POWER SUPPLY SYSTEM AND CONNECTION METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To reduce leakage current caused by earth electrostatic capacitance. SOLUTION: The power supply system outputs the outputs of a plurality of non-insulated inverters 2a-2n to single-phase three-wire AC power system 3, wherein switches 10-12 are changed to distribute outputs of inverters 2a-2n to two non-grounded wires so as to reduce the potential of a single-phase three- wire neutral conductor 3N and minimize the difference between electric powers respectively outputted to two non-grounded wires 3U and 3V.