Causes of Tripping or Motor Burnout After Pump Startup

The causes of tripping and motor burnout after pump startup are as follows:

1. First, check the pump's rotating parts for flexibility. If there is friction, eliminate it.

2. Measure the pump's outlet pressure and slurry specific gravity, and calculate the actual operating head. If the head is lower than the specified head, the pump's operating point is biased towards high flow. This can be addressed by reducing the pump's head by trimming the impeller or reducing the pump speed. Alternatively, control valves or other flow control components can be used to increase the pipeline head, bringing the operating point back to the specified level.

3. If the pump's operating point meets the specified parameters but the motor is still overloaded, this indicates insufficient motor power or a quality issue. The motor should be repaired or replaced. Slurry pump manufacturers specifically point out that when using a frequency converter for speed control, the power of the motor and pump at the actual operating point must be calculated.