The pump light has stopped working – what could be the reason?
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We have a hot oil pump, which is a centrifugal pump, and it doesn’t have any interlocks. Once we start it up, by opening the outlet valve wide, the outlet pressure of the pump will drop to around 0.1–0.2 MPa, and then it will stop. Could everyone help analyze it?
It’s possible that there’s no time available; there’s fever, and the current level is so high that it causes the system to shut down abruptly.
If turning the pump shaft is no problem, then it’s a motor issue
Will there be an impact if I take some time? It won’t cause an immediate shutdown
The current is too high, so the motor protection system shuts it down.
The outlet valve is opened too wide; a flow-limiting orifice should be installed at the outlet
If there are no issues with the process, please check whether the settings and selection of the air switches in the power distribution room are appropriate
Thank you all. We didn’t pay attention to the current level. When trying again today, have MCC (motor power supply) pay attention to it. I also want to ask whether this over-current protection is a built-in protection feature of the motor? Is it part of high-voltage control?
Why is the current too high when there is a load?