| 摘要 |
PURPOSE:To detect full open and full close with a simple connection structure by detecting that a current passed through a motor is cut off with a current detector, confirming full open or full close, and indicating on an indicator. CONSTITUTION:When a user tries to open an electrically driven switching device 6, the information is entered to a controller 16, relays 20 and 21 are driven, and a current is passed through a motor 7 in an opening direction. A current detector 24 detects the current and transmits the information to the controller 16. The controller 16 indicates 'Under opening' on an indicator 22 while the current detector 24 detects the current. When an open limit switch 9 is opened after full open, no motor current is passed. When the current detector 24 detects that and transmits the information to the controller 16, 'Full open' is indicated on the indicator 22. Similarly, in closing, when a close limit switch 10 is operated and a current is cut off, 'Full close' is indicated. |
