Motor trip site
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A centrifugal pump motor trips when in operation, and trips again when restarted. What could be the possible reason for this phenomenon?
From a technical perspective, tripping during the acceleration phase of the motor at startup may be caused by an excessive load. For example, if the outlet valve is opened too wide (except for liquids at unsaturated temperatures), it should be closed completely, and operation should be started with the lowest possible load. Or it could be due to excessive material quality, mechanical damage resulting in excessive axial force, etc. Electrical issues may be due to single-phase problems or other reasons as well. If it closes, it trips immediately. The electrical aspect is more likely. First, conduct a preliminary check through tasks such as turning the shaft.
Start with the valve closed, and open it after operation begins
Slowly open the outlet valve, measure the immediate current, and check the electrical system to see if the protection setting is too low
First, rule out the influence of operating conditions to see if it is overloaded.
Check the machinery first, then the circuit, and finally the operating conditions.
There is a high likelihood of problems with electrical relay protection. You mean the vehicle jumps out as soon as it starts; there’s probably a problem with the electrical protection system. During the startup of the motor, a high current is generated; therefore, standard protection settings will avoid this period, and the overload protection will only come into effect once the operation has stabilized.
It trips as soon as it starts up, which means there’s an overcurrent. Have the electrician measure the current to see where the problem lies.