| 摘要 |
<p>PURPOSE:To continue supplying of an electric power to a load by opening a high speed AC breaker provided between an inverter circuit and a load when an inverter becomes defective and supplying electric power from other effective inverter to the load. CONSTITUTION:An inverter circuit 10 inputs from a pantograph 11 a DC electric power, and supplies its output to a load 13 through a high speed AC breaker 12. When the output voltage of the inverter 10 is eliminated, the output from a voltage detector 14 is inputted to the breaker 12. Then, a defect signal of the inverter 10 is inputted to the breaker 12. The breaker 12 is opened by these signals. At this time a DC power is supplied from an inverter circuit 15 to the load 13. The inverter 15, a high speed AC breaker 17, a load 18 and a voltage detector 19 similarly operate.</p> |
