| 摘要 |
PURPOSE:To prevent the inertial energy of an MG set from being consumed by electric loads other than the load connected to the MG set. CONSTITUTION:A bus 3 is connected to a power source 1a and an alternate power source 1b via power receiving circuit breakers 2a, 2b. Electric loads 9a,..., 9z and the induction motor 6a of an MG set via a circuit breaker 4 are connected to the bus 3, and a load 7 is connected to the generator 6b of the MG set. When the circuit breakers 2a, 2b are opened, they are detected by detectors 11a, 11b respectively, an AND circuit 12 judges that both detectors 11a, 11b detect the opening of the circuit breakers 2a, 2b, and a time limit circuit 13 outputs an instruction 14 to a circuit breaker circuit 15 when the judged result is continued for a prescribed period. When the circuit breaker circuit 15 receives the instruction 14, it releases the circuit breaker 4 to cut off the MG set from the bus 3. The inertial energy of the MG set to be consumed by the load 7 can be prevented from being consumed by the electric loads 9a,..., 9z. |
