Bore Hoile Pumps
Bore Hoile Pumps
(OP)
I have an application of bore hole pumps at 300meter distance.
motors data are 195KW, 460V, 3PH, 60Hz with 0.83pf and 86.5% eff.
voltage available is 480V/3/60 and 13.8KV
what type of starter would be appropriate
motors data are 195KW, 460V, 3PH, 60Hz with 0.83pf and 86.5% eff.
voltage available is 480V/3/60 and 13.8KV
what type of starter would be appropriate





RE: Bore Hoile Pumps
That analysis is somewhat complex and at that size motor and distance, is probably worthy of a good quality study using one of a number of software packages that perform what is called a Transient Motor Starting (TMS) analysis. Anything else is just a S.W.A.G. (Scientific Wild Ass Guess). The software is typically expensive, but you can also consider hiring an Engineer who already has it to do the study for you. Avoiding a burned out motor, starter or a lot of lost production time will likely be worth it for you.
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RE: Bore Hoile Pumps
If the flow is constant, AND the pump is correctly sized for the flow and head, there will be no benefit from the use of a VFD and at that point you can consider a soft starter or an electromechanical starter. I agree with Jeff, don't even think about a star delta starter.
Bore pumps will typically start at around 250% current with a good soft starter and the soft starter is able to provide a gentle ramp up and ramp down which is good for eliminating water hammer.
Best regards,
Mark Empson
L M Photonics Ltd
RE: Bore Hoile Pumps
Thanks