Measuring end of a three-phase motor

(1) First identify the two ends of the three-phase winding. The multimeter is adjusted to the resistance file for measurement, where the coils of the same phase are connected without resistance, where the coils that are not of the same phase are not connected, so according to the multimeter, it can be distinguished that the two wire ends belong to the same phase winding lead wire.
(2) Identify the end of the same name of the coil lead wire on both sides, adjust the pointer multimeter to the DC current file with the smallest range, and then connect the two wire terminals of the winding of any phase to the meter, and then the two wire ends of the winding of the other phase together instantly touch the positive and negative poles of the dry battery, and if the needle swings to the side greater than zero (that is, swings clockwise) at the moment when the dry battery and the coil are connected, the positive terminal of the battery and the black pen of the multimeter are the end of the same name, and the reverse is reversed.