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根据三相异步电动机断相运行时,功率因数比正常状态低10％的试验经验,通过详细、严谨的科学分析,计算出电机在不同状态下的故障电流,确定“危险负荷区”。并讨论了辅机保护装置实现断相保护的原理。
According to the experiment experience that the power factor is 10% lower than the normal state when the three-phase asynchronous motor is off-phase running, the fault current of the motor under different states is calculated through a detailed and rigorous scientific analysis, and the “dangerous load zone” is determined. And discussed the auxiliary protection device to achieve the principle of phase failure protection.