| 摘要 |
PURPOSE: A device for optimizing an emergency power source for a high frequency power line and a method thereof are provided to reduce a noise being generated in a neutral line from an emergency power source being used with a general power source in common by a filter circuit and solve a damping of a high frequency signal for a communication caused by an emergency circuit breaker effectively for performing a high frequency power line communication stably using an emergency power source. CONSTITUTION: A three-phase power line of an emergency power source(12) is connected to an internal emergency generator. A neutral line of the emergency power source(12) is connected to a general power(10) in common. If a power failure happens, an internal emergency generator of the emergency power source(12) is operated after a predetermined time passed. According as an automatic switching switch(14) is switched from the general power(10) toward the emergency power source(12), an emergency power source from the emergency power source(12) is supplied to a specific plural electric power loads(LD1-LDn) as an elevator or a feed water pump through a plurality of fuses. According as the neutral line being applied from the emergency power source(12) is used with the general power(10) in common, a separation filter circuit(18) filters a high frequency noise component for breaking an introduction of a high frequency noise being generated from an electric power load through the neutral line.
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