| 摘要 |
<p>PURPOSE:To make an excess space in the transverse direction inessential by a method wherein lightning arresters for two sets of three-phase main buses constituted of complex buses are installed at respective bus communication units which connect the main buses. CONSTITUTION:A main bus la in a first set is connected to a second main bus 2a via a branch bus 17a, a bus-side disconnector 18a, a breaker 19a, a bus-side disconnector 20a, a bus 21a and a branch bus 23a. One end of a lightning arrester 4a is connected to the branch bus 17a, and the lightning arrester 4a is arranged so as to be situated at a first main bus 1b. One end of a lightning arrester 5a is connected to a main bus 2a in a second set via a connection bus 24a and the branch bus 23a. In the same manner, one end each of lightning arresters 4b, 5b are connected to another bus communication unit 15b, and one end each of lightning arresters 4c, 5c are connected to a bus communication unit 15c. As a result, the length of the main buses in the first and second sets can be reduced, and the installation area of a gas-insulated switchgear can be reduced.</p> |
