Thanks Chris!
Unfortunately I'm finding that unless you build an integrated control -
motor combo that can soft start like Franklin did - the majority of
single phase motors can't use soft start. That is probably a 3-phase
motor in that pump that they have an inverter for in the controls - or
they used a shaded pole or spit capacitor single phase motor which can
use soft start - at least that is what my initial research and phone
call to the pump control company has thus far revealed.
Apparently you can play with the voltage-amperage tradeoffs when you
have the 3 magnetic fields interaction - single phase doesn't allow you
much room to wiggle.
I do see single phase soft-starts on the market - still researching but
that's my initial findings.
Anyone know differently?
Thanks!
Jeff
ch...@oasismontana.com wrote on 7/26/19 9:27 AM:
Here at the Oasis home/office, we have a Goulds 3 hp 240VAC soft start
pump (#18GS30, w/ Franklin motor HS09970 and #3AS30 Aquavar Solo
controller); it’s been running off of my 2011 Radian GS8048 since
2016, when I had to drill a new well (the water table is dropping) and
pump from about 300 ft. depth.I have 3500 ft. of drip irrigation, a
big garden and the usual domestic water loads.It’s worked flawlessly
since its inception, and I cannot speak more highly of Goulds pumps.My
first one lasted 23 years (it was a 1.5HP model).
Best,
Chris Daum
Oasis Montana Inc.
406-777-4309 or 4321
406-777-4309 fax
www.oasismontana.com <http://www.oasismontana.com>
*From:*RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> *On
Behalf Of *Dana
*Sent:* Friday, July 26, 2019 9:34 AM
*To:* 'Jeff Clearwater' <je...@villagepowerdesign.com>; 'RE-wrenches'
<re-wrenches@lists.re-wrenches.org>
*Subject:* Re: [RE-wrenches] Soft Start Modules for Well and Sewage Pumps?
Yes I have used soft starts offgrid with SW & VFX for 15+ years, in
spite of doing load evaluations & others installing what ever they
normally used. It has been a great rescue device. Well pump, 2 dish
washers, booster pump, etc.
Dana Orzel Great Solar Works, Inc.
*C - 208.721.7003 d...@solarwork.com <mailto:d...@solarwork.com>*
Idaho Contractor - # 028765 Idaho PV # 028374
NABCEP # 051112-136 www.solarwork.com <http://www.solarwork.com>
_"Responsible Technologies for Responsible People since 1988" _
*P*Please consider the environment before printing this email.
*From:*RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org
<mailto:re-wrenches-boun...@lists.re-wrenches.org>> *On Behalf Of
*Jeff Clearwater
*Sent:* Friday, July 26, 2019 8:04 AM
*To:* RE-wrenches <re-wrenches@lists.re-wrenches.org
<mailto:re-wrenches@lists.re-wrenches.org>>
*Subject:* [RE-wrenches] Soft Start Modules for Well and Sewage Pumps?
Hey Wrenches,
Anyone have success using soft-start modules on well and sewage pumps
to lower the surge for off-grid inverters?
The baby we are trying to tame is a 2 HP 15 amp, 53 LRA Omnivore
Grinder Pump - LSG200 series - single phase 230 Vac.
Thanks!
Jeff
~~~~~~~~~~~
Jeff Clearwater
Village Power Design
linkedin <https://www.linkedin.com/in/jeff-clearwater-0622a312/>
www.villagepowerdesign.com <http://www.villagepowerdesign.com>
cell - 413-559-9763
~~~~~~~~~~~~~~~~~~~~~~~
Jeff Clearwater wrote on 7/26/19 6:32 AM:
*Thanks Ray and Jerry,
Great to hear from you both with your years of combined experience :)*
*So yes looking at the 5 sec has me switching back to a trusty
Radian - _even then from what you are saying it may not work._*
And you are right Ray - Outback is careful to rate the "overload
capability" in KVA rather than KW due most likely to voltage sag
of course.
*So this 53 LRA 2 HP motor - if I can only trust the 5 second (50
A) might not start - especially with other loads on the system?*
*RADIAN SURGE RATINGS:*
*Maximum Output Current*
1 ms peak 100 Amps AC at 240 VAC, 200 Amps AC at 120 VAC
100 ms RMS 70.7 Amps AC at 240 VAC
*Overload Capability*
100 ms surge 16.97 kVa
5 seconds 12 kVa
30 minute 9 kVa
*Other's experience with 2 HP sewage pump or well pump motors on a
Radian?
Thanks!
Jeff*
Ray wrote on 7/25/19 5:48 PM:
I only look at the 5 sec and 30 sec surge ratings to get an
idea what an inverter can really do in the real world. All
those millisecond ratings/ in rush current specs won't get a
pump or motor started, and will basically just get you into
trouble. The reason they have those ratings in amps and not
watts, is that the voltage craters during that 100mS surge.
I can't tell you how many times we tried to start a pump,
compressor, or large table saw, and the inverter just shut
off, even though the "in rush current" was within the
theoretical inverter capacity. Actual Wrench list
testimonials are much more valuable than those arcane specs.
Ray Walters
Remote Solar
303 505-8760
On 7/25/19 5:15 PM, Jeff Clearwater wrote:
*Hey There Wrenches,*
So be advised that after a little research the SW dual
stack will NOT double the surge ratings of a single SW.
But that brings me to my second question:
*
What inverter surge rating should one refer to when
looking at maximum Inrush or LRA - 1ms? 100ms? 1 sec?*
*Your engineering wisdom welcomed!*
Thanks,
Jeff
Jeff Clearwater wrote on 7/23/19 8:27 PM:
Thanks for the tip! I'll check the firmware.
Dave Angelini Offgrid Solar wrote on 7/22/19 9:11 AM:
Hi Jeff,
I am not going to guess if this will work, it
should. I use XW's because they start anything I
have come across.
If you do this, make sure but SW's have the latest
and same firmware. There were problems with
stacked SW's early on in their development.
**Dave Angelini Offgrid Solar**
**"we go where powerlines don't"**
**http://members.sti.net/offgridsolar/**
**e-mail offgridso...@sti.net
<mailto:offgridso...@sti.net>**
**text 209 813 0060**
On Mon, 22 Jul 2019 07:26:07 -0700, Jeff
Clearwater <je...@villagepowerdesign.com>
<mailto:je...@villagepowerdesign.com> wrote:
Hey Esteemed Wrenches,
So I recently built a power trailer with a
single 4 KW (4048) Schneider SW for a client
with a moderate cabin lifestyle.
But he lives on a high hill and even though
his 2 HP Macerator is only rated at 15 amps
continuous that baby starts up with a whopping
kick - probably close to or at it's 53 Amps
Locked Rotor rating.
*The SW has the following surge capability:*
*SW 4048 Rated @ 240 Volts:*
Continuous - 15.2 Amps 3700 Watts
30 Minutes - 18.3 Amps 4400 Watts
5 Secs - 29.2 Amps 7000 Watts
Max (100ms?) - 41 Amps - 9840 Watts
Can I be confidant that 2 stacked SWs will
start this baby?
*Any experience with similar macerators - or
simply educated guesses?
*
Thanks!
Jeff
--
**Dave Angelini Offgrid Solar**
**"we go where powerlines don't"**
**http://members.sti.net/offgridsolar/**
**e-mail offgridso...@sti.net
<mailto:offgridso...@sti.net>**
**text 209 813 0060**
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--
~~~~~~~~~~~
Jeff Clearwater
Village Power Design
linkedin <https://www.linkedin.com/in/jeff-clearwater-0622a312/>
www.villagepowerdesign.com <http://www.villagepowerdesign.com>
cell - 413-559-9763
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