The centrifugal pump is not overloaded and is operating normally – why is there an overcurrent?
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Can a clogged inlet filter cause overcurrent?
Is the pump rotating properly, or has the density of the medium being pumped increased?
Overcurrent can be caused by the following: single-phase fault in the motor (short circuit), mechanical jamming, excessive flow rate, or too high medium density (excessive impurity content). Disassemble it to check if the impeller has fallen off.
How do you know the pump load isn’t exceeded? Either there is a problem with the pump or with the motor; please diagnose it. If it is indeed a motor issue, blockage at the inlet will only cause vacuum to be created, and it will not lead to overcurrent in the motor
I’ve encountered this before, but I didn’t observe any current; however, I think it shouldn’t cause an increase in current. Because the process conditions of the outlet pipeline have not changed, nor has the motor changed. However, any form of jamming will lead to an increase in current, such as insufficient lubrication of the motor bearings, friction between the rotor and stator, or the presence of foreign objects inside the pump
Higher medium density, excessive flow rate, mechanical jamming, and damaged motor bearings.
A blockage at the inlet of the centrifugal pump will not cause overcurrent; first determine whether it is a problem with the motor or the pump itself
A clogged inlet filter won’t cause overcurrent; it will only lead to issues like the pump running dry or excessive vibration. You can check whether the pump is too small, or there are electrical issues with the motor itself.
A clogged inlet filter does not cause overcurrent; overcurrent is caused either by problems with the design of the pump’s impeller, mechanical blockages, an increase in the density of the medium, overly tight packing, or faults in the motor itself.
Our unit has a centrifugal pump, and it too experiences motor overload and overcurrent. When the pump was turned by hand, it moved very smoothly; I thought it was due to the motor, but even after replacing several motors, overcurrent continued to occur. Later, when the water pump was disassembled, it was found that the impeller was perforated; the problem was resolved after replacing it with a new rotor
If material properties, mechanical resistance (including blockages caused by foreign objects in the impeller), and issues with the motor itself are ruled out, it is likely that the efficiency of the pump is too low, resulting in a limited overload capacity for the motor; in such cases, choosing a motor of a larger size can solve the problem.