Three Phase 480 Volt Electric Deep Well Pump
- Thread starter bryan
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- Massachusetts
Re: Three Phase 480 Volt Electric Deep Well Pump
In my opinion run in reverse the pump will draw less current.
All things being equal a 3 phase motor should draw the same current one direction or the other.
However a centrifugal pump run in reverse will move less water and require less power to spin.
But that is just my gut feeling, I do not have anything to back it up.
In my opinion run in reverse the pump will draw less current.
All things being equal a 3 phase motor should draw the same current one direction or the other.
However a centrifugal pump run in reverse will move less water and require less power to spin.
But that is just my gut feeling, I do not have anything to back it up.
hey_poolboy
Senior Member
- Location
- Illinois
Re: Three Phase 480 Volt Electric Deep Well Pump
I'll post my best guess here.
A deep well pump running in reverse would have very little load due to the design of the impeller. This would make me think that the current consumption would be less.
mike
man, beat to the punch again
[ December 18, 2005, 02:38 PM: Message edited by: hey_poolboy ]
I'll post my best guess here.
A deep well pump running in reverse would have very little load due to the design of the impeller. This would make me think that the current consumption would be less.
mike
man, beat to the punch again
[ December 18, 2005, 02:38 PM: Message edited by: hey_poolboy ]
Re: Three Phase 480 Volt Electric Deep Well Pump
Most deep well pumps I have seen will draw far less current backward because as soon as you do they spin the shaft off and drop it into the well! Well pumps, of the vertical induction type, should never be started backward. The resulting damage can be catastrophic.
Most deep well pumps I have seen will draw far less current backward because as soon as you do they spin the shaft off and drop it into the well! Well pumps, of the vertical induction type, should never be started backward. The resulting damage can be catastrophic.
- Location
- Bremerton, Washington
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- Master Electrician
Re: Three Phase 480 Volt Electric Deep Well Pump
I've started up many new well pumps, 25-100 hp, these are the vertical turbine type. For example, a 50 hp pump will be 55 amps forward and 35 in reverse. the easy way to tell if rotation is correct is to check flow and water drawdown. I always check and reverse rotation to make sure.
Then I mark the rotation on the motor controller.
I've started up many new well pumps, 25-100 hp, these are the vertical turbine type. For example, a 50 hp pump will be 55 amps forward and 35 in reverse. the easy way to tell if rotation is correct is to check flow and water drawdown. I always check and reverse rotation to make sure.
Then I mark the rotation on the motor controller.
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