| 摘要 |
PURPOSE:To cut off a power unit so as to prevent independent operation when a power supply system stops power supply by providing a carrier harmonic wave transmitting means which sends a carrier harmonic wave signal when the power failure information of the power supply system is inputted and a carrier harmonic wave receiving means which gives a cut-off command to a circuit breaker for interconnection when carrier harmonic waves are inputted through a power distributing system. CONSTITUTION:AC power obtained from a power unit is supplied to a power distributing system 7 through a circuit breaker 4 for interconnection. A power supply system 5 which supplies electric power to the system 7 is constituted in such a way that its cable way can be cut off by means of a switch 6. A carrier harmonic wave transmitting section 9 generates carrier harmonic waves and sends the waves to the system 7 when the opening information of the switch 6 is inputted. A carrier harmonic wave receiving section 10 gives a cut-off command to the circuit breaker 4 upon receiving carrier harmonic waves transmitted from the section 9 through the system 7. Therefore, when the power supply from the power supply system to the power distributing system is cut off, the power unit which is in an operating state can be cut off from the power distributing system in an interlocking way. |
