| 摘要 |
PROBLEM TO BE SOLVED: To avoid instantaneous voltage drop and the stop page of important load equipment in power failure, without increasing facility cost. SOLUTION: This control device is provided with a first bus B, where power is supplied from a power supply with high supply reliability and an importance load with high degree of importance is connected and a second bus A that is connected to the fist bus via a circuit breaker CB3, while a general load with low degree of importance factor is connected and power is supplied from a power supply with low supply reliability. Furthermore, at a control part 20 for continuing important load operation, the control device is provided with a fault detection part for detecting a fault, based on the output of a current- measuring device CT3 being provided between the first and second buses B and A, and a circuit breaker control part for separating bus that releases the circuit breaker CB3, in the case of the fault of a power supply side with low supply reliability based on the detection result of the fault detection part. |
