Analysis of the high self-starting current in centrifugal pumps
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I would like to ask: why is the current high after the standby pump starts operating? The pump that was in use before is basically not working at all. How can this be explained?
Personal opinion: The main pump has experienced wear and reduced efficiency due to long-term operation； The standby pump has a short operating time, is in good condition, and has a higher efficiency than the main pump; therefore, its operating current is on the higher side ； When both pumps are turned on at the same time, the head pressure of the standby pump is higher than that of the main pump, preventing the main pump from pumping out the fluid ；