of a second-phase breaker in the busbar compartment to a fixed contact of a second-phase breaker in one of the feeder compartments adjacent to the busbar compartment through a second connector;
• and
• a third-phase insulated busbar disposed to connect one of fixed contacts of a first-phase breaker in the busbar compartment to a fixed contact of a first-phase breaker in one of the feeder compartments adjacent to the busbar compartment through a third connector,
• wherein the second connector is longer in length than the first connector, the second connector is disposed at a lower position than the first-phase insulated busbar, and the third connector has a length which is the same as the first connector or the second connector and is disposed at the same height as the first-phase insulated busbar or the second-phase insulated busbar.