How to use AC clamp meter measuring motor is good or bad?
First, open the connecting piece of star or triangle connection, and measure whether the resistance of the three-phase winding U1U2, V1V2 and W1W2 is the same, and the normal three-phase resistance value of the motor should be basically the same;
Finally, we should also pay attention to, in the power operation, listen to the motor noise is large, after running for some time, touch the motor head cover, bearing parts and shell temperature rise is too fast too high.After this series of checks, and finally can basically determine the quality of an electric motor.
Then, according to the original star or delta connection reduction operation current clamp meter measuring three-phase windings of electricity load, should not exceed the nameplate current value, the no-load load should not exceed 20%-50%, three-phase current should be basically the same, the maximum unbalance current does not exceed the average value of 10%;
Then, using AC clamp meter measuring three-phase windings U1U2, V1V2, and W1W2 phase between the insulation resistance of the shell, can be in more than 500 billion in europe;
