| US 7,515,398 B2 | ||
| Gas-insulated switchgear assembly | ||
| Hiroshi Takao, Kanagawa (Japan); Masayuki Fukunaga, Kanagawa (Japan); and Reiji Ohara, Kanagawa (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan) | ||
| Filed on Mar. 21, 2006, as Appl. No. 11/384,424. | ||
| Claims priority of application No. 2005-081126 (JP), filed on Mar. 22, 2005. | ||
| Prior Publication US 2006/0215356 A1, Sep. 28, 2006 | ||
| Int. Cl. H02B 1/20 (2006.01) | ||
| U.S. Cl. 361—612 [361/602; 361/605; 218/75; 218/79] | 6 Claims |
| 1. A gas-insulated switchgear assembly for three-phase alternating current transmission comprising, for each phase:
a first disconnecting switch connected to a first main bus bar;
a first circuit breaker connected to the first disconnecting switch;
a second disconnecting switch connected to the first circuit breaker;
a third disconnecting switch connected to the second disconnecting switch;
a second circuit breaker connected to the third disconnecting switch;
a fourth disconnecting switch connected to the second circuit breaker;
a fifth disconnecting switch connected to the fourth disconnecting switch;
a third circuit breaker connected to the fifth disconnecting switch;
a sixth disconnecting switch connected to the third circuit breaker on an end and to a second main bus bar on another end;
a first connecting bus bar branched off and connected between the second disconnecting switch and the third disconnecting
switch, the first connecting bus bar connected to a first feeding line; and
a second connecting bus bar branched off and connected between the fourth disconnecting switch and the fifth disconnecting
switch, the second connecting bus bar being connected to a second feeding line, wherein:
the first, second and third circuit breakers are arranged in such a manner that longitudinal axes thereof are in parallel
with one another in one horizontal plane, the first, second and third circuit breakers for different phases being arranged
side by side with one another; and
the first main bus bars and the second main bus bars are arranged horizontally and in parallel with each other at a height
different from a height of the horizontal plane including the longitudinal axes of the circuit breakers and in a direction
different from the direction of the longitudinal axes of the circuit breakers;
at least two out of the first, second and third circuit breakers are shifted in a lateral direction, and are arranged so as
to be partially overlapped in the longitudinal direction;
the first disconnecting switch is arranged in a straight line with the first main bus bar; and
the sixth disconnection switch is arranged in a straight line with the second main bus bar.
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