Kevin,
Not to add any confusion but I recently had to re-program the slave in
a 2 VFX with Xfrmr system as it was doing the same thing...the 2 pole xfrmr
breaker was tripping when a moderate load was on. Granted this was not
happening during charging though. I think I changed the slave from OB slave L1
to OB slave L2 and all was good. It doesn't seem likely the programming in
your case would have been messed with having been working well for years prior.
Curious to hear though of a solution eventually.
Bill
Feather River Solar Electric
4291 Nelson St.
Taylorsville, CA 95983
530.284.7849 / 6544 fax
----- Original Message -----
From: Tump
To: RE-wrenches
Sent: Monday, March 16, 2015 5:39 AM
Subject: Re: [RE-wrenches] Outback quad stack X240 breaker tripping
Have you turned the breaker on the t240 to the off position? One does NOT
have to have that operational for the system to operate correctly.The old t240
has about the same parasitic draw as an inverter. Isolate, Isolate, Isolate. If
the system functions correctly w/ the t240 off and the stacking is correct on
this q stack disconnect it(the t240). Otherwise I would remove the inverter com
cables and only connect 1 pair of inverters at a time, reset the mate with the
correct com cables connected to P1& P2. Sometimes something so simple as
disconnecting & reconnection the mate can have quite a benefit. Again I would,
if you are really stuck on having the t240 operational, then try it with each
inverter as a single unit then try the second set of inverters. Disconnect the
#s1&2 inverters and do the same; connect #s 3&4 P1 & P2, to see exactly which
component may be your problem.
You are more then happy to contact me off list if you choose. contact info
below. Tump
On Mar 15, 2015, at 5:04 PM, Jerry Shafer wrote:
Wrenches
OK if the X240 blows the fuse which is on the output of the inverter while
the inverter is charging, excessive current must be passing through from one
inverter and back to the output of another inverter ( a form of AC coupling
gone bad). The time delay fits as the inverter ramps up, I would look at the
contactors in each slave as one may be hanging or ther may be a bad board, easy
way to test is to isolate each inverter and with a amp meter connected at the
X240 see if current goes away in the X240 as it should not be doing much with
light loads on the "House" side of the inverters. The X240 is 25 amps while the
inverters are 50 amps. Sounds like a interesting one to diagnose.
Jerry
On Wed, Mar 11, 2015 at 11:59 AM, Chris Worcester
<ch...@solarwindworks.com> wrote:
Hi Kevin,
I have seen the X240's trip off like this when theyare over loaded.
When this was happening to us the slave inverters had blown AC boards and some
times Control and FET boards too. We had a hard time diagnosing this as their
green lights were on. Using a clamp on amp meter on each inverter's AC IN
conductor while charging with the gen set allowed us to compare their charging
currents to each other. Typically the ones with blown AC boards output would
be close to zero amps. So the X240's were doing double duty and they will smoke
too if the inverters aren't delta with.
Sincerely,
Chris Worcester
530-448-9692
Sent from my Galaxy S®III
-------- Original message --------
From: Kevin Pegg
Date:03/11/2015 1:19 PM (GMT-08:00)
To: RE-wrenches
Subject: [RE-wrenches] Outback quad stack X240 breaker tripping
Hello Wrenches,
Customer in remote location has a strange situation come up on an
existing system installed (by others) 6 or so years go. Quad stack VFX3648.
Last night gen start was triggered by low voltage - a normal system
operation.
Approx 1h into charge, they lost 1/2 the circuits in house - L2
de-energized. Caretaker went to check power system and noticed the X240
breakers tripped. Tried to reset but it tripped out right away. So he left it
as is and called me in the morning.
Here's what I've been able to determine today:
- The x240 is installed to bridge L1 & L2 on the load side.
- with master inverter on, 3 slaves off, both L1 and L2 energized so
suggests x240 is working.
- within 10 seconds of generator on and charging, x240 breaker trips (and
makes L2 go dark).
- loads are minor, ~1,000 w of misc lights and such, isn't all loaded up
on one leg.
Appreciate any thoughts to remedy. I'm not as familiar with this config
as others.
Kevin Pegg
EA Energy Alternatives Ltd.
37471 Hwy 16 E
Telkwa, BC V0J 2X2
250-846-9888
Http://www.EnergyAlternatives.ca
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t...@swnl.net www.SWNL.net
Solarwinds Northernlights
Serving Mid Coast Maine & Northern California
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