How is the motor protected from overcurrent when a centrifugal pump starts automatically?
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Now, consider a project where the client requires that the centrifugal pump start automatically. However, according to available information, the outlet valve must be closed when the centrifugal pump starts; yet if the outlet valve remains open during automatic startup, could this cause the motor of the centrifugal pump to experience excessive current and get damaged?
The outlet valve began to close in order to fill the pump. Is there an automatic control valve in front of the pump? First, open the valve in front of the pump to ensure that the pump can be filled, then start the pump and open the outlet valve after a delay.
Star angle, soft start, or variable frequency. If the load is not high, it doesn’t have much of an impact; it’s fine to start and stop it near the mouth. If the load is high, then use star-delta connection, soft start, or frequency conversion control. But I’m worried that your pump impeller might be subjected to shock when the machine stops, which could damage the impeller. Check valves are useless too; I have experience with that: lol