Power failure detection system and power failure range determination method

摘要

PROBLEM TO BE SOLVED: To provide a blackout detection system capable of deciding a power failure cause without dispatching a maintenance staff to an unmanned facility, and to provide a blackout area decision method by which a power failure area can be totally decided by using the blackout detection system.SOLUTION: A light emitting apparatus 11 that emits light on detection of a commercial voltage is installed on the secondary side of a watt-hour meter 1. A light receiving apparatus 12, connected to the light emitting apparatus 11 through an optical cable 13, is installed in a communication building. On the basis of the output signal of the light receiving apparatus 12 and the output signal of a built-in undervoltage relay of an uninterruptive power supply 5 installed in the communication building, a blackout decision apparatus 14 decides whether the power failure cause is on the distribution line side or the facility side, and outputs decision result data indicative of the decision result to a monitoring apparatus 7. The monitoring apparatus 7 transmits the decision result data to a remote monitoring center.