The abnormal sound of a three-phase machine
The driving load has mechanical noise. And if you look at it carefully, A: I don't understand. Is this a three-phase machine? If yes, the wiring problem!
?motor overload, a simple judgment method: monitoring station comparing with other motor current motor current, if the station motor current is big, that motor overload phenomenon exist;
First rule out the factors of lack of phase, because motor open phase, a few seconds can be burned motors. In this case, there are several possible: 1, the motor winding fault, lead to motor disorder, internal magnetic field should be quickly find out the reason, simple method is to check the motor phase current balance
