| 摘要 |
PROBLEM TO BE SOLVED: To provide a protection system for the facilities using grid power together with private generator power, which reduces influence on the other systems, upon short-circuiting accidents. SOLUTION: The facilities using the grid power together with private generator power has a grid power bus connected to the grid power line through a first current limiter, a private power bus connected to the private power generator through a second current limiter and also connected to the above grid power bus through a third current limiter, a short-circuit accident detector to output information for showing an accident and its location upon detecting a short- circuit accident downstream of the grid power bus and the private power bus, and a control to send instruction signals to the first or second current limiter on the bus, having the accident including the third current limiter, after deciding which bus has the accident, depending on the information from the short-circuit accident detector. |
