1.5 HP well pump [RE-wrenches]

[Dan Rice]

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Todd,

Windy once suggested an Allan-Bradley "Starting Torque Controller" to
address starting surge issues on a well pump. Fortunately or unfortunately,
I never had the chance to try it out. I did have the opportunity to look the
device up on the Allan Bradley web site -the document I have is titled
"Selection Guide, Smart Motor Controllers, Bulletin 150, 154,1560" -you may
be able to find this document on the A-B web site and see for yourself what
the unit does. The model number I looked into was a 154-A11NA, good for 11A
at 240 VAC. They make versions that handle up to 22 amps (I'm assuming
that's full-load current). Two rotary switches allow you to set the initial
starting torque (10-80%) and voltage ramp time (.1-4.5 sec.). The model
referenced priced out at $350, and was readily available through the local
A-B supplier. Windy may have hands-on experience with these units. I have no
knowledge of their in/compatibility with mod-sq. (A capacitor sounds a lot
cheaper and easier...).

Dan Rice
Abundant Sun, LLC.

----- Original Message ----- 
From: "Joel Davidson" <joeldavidson at earthlink.net>
To: <RE-wrenches at topica.com>
Sent: Sunday, August 07, 2005 10:35 AM
Subject: RE: 1.5 HP well pump [RE-wrenches]


I've used 450 microfarad capacitors with some success.

Windy - What the real solution?

Original Message:
-----------------
From: Todd Cory, Mt. Shasta Energy Services toddcory at finestplanet.com
Date: Sun, 07 Aug 2005 08:55:45 -0700
To: RE-wrenches at topica.com
Subject: 1.5 HP well pump [RE-wrenches]

Wrenches,

I inherited a poorly designed off grid system I am working on. It has a
stacked (240 volt) pair of DR1512 inverters fed by 12 L-16H batteries
(12 volts at 2500 a/h!!) trying to start a 1.5 HP well pump! The
inverters amazingly can occasionally start the pump when the batteries
are fully charged, but you know this has got to be a struggle for them.

I recall at one time someone saying increasing the capacitance of the
starting capacitor would ease the starting. It has a 240 volt 120 MFD
one now. What would people suggest (other than larger inverters) to make
this pump start reliably? Doesn't someone make a soft start control for
a well pump?

Thanks,

Todd

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