| 摘要 |
PURPOSE:To obtain a tap switching device with simple constitution and high reliability by providing the 3rd tap selector which has an output via a semiconductor switch between two tap selectors, and detecting the voltage among those selectors to perform the open/close control. CONSTITUTION:The 1st and 2nd tap selectors 54 and 55 are connected to an output from a voltage tap 52 provided to a tap winding 51 via voltage limiting elements 57 and 58. The 3rd tape selector having an output via a semiconductor switch 59 is provided between both selectors 54 and 55. Then the 1st and 2nd voltage detectors 61 and 62 are provided among those 1st-3rd tap selectors respectively. The detection outputs of these detectors 61 and 62 controls the open/close of the switch 59 via an ignition controller 65 and an ignition device 67. |
