QJ3 series of manually operated auto-voltage start-up circuit


Posted on Mar 28, 2007

Circuit shown in Figure 3-47. Close the power switch os, operating handle to push the start position, then three-phase AC motor is connected through a step-down autotransformer


QJ3 series of manually operated auto-voltage start-up circuit
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after. To be started is completed, the operating handle to pull the Run position, autotransformer voltage regulator out of operation, the motor directly connected to the three-phase power supply for full voltage operation. At this time the trip coil is energized YR station, keeping the operating handle in the operating position by the interlocking mechanism. When stop, press the stop button SB can.




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