Installing submersible well pump in wet well on pond. Need 20 gpm. Pump supply house Sized pump at 230 volt, single phase, 1hp, 3 wire with pump control box. There is 480 3 phase at location for large pump that feeds pivot system. The electrician said we need 480 volt 3 phase pump. Pump supplier said that 1hp pumps are not available in 3 phase 480 and there needs to be kick down transformer installed to 230 volt single phase. Who is correct and which way should I go?
Electrical requirements for pump
- Thread starter Corserv
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They make 1HP motors in 460V three phase, but they are not common. You can order one. However, the three phase starting panel will probably cost more than a 460X230 transformer, where you could use a regular single phase and more easily available motor.
Think of the next time it goes out? You will want something that doesn't take long to get.
Think of the next time it goes out? You will want something that doesn't take long to get.
If the pump is going to be hung vertically at a depth of about 5’in a 3’ square wet well that is approximately 10’ deep and fed from the bottom from a pond, does the pump need a flow sleeve To cool the motor? Or can it just be suspended with nothing around it?
Was planning on using 2’ piece of 4” steel well casing Welded to support at top of wet well. Drop pump and wire through casing. Pump would be hung off of 1” stand pipe at the 5’ depth from 4” well seal. Will this work or is there a better way to do this including a flow sleeve if needed?
Was planning on using 2’ piece of 4” steel well casing Welded to support at top of wet well. Drop pump and wire through casing. Pump would be hung off of 1” stand pipe at the 5’ depth from 4” well seal. Will this work or is there a better way to do this including a flow sleeve if needed?
The motor manufacturer will tell you 2HP and smaller motors do not need a flow sleeve. However, they like to sell motors. 
Any motor will run cooler with a flow sleeve. A pump in a large body of water like a lake or 3' dug well actually needs a flow sleeve more than a pump in tight casing. It is the velocity of flow past the motor that is important, and a 3' column of water doesn't move very fast at 10 GPM flow, A flow sleeve is also a good way to keep sediment from building up around the motor. But you will probably get many years of service without a flow sleeve, just many more with.
What you propose will work, just need a 5" or 6" well seal and pipe for enough room to use a 4 or 4.5" flow sleeve.
Any motor will run cooler with a flow sleeve. A pump in a large body of water like a lake or 3' dug well actually needs a flow sleeve more than a pump in tight casing. It is the velocity of flow past the motor that is important, and a 3' column of water doesn't move very fast at 10 GPM flow, A flow sleeve is also a good way to keep sediment from building up around the motor. But you will probably get many years of service without a flow sleeve, just many more with. What you propose will work, just need a 5" or 6" well seal and pipe for enough room to use a 4 or 4.5" flow sleeve.
What if I just run 4”casing In either steel or pvc, deeper so that the pump is within the casing and the casing has an open end at bottom. Would that give the same cooling flow of a flow sleeve?The motor manufacturer will tell you 2HP and smaller motors do not need a flow sleeve. However, they like to sell motors.
What you propose will work, just need a 5" or 6" well seal and pipe for enough room to use a 4 or 4.5" flow sleeve.
Yep. That is another way to make a flow sleeve.
Ok thanks for help once againYep. That is another way to make a flow sleeve.