| 摘要 |
PURPOSE:To prevent an overload operation by providing a load breaker for selecting a load to be cut-off and a selecting and cutting-off state display lamp of a load to be disconnected at the time of separating a system if a non-utility generator facility is separated from an electric power company. CONSTITUTION:Power is received from an electric power company system 1 by a power receiving breaker 4, and a non-utility generator facility 2 is connected to a power distribution bus 18 via a generator breaker 16. Protective loads 11 and 12 are connected to breakers 7, 8, and selectively breaking loads 13, 14 are connected to breakers 9, 10. The breaker of a selectively cut-off state lights a selectively cut-off state display lamp 21, and the breaker of a trip blocking state lights-off a selectively breaking display lamp 22. An operating state is confirmed by a monitoring instrument 30. Thus, a selective breaking circuit is formed of a trip block switch. When the number of circuits is increased, an operator can judge the lamp, and hence an overload prevention of the facility can be effectively decided. |
