[RE-wrenches] Capacitive Discharge Test Results

2014-03-28 Thread Corey Shalanski
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

Re: [RE-wrenches] Capacitive Discharge Test Results

2014-03-28 Thread Marco Mangelsdorf
-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

Re: [RE-wrenches] Capacitive Discharge Test Results

2014-03-28 Thread Chris Mason
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

Re: [RE-wrenches] Capacitive Discharge Test Results

2014-03-28 Thread Corey Shalanski
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 ᐧ ___ List sponsored by Home Power magazine

Re: [RE-wrenches] Capacitive Discharge Test Results

2014-03-28 Thread Erika Weliczko
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

Re: [RE-wrenches] Capacitive Discharge Test Results

2014-03-28 Thread August Goers
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

Re: [RE-wrenches] Capacitive Discharge Test Results

2014-03-28 Thread Chris Mason
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

Re: [RE-wrenches] Capacitive Discharge Test Results

2014-03-28 Thread Gary Willett
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:

Re: [RE-wrenches] Capacitive Discharge Test Results

2014-03-28 Thread Exeltech
. 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