一、电动机的火灾和预防电动机在运行时,可能有线圈发生过热的情况,烤焦绝缘材料甚至引起燃烧。电动机因过负荷而引起的过电流,通常是由于被拖动的机械过载,或电网的电压降低使电动机的转速减小时,从电网所吸取的电流增加,或电动机的电源回路中有一相断线时,电动机转速减低,而在其余的二相中,电流将比正常工作时的电流约增加1.7～1.8倍所造成的。电动机长朗过负荷,势必引起 First, the motor and fire prevention Motor in operation, the coil may be overheating, burned insulating materials and even cause combustion. Motor overload due to overcurrent, usually due to drag the mechanical overload, or the grid voltage is reduced so that the motor speed decreases, the current drawn from the grid increases, or the motor power circuit has a phase disconnection , The motor speed is reduced, while in the remaining two phases, the current will be about 1.7 to 1.8 times higher than the normal operating current. Motor overload, is bound to cause