Hi Bill, Other than good resolution for a lower range of resistance to ground, are there any other bells and whistles for a Megger Tester that you'd suggest or recommend?
Thanks, Howie -- Howie Michaelson NABCEP Certified Solar PV Installer Sun Catcher, LLC Renewable Energy Systems Sales and Service VT Solar & Wind Incentive Program Partner http://www.SunCatcherVT.com (cell) 802-272-0004 (home) 802-439-6096 On Mon, April 13, 2009 8:17 pm, Bill Brooks wrote: > Kingsley, > > > > The concern I have about this unit, and many other inexpensive ones like > it, is that it does not have enough resolution in the low impedance area. > PV arrays can have an impedance to ground of as low as 2kOhms. A > resolution of 0.1MOhms will likely not cut it. I just bought a $175 meter > for fun and I will take it out into the field to try it next to the Fluke > 1520. If we can get decent information, great. But the better resolution > may require spending closer to the $700 or more. > > > > The key is that you donât want to be chasing a ground fault that really > does not exist. The resistance to ground can be so low that a simple meter > will call it ground-faulted. Iâll let you know what I find out. Iâm > betting that megger testing PV arrays is about to get required much more > regularly. > > > > Bill. > _______________________________________________ List sponsored by Home Power magazine List Address: [email protected] Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
