starting a 1 HP well pump with a VFX3648 [RE-wrenches]
Todd Cory, Mt. Shasta Energy Services
toddcory at finestplanet.com
Sat Jan 27 10:12:21 PST 2007
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Has anyone tried one of these?
http://www.advancedmotorpower.com/mbss6.htm
At $245.00 it looks like it might be an elegant solution to this problem.
Todd
Darryl Thayer wrote:
>Hi Kurt and Todd
>Yes I agree with Kurt, volt drop in the wire is very
>important, Measure the running amps, look up the wire
>size, look in NEC Chapter 9 Table 8 and find the wire
>size--ohms/1000 feet and calculate the volt drop VD= I
>x ohms/kft x (total ft round trip)/1000, This should
>not bemore than 3 or 5%
>
>As to capacitor size, we always put a larger capacitor
>on a hard starting motor. (there may be some trick in
>regards to the inverter that I am unaware of however.}
>
>Caution Caution I have not tried this on a pump.
>For far out ideas, I have heard of putting a resistor
>in series with the motor or the "Run" winding on a
>time delay on start relay, The time delay adjusted to
>about 1 sec or less and the resistors for the start
>current of about 2 ohms (assuming 1 hp and NEC sstart
>current as given NEC Table 430.251(A) I can do this
>in the shop with an unloaded motor, works fine, but a
>pump is a different matter. I hope if this has merit
>some other wrenches have tried it.
>--- Kurt Nelson <sunwise at cheqnet.net> wrote:
>
>
>
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