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严寒的环境条件对电机的不良影响主要有以下三方面:
(1)低温使绝缘材料发硬变脆,容易开裂;
(2)导线的接头如有焊锡,低温条件下会使焊锡呈粉末状;
(3)低温时轴承的润滑脂会冻结发硬,使电机不能起动。
因此在起动前应将电机加热保温,使其温度不致过低,并对绕组及轴承进行检查,经采取上述措施后,方可起动。
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