Fellow Wrenches,
We recently commissioned a 220kW rooftop PV system and are having some
inverter malfunction issues. The system details are as follows:
- Inverters: Power One Aurora Trio-27.6 (x7)
- Modules: Stion STN-130 (x1690)
- Array: Strings of 14-16 modules each, 8 strings per combiner, 1
-wrenches] Capacitive Discharge Test Results
Fellow Wrenches,
We recently commissioned a 220kW rooftop PV system and are having some inverter
malfunction issues. The system details are as follows:
- Inverters: Power One Aurora Trio-27.6 (x7)
- Modules: Stion STN-130 (x1690)
- Array: Strings
If you are using a high resistance meter, you may be experiencing phantom
voltages. Here's a Fluke paper on it.
http://support.fluke.com/find-sales/Download/Asset/2105317_A_w.pdf
You might also discuss with the manufacturer putting a 1M ohm resistor from
the center of the strings to the grounded
As a follow up to my earlier post, I am wondering what brand/model other
wrenches are using to conduct megger tests?
Can you recommend a good starter unit?
--
Corey Shalanski
Joule Energy
New Orleans, LA
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Given the recent discussions about transformerless inverters, troubleshooting,
misc voltages
Do we need some guidance from inverter manufacturers and others to evaluate
BEFORE all this equipment is in?
Electrical tests for metal roofs, etc?
Erika Weliczko
REpower Solutions
cell: 216.402.4458
that?
Best,
August
Luminalt
*From:* re-wrenches-boun...@lists.re-wrenches.org [mailto:
re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *Chris Mason
*Sent:* Friday, March 28, 2014 1:30 PM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] Capacitive Discharge Test Results
If you
I would not get a megger, rather, we bought a Seaward Solar PV150 test kit.
It will perform the following tests in a few seconds and is brain-dead easy
to use.
- Earth / ground continuity
- Open circuit voltage
- Short circuit current
- Insulation resistance
- DC operating power
COREY:
I use the Megger MIT430. It stores the measurements and then you
can download to a PC via BlueTooth.
Regards,
Gary Willett
Icarus Engineering Solar Services
On 3/28/14, 4:06 PM, Corey Shalanski wrote:
. There may be a strange
topology out there that would be an exception .. but I'm not aware of any.
Dan
On Fri, 3/28/14, Chris Mason cometenergysyst...@gmail.com wrote:
Subject: Re: [RE-wrenches] Capacitive Discharge Test Results
To: RE-wrenches re
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