1769-OB16P模块
1769-OB16P在条件较差的地区,也可自装手动Y-△降压启动控制线路,见图12。按下启动按钮SB1时,KM1得电,其常开触点闭合,KM3得电,常闭触点断开,常开触点闭合,电动机绕组接成Y形降压启动。当转速达到(或接近)额定转速时,按下SB3按钮,使KM3失电释放,KM2得电吸合,电动机由Y形接法转换成△形接法。这种控制线路适用于55kW以下、13kW以上的△形接法的电动机。
1769-OB16P
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