| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an indication lamp control device of an arc furnace capable of lighting an arc indication lamp of an operation panel in sufficient brightness even if a tap voltage is low. <P>SOLUTION: The indication lamp control device includes: a furnace transformer 1 in which an electrode 2 is connected to its secondary side; a tap selector 1a which is incorporated in the furnace transformer 1 and changes a voltage on the secondary side of the furnace transformer 1 by switching a tap position; a tap position transmission part 5 which transmits the information about the tap position of the furnace transformer 1; an arc indication lamp 10 provided to an operation panel 6; a voltage step-down means 11 which steps down a voltage on the secondary side of the furnace transformer 1 and supplies it to the arc indication lamp 10; and a control circuit 12. The control circuit 12 controls the voltage step-down means 11 on the basis of the tap position information transmitted from a tap position transmission part 5, and causes the voltage step-down means 11 to step down a voltage by such an amount as to correspond to the tap position of the furnace transformer 1. <P>COPYRIGHT: (C)2013,JPO&INPIT |
