Abstract: In order to shorten the length of connection buses and reduce a cost, in the present invention, a plurality of T-branched circuit breaker units 12 are arranged in a direction perpendicular to the T-branch direction, and the plurality of circuit breaker units 12 are connected by first connection bus units 14 and second connection bus units 15 in series alternately in a rectangular wave shape on a horizontal plane of approximately the same height as the T-branch portions of the circuit breaker units 12. Thereby, first connection buses 5 and second connection buses 6 are stretched around on the horizontal plane of the same height as the T-branch portions of the circuit breaker units 12, but not stretched around in an up and down direction. Therefore, the length of the connection buses can be reduced, and the cost also can be reduced.

Abstract: A gas insulated switchgear includes a plurality of T-branched circuit breaker units arranged in a direction perpendicular to the T-branch direction, and connected by first connection bus units and second connection bus units in series alternately in a rectangular wave shape on a horizontal plane of approximately the same height as the T-branch portions of the circuit breaker units. First connection buses and second connection buses are arranged around on the horizontal plane of the same height as the T-branch portions of the circuit breaker units, but are not arranged in an up and down direction.

Abstract: A compact-sized gas insulated switchgear accommodates components and devices constituting its line side unit into one container. Arresters and cable heads are accommodated in a lower section of the line side unit, and a circle connecting centers of respective arresters and cable heads arranged therein is concentric with a cylindrical section of the line side unit container.

Abstract: A gas insulated switchgear of the present invention, a plurality of disconnect switches are provided on a line connecting a bus line to a circuit-breaker in such a manner as to be arranged in both a main bus unit, a breaker unit or in both a first and second insulating gas sections. Accordingly, when an inconvenience occurs in the gas insulated switchgear apparatus and the exchange work of a unit is required, it is possible to exchange the inconvenient damaged unit only by turning the circuit including the inconvenient damaged unit into power supply interruption, that is, without turning a normal circuit unit into power supply interruption.

Abstract: A gas insulated switchgear includes a bus unit, a breaker unit and a line side unit. An insulating spacer structure attaching at least two of the units together includes an inner flange on a first unit, an outer flange on a second unit, and an insulating spacer positioned between the first and second units. Closed end tapped holes are formed in the inner flange and idle holes are formed in the outer flange, and tapped holes with a larger diameter than that of the tapped holes of the inner flange are formed in the insulating spacer.

Abstract: A gas insulated switching apparatus has lightning arrestors in a line side unit. Each lightning arrestor is mounted to be moved linearly into and out of connection with a corresponding conductor. Specifically, the cover which supports the lightning arrestor is disposed beneath the bottom plate of the vessel of the line side unit. The lightning arrestors are connected to a monitor of an operating device beneath the line side unit. Since the lower portion of the lightning arrestors are connected to the monitor, the length of the connection lines is made sufficiently short.

Abstract: A gas insulated switch gear has a main bus unit, a circuit breaker unit and a line unit. The line unit has a top plate with a hole through which a potential transformer is inserted into the inside of the line unit and an adapter cover fixed to the potential transformer is connected to the top plate.

Abstract: A gas insulated switchgear includes a bus unit, a breaker unit and a line side unit. An insulating spacer structure attaching at least two of the units together includes an inner flange on a first unit, an outer flange on a second unit, and an insulating spacer positioned between the first and second units. Closed end tapped holes are formed in the inner flange and idle holes are formed in the outer flange, and tapped holes with a larger diameter than that of the tapped holes of the inner flange are formed in the insulating spacer.