Motor selection for submersible pumps
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Parameters: Flow rate: 25 m3/h, Head: 32 m, Medium: sewage, Maximum depth of the medium: 3 M. Question: What capacity motor should be selected? Thank you first here O(∩_∩)O!
Hello, you need to know the efficiency of the pump; the efficiency levels vary among different manufacturers, as do the power specifications
What is the specific gravity of your wastewater?
It’s only three meters – why use an submersible pump? . It’s better to use a vertical self-priming pump. . Is it a jar or a pool? . . Vertical self-priming pumps are not that much cheaper than submersible pumps. . It has few components and is easy to maintain. .
65FY-32 Export DN50 5.5KW-2 L=3000mm
I’ve chosen a submersible pump for you. . . That’s basically the only model available
Specific gravity, density – the manufacturer will choose an appropriate motor for you
Our factory currently uses 5.5KW motors, which trip due to overcurrent under even slight load; some believe the issue lies in the insufficient power of these motors. That’s why I’m posting this.
Change it to 7. Run a test on the 5KW 2-pole motor
Then it might be superpower. . . How about trying a 7.5KW one? . The frame numbers for 5.5 and 7.5 KW are the same. . No changes are needed. It can be used right away. .
Theoretically, 5.5KW is sufficient. . . But maybe this wastewater has a specific gravity of around 1–1.1 or something like that. . Or it is the intermediate guide bearing body of the 3-meter submersible pump that consumes too much power. . That also exists. . . Replace it with a 7.5KW one. . Try the motor of V1. . .