If the stator leakage causes the stator core to live, it will not trip because it is fixed on the insulated plastic case.
If the rotor or stator windings appear turn to turn short circuit, even idling will produce very abnormal sound, commutator spark is very big, in a short while, drill will smoke.
It can be judged that the rotor leakage of the electric drill is caused by the analysis of the reason that the rotor winding is connected with the iron core of the rotor, and the rotor core is electrified by the rotor shaft and the transmission gear. When the utility model is idle and the insulation is dry, the leakage switch does not move because the earth does not generate leakage current. When drilling the non insulating material connected to the ground, the leakage current will cause the leakage switch to trip immediately.
