| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electricity distribution system for safely supplying the power using DC power from a DC power supply and AC power from an AC power supply without increasing the size of the system, which reliably performs leakage detection by switching between the middle point grounding at the AC side and the middle point grounding at the DC side. <P>SOLUTION: The electricity distribution system includes an AC distribution section and a DC distribution section. The AC distribution section has a first leakage detection section that detects a leakage current in an AC power feeding path by using neutral line grounding as a reference potential. The DC distribution section has: a non-insulated DC-AC converting section that converts a DC current into an AC current; a middle point grounding section which has a grounding portion at middle potential point in the DC power feeding path and is connected to the DC-AC converting section; a second leakage detection section which is connected to the DC-AC converting section or the middle point grounding section and detects DC current leakage current in the DC power feeding path using the grounding of the middle point grounding section as the reference potential; and a grounding switching section that switches the grounding of the middle potential point of the middle point grounding section. <P>COPYRIGHT: (C)2013,JPO&INPIT |
