| 摘要 |
<p>PURPOSE:To continue the supply of electric power by a method wherein, even when a transmission-line branching distribution system is adopted, a fault point can be cut off immediately from the part of a cutting-off device in a branch- point part and other healthy systems are utilized immediately. CONSTITUTION:Transmission lines 4 to 6 are drawn out from individual substations A to C via breakers 1 to 3, and the transmission lines 4 to 6 are multipoint-connected at a branch point P. The branch point P is included in a branch-point part 16 constituted of a gas-insulated switchgear. The gas- insulated switchgear constituting the branch-point part 16 is provided with bushings 7 to 9 which pull the individual transmission lines 7 to 9 into the gas-insulated swithgear, and cutting-off devices 10 to 12 are installed between the individual bushings 7 to 9 and the branch point P. Grounding devices 13 to 15 and current transformers 17 to 19 are arranged and connected on the side of the transmission lines of the cutting-off devices 10 to 12.</p> |
