Current will pass through so just one hot leg to earth, be carefull not to overload the diodes, l have never had an issue but you never know. JerrySent from my Verizon, Samsung Galaxy smartphone -------- Original message --------From: drake.chamber...@redwoodalliance.org Date: 4/10/19 3:07 PM (GMT-08:00) To: RE-wrenches <re-wrenches@lists.re-wrenches.org> Subject: Re: [RE-wrenches] HV Module Testing That is very helpful. If I do the high voltage test, can I test from both positive to the frame and negative to the frame? Thanks,Drake ----- Original Message -----From: "RE-wrenches" <re-wrenches@lists.re-wrenches.org>To:"RE-wrenches" <re-wrenches@lists.re-wrenches.org>Cc:Sent:Wed, 10 Apr 2019 10:35:50 -0700Subject:Re: [RE-wrenches] HV Module TestingDrakeI have performed test for manufactures and you must keep the test voltage under the max rated voltage of the module, we have a bunch of tests we do but in short, you need to see the modules up close, look at the edges and back sheets look for green, brown or black spots, you need to do testing both dry first then wet if it is a ground fault concern. Most of the time the visual will find the issues but you still want to verify what you think you see. Make sure you look at the wiring to and from, the combiner box(s) or even the inverter(s).On Wed, Apr 10, 2019 at 8:31 AM Drake <drake.chamber...@redwoodalliance.org> wrote:
Hello Wrenches, We are troubleshooting an array of Orion modules, either 230s or 250s. The array is showing a ground fault. We would like to test these modules with an insulation tester? We would like to apply 500 V or 1000 V to each the + and – and test resistance to ground. Is this practice safe for individual PV modules? Is there anything I should be aware of before attempting this? Thanks, DrakeDrake ChamberlinAthens Electric LLC OH License 44810 CO License 3773 NABCEP Certified Solar PV 740-448-7328http://athens-electric.com/ _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@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
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