星三角启动不了，按下启动，第一个接触器不动，第三个有吸合。手动按下第一个线圈三个接触器同时吸合，电机也转。关掉负载一并线220V，也是的。请教各位？

　　星三角启动不了，按下启动，第一个接触器不动，第三个有吸合。手动按下第一个线圈，第三个接触器同时吸合，电机也转。关掉负载，第一个接触器并线220V，也是吸合的。请教各位？

　　根据问题描述，应该检查km1线圈和到km1a1的线，给你个简易图，自己看吧

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　　你说的不清楚。最先接触的接触器应该是星型连接的那个，然后是一个两种方式都吸合的那个，通常这个是2号，然后时间到切换到三角形，就是2和3接触器两个吸合，和最先吸合的没有关系了！

　　建议你查一下你的电路和图纸是否一致！