| 摘要 |
PURPOSE:To cut off a voltage simultaneously with the breakdown of an electric field curtain and to secure safety by providing a measuring means, etc. which measure the current flowing through each electrode group, a detecting means which detects whether there is a difference between outputs of the measuring means, etc. CONSTITUTION:Current measuring circuits 26a and 26b are interposed respectively in connection lines which connect terminals 17 of two electric field curtain devices 10a and 10b to a power terminal 20, and output terminals of the current measuring circuits 26a and 26b are connected to a control circuit 27. In such a constitution, the voltage is cut off right before or at once an eletric field curtain device breaks down to suppress discharge energy generated at the breakdown point, securing the safety. |
