Slotted line road (see the graph shows) 1 times, be in namely electric current either pole and easy measure between the metallic component that touchs. When measuring leak electric current, to single-phase electromotor, answer to change switch K to the different polarity of power source, to three-phase electromotor, should disconnect by turns one of switch of A, B, C, close additionally two, with be being measured the most greatly leak electric current is worth.
When measuring, electromotor must be isolated from with the earth.

8 insulation resistance and interpose report intensity
8.1 electromotor should have enough insulation resistance and interpose report strength, its ask to should accord with the regulation of GB 5171.

9 damp and hot experiment
9.1 electromotor should experience the appears possibly damp condition in be being used normally.
Whether to accord with a requirement, answer to undertake by GB 5171 experiment of damp and hot decides.

10 wear
Design of 10.1 electromotor structure should consider in be being used normally, do not happen have the electric or mechanical accident that damages electromotor, insulation does not get damage, connection must not wait for a reason as a result of be heated, vibration and become loose
Whether to accord with a requirement, should press 10.2-40.5 undertake experimenting checking deciding.
10.2 electromotor press the time that the watch shows 1 times, regular job leaves with 1.1 times rated voltage in rated load, next, press the time that the watch shows 1 times, regular job leaves with 0.9 times rated voltage in rated load.