Howie, If meggering an array, first of all, check with your panel oem to see what voltage they recommend to safely IRT. In a series string, you are effectively meggering at the meter voltage plus the cumulative series string voltage. If the meter is set to 500v, and you are measuring a string which is 500 vdc open circuit, the last panel in the string is meggered at 1000v, the middle panel 750v, etc.
Kirk Herander VSE Sent from a job site somewhere > On Jul 23, 2015, at 8:18 AM, Howie Michaelson <[email protected]> wrote: > > We are starting to work with 1000 volt arrays. What different settings > should we be using for testing insulation on these array? Anyone have a > favorite megger for testing these arrays. > > Thanks as always, > Howie > -- > Howie Michaelson > NABCEP Certified PV Installation Professional™ > Catamount Solar, LLC > > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/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: [email protected] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/[email protected]/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
