Title:
アーク炉の表示灯制御装置
Document Type and Number:
Japanese Patent JP5772320
Kind Code:
B2
Abstract:
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.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.
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Inventors:
Hanamatsu Masayoshi
Application Number:
JP2011154109A
Publication Date:
September 02, 2015
Filing Date:
July 12, 2011
Export Citation:
Assignee:
Toshiba Mitsubishi Electric Industrial Systems Co., Ltd.
International Classes:
H05B7/148
Domestic Patent References:
| JP59099694A | ||||
| JP2006085936A | ||||
| JP4142811A | ||||
| JP57178395U |
Attorney, Agent or Firm:
Mamoru Takada
Hideki Takahashi
Hideki Takahashi