| 摘要 |
PURPOSE:To shorten restoration time when insulation drop occurs by separately monitoring an insulation drop of each insulation part with a resistor or fuse, and opening or closing a circuit with a switch for the resistor. CONSTITUTION:A gas manifold 2 and a water manifold 4 are electrically connected to a lower fastening plate 3 separately through each resistor 10 and switch 11, and a tie rod 5 is electrically connected to the plate 3 through a fuse 7. Both ends of the resistor 10 and the fuse 7 are monitored by a voltmeter, and a system is programed so as to immediately stop power generation when the fuse is blow out by dielectric breakdown of an insulation part in the tie rod 5. When insulation drop occurs, by turning off the switch 11, leak current is estimated, and based on the current value, power generation is stopped when the insulation drop is continued for a specified time or longer. When insulation is restored by its own ability, power generation stop becomes unnecessary, and even when restoration is necessary, since insulation drop part can be identified, restoration time is shortened. |
