[RE-wrenches] Generac QT series
Jarmo.Venalainen at schneider-electric.com
Jarmo.Venalainen at schneider-electric.com
Tue Jul 14 09:43:11 PDT 2015
Hi:
I'm assuming the oscilloscope waveforms are voltages. If so, they don't
look bad.
I would get a current for the oscilloscope and and measure the L1, L2 and
Neutral currents. That should reveal what is going on.
JARMO
_____________________________________________________________________________________
Jarmo Venalainen | Schneider Electric | Xantrex Brand | CANADA |
Sales Application Engineer
Phone: +604-422-2528 | Tech Support: 800-670-0707 | Mobile:
+604-505-0291
Email: jarmo.venalainen at schneider-electric.com | Site: www.Xantrex.com
| Address: 3700 Gilmore Way, Burnaby, BC V5G4M1
*** Please consider the environment before printing this e-mail
From:
Mac Lewis <maclewis1 at gmail.com>
To:
RE-wrenches <re-wrenches at lists.re-wrenches.org>,
Date:
07/14/2015 06:01 AM
Subject:
Re: [RE-wrenches] Generac QT series
Sent by:
"RE-wrenches" <re-wrenches-bounces at lists.re-wrenches.org>
Hello wrenches,
Last December I posted about a Magnum 4448 and a Generac 22 kW generator
that aren't working well together. The symptom was that the Magnum
transformer would overheat very quickly, even at very low charge rates
(<2A DC). We have verified 120/240 VAC operation of the generator.
We were able to get up to the site with an oscilloscope and see if we
could find anything out. I've attached some photos of the oscilloscope
output. I don't have anything to compare it to, so I'd like to see if
anyone has some insight into why this may be occurring.
The 4 photos are as follows (all photos L1-L2):
1. Generator Waveform No Load: Unloaded Generator Voltage Waveform
2. Charger 1st Connected: AC Input Voltage waveform immediately after
charger connects
3. Steady State Operation Editted: AC Input Voltage waveform after about
10 seconds, this waveform continues until transformer overheats (in about
2 minutes) Note the disturbances.
4. Zoomed In Ripple: Closer view of the disturbances noted in #3.
We have tried replacing the Magnum with an identical unit, and we had the
same issue. We also tried a Honda 6500 with atrocious voltage and
frequency regulation and it worked fine with the Magnum. Since I did not
sell him the generator, the easy out is to replace the generator.
However, there is some custom exhaust duct work and it will be much more
expensive to replace the generator than to try a new inverter.
I think that over all it is preferable for the client to replace the
inverter/charger with a different brand. I have no problem doing that
except that I'd like to be relatively sure that this is anomalous behavior
between the Magnum and the Generac and not a generator issue. What are
the chances that I'd have the same issue with a different inverter? What
might cause this? All voltage and frequency measurements have been
perfect with the Generac.
Your comments or thoughts are appreciated.
Thanks
On Tue, Dec 16, 2014 at 11:15 AM, RE Ellison <reellison at gmail.com> wrote:
If memory serves me correctly and this is the off grid Generac they are
available as a 120 volt and it takes a new breaker and rewiring to get 120
/ 240 out of them
I run into this in the past they actually had it wired for 240 into a
balancing transformer to feed 120 into the inverter
We could've just left it at 120 volt
Later,
Bob ellison
Bob Ellison
On Dec 16, 2014, at 11:33 AM, "Baxter, Gary" <gbaxter at sensata.com> wrote:
Hi Mac,
Jay just had the same issue and it was 120v from the gen instead of
120/240. The inverter was charging using half the windings causing it to
Overtemp.
Check the 60A breakers on the side of the inverter. Also make sure to
remove the wires from the input terminal block before measuring voltage as
the inverter will make 120v look like 120/240v at the terminals.
If the generator is 3 Phase it won't work with this inverter unless you
only use one leg. This will work but you will need to turn the charge rate
to 50% in order to prevent Overtemp. Sometimes it works as high as 70%.
Gary Baxter
Product Manager
Magnum/Dimensions
On Dec 15, 2014, at 12:12 PM, Mac Lewis <maclewis1 at gmail.com> wrote:
Hi jarmo,
We have verified this is split phase 120/240. My multimeter gets 120 L-N
and 240 L-L.
Thanks
On Dec 15, 2014 10:25 AM, <Jarmo.Venalainen at schneider-electric.com> wrote:
Hi:
The Generac QT02224GNAX ships as a three-phase 120/208 VAC. I believe the
Magnum is a 120/240 VAC.
JARMO
_____________________________________________________________________________________
Jarmo Venalainen | Schneider Electric | Solar Business | CANADA
| Training & Development Specialist - Senior
Phone: +604-422-2528 | Fax: +604-420-1591 | Mobile: +604-505-0291
Email: jarmo.venalainen at schneider-electric.com | Site: www.SEsolar.com
| Address: 3700 Gilmore Way, Burnaby, BC V5G4M1
<mime-attachment.jpg>
*** Please consider the environment before printing this e-mail
From:
Mac Lewis <maclewis1 at gmail.com>
To:
RE-wrenches <re-wrenches at lists.re-wrenches.org>,
Date:
12/15/2014 05:52 AM
Subject:
[RE-wrenches] Generac QT series
Sent by:
"RE-wrenches" <re-wrenches-bounces at lists.re-wrenches.org>
Hello wrenches,
We have a newly installed system that has a 22 kW Generac Quiet Source
QT02224GNAX with a Magnum MS4448-PAE. When we start the generator, the
Magnum's internal transformer temperature climbs to overtemp (240F) within
a 2 minutes. The batteries are being floated at the time, and haven't
seen more than 5A coming out of the generator. We swapped the Magnum out,
and we have the exact same issue. We then got a job-site gas generator
6500W and ran it. No problem whatsoever. The problem appears to be with
the Generac, or with the interaction between the Generac & the Magnum. I
didn't have a scope on site but the fluke multimeter doesn't detect
anything wrong with the voltage or frequency coming from the Generac.
Has anyone had issues with the Generac QT? Anyone paired one with a
Magnum PAE before? I want to get my scope up there and look for triplen
harmonics, but I'm not sure how to filter these out. Any references on
how to effectively do that is appreciated.
Thanks in advance
--
Mac Lewis
"Yo solo sé que no sé nada." -Sócrates
______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
______________________________________________________________________
_______________________________________________
List sponsored by Redwood Alliance
List Address: RE-wrenches at lists.re-wrenches.org
Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive:
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out or update participant bios:
www.members.re-wrenches.org
_______________________________________________
List sponsored by Redwood Alliance
List Address: RE-wrenches at lists.re-wrenches.org
Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive:
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out or update participant bios:
www.members.re-wrenches.org
_______________________________________________
List sponsored by Redwood Alliance
List Address: RE-wrenches at lists.re-wrenches.org
Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive:
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out or update participant bios:
www.members.re-wrenches.org
_______________________________________________
List sponsored by Redwood Alliance
List Address: RE-wrenches at lists.re-wrenches.org
Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive:
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out or update participant bios:
www.members.re-wrenches.org
_______________________________________________
List sponsored by Redwood Alliance
List Address: RE-wrenches at lists.re-wrenches.org
Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive:
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out or update participant bios:
www.members.re-wrenches.org
--
Mac Lewis
"Yo solo sé que no sé nada." -Sócrates
______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
______________________________________________________________________[attachment
"Generator Waveform No Load.jpg" deleted by Jarmo
Venalainen/Canada/Schneider] [attachment "Charger 1st Connected.jpg"
deleted by Jarmo Venalainen/Canada/Schneider] [attachment "Steady State
Operation Editted.jpg" deleted by Jarmo Venalainen/Canada/Schneider]
[attachment "Zoomed In Ripple.jpg" deleted by Jarmo
Venalainen/Canada/Schneider]
_______________________________________________
List sponsored by Redwood Alliance
List Address: RE-wrenches at lists.re-wrenches.org
Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive:
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out or update participant bios:
www.members.re-wrenches.org
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20150714/a6eaec54/attachment-0002.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/gif
Size: 40194 bytes
Desc: not available
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20150714/a6eaec54/attachment-0020.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/gif
Size: 4274 bytes
Desc: not available
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20150714/a6eaec54/attachment-0021.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/gif
Size: 1869 bytes
Desc: not available
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20150714/a6eaec54/attachment-0022.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/gif
Size: 1897 bytes
Desc: not available
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20150714/a6eaec54/attachment-0023.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/gif
Size: 2041 bytes
Desc: not available
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20150714/a6eaec54/attachment-0024.gif>
More information about the RE-wrenches
mailing list