Re: [RE-wrenches] Finding ground faults

2012-05-24 Thread James Jarvis
Yes. Look for 4-20mA loop clamp on meters. Fluke 77x series is an example: http://www.fluke.com/Fluke/usen/Clamp-Meters/Fluke-771-Milliamp-Process-Clamp-Meter.htm?PID=69415 0 to 100mA with 1% accuracy worst case over the whole range. -James Jarvis APRS World, LLC On 05/24/2012 12:49 AM, Willia

Re: [RE-wrenches] Finding ground faults

2012-05-23 Thread William Miller
Mike: Is there such a tool as a DC clamp-on that can reliably measure 10 mA? My experience is any clamp meter is unreliable below 5A. William At 10:09 PM 5/23/2012, Mike Sullivan wrote: Hi Bob, Sorry if I am duplicating any of the replies you've already received regarding the possible gr

Re: [RE-wrenches] Finding ground faults

2012-05-23 Thread Mike Sullivan
Hi Bob, Sorry if I am duplicating any of the replies you've already received regarding the possible ground fault. I think the best way to determine whether GFDI is tripping on 1 A ground current or 80 A circuit current is to use a sensitive DC clamp-on to check the current on your system ground

Re: [RE-wrenches] Finding ground faults

2012-05-23 Thread b...@midnitesolar.com
or disabling the inverter to cease the export of power. This may very well change in the 2014 NEC from what I understand. boB *From:* Steve Higgins *To:* RE-wrenches *Sent:* Wednesday, May 23, 2012 2:18 PM *Subject:* Re: [RE-wrenches] Finding ground faults From what I understand

Re: [RE-wrenches] Finding ground faults

2012-05-23 Thread b...@midnitesolar.com
, 2012 2:18 PM *Subject:* Re: [RE-wrenches] Finding ground faults From what I understand, future controllers from Outback Power will incorporate the Ground Fault detection into the controller. Steve Higgins Sales Application Engineering Mgr Direct 360-618-4313 Outback Power Technologies 5917 195th

Re: [RE-wrenches] Finding ground faults

2012-05-23 Thread Darryl Thayer
, 2012 2:18 PM Subject: Re: [RE-wrenches] Finding ground faults   From what I understand, future controllers from Outback Power will incorporate the Ground Fault detection into the controller.     Steve Higgins Sales Application Engineering Mgr Direct 360-618-4313 Outback Power

Re: [RE-wrenches] Finding ground faults

2012-05-23 Thread Darryl Thayer
1000 volts, after the fault cleared, the megger found one string that was bad and I located the problem in a J box  From: Steve Higgins To: RE-wrenches Sent: Wednesday, May 23, 2012 11:27 AM Subject: Re: [RE-wrenches] Finding ground faults Bob,   Be

Re: [RE-wrenches] Finding ground faults

2012-05-23 Thread Steve Higgins
98223 From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William Miller Sent: Wednesday, May 23, 2012 11:22 AM To: RE-wrenches Subject: Re: [RE-wrenches] Finding ground faults Steve: IMHO, a brilliant suggestion. W

Re: [RE-wrenches] Finding ground faults

2012-05-23 Thread William Miller
Steve: IMHO, a brilliant suggestion. William Miller At 11:19 AM 5/23/2012, you wrote: Steve, It would be appropriate for the GFDI to have 80-amp rated contacts that do not have an over-current trip mechanism. IMHO, the fact that they can trip on over-current and unnecessarily interrupt the

Re: [RE-wrenches] Finding ground faults

2012-05-23 Thread Kent Osterberg
98223 *From:* re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *Bob Clark *Sent:* Tuesday, May 22, 2012 7:37 PM *To:* re-wrenches@lists.re-wrenches.org *Subject:* [RE-wrenches] Finding ground faults Wrenches: Sor

Re: [RE-wrenches] Finding ground faults

2012-05-23 Thread Steve Higgins
-boun...@lists.re-wrenches.org] On Behalf Of Bob Clark Sent: Tuesday, May 22, 2012 7:37 PM To: re-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] Finding ground faults Wrenches: Sorry to bring up this situation again, but I could not find a previous discussion thread that talked about step-by

Re: [RE-wrenches] Finding ground faults

2012-05-23 Thread Dave Click
Here's the Paul Mync / John Berdner article from SolarPro 2.5: http://solarprofessional.com/article/?file=SP2_5_pg60_Mync -David Brearley... er... Click On 2012/5/22 22:36, Bob Clark wrote: Wrenches: Sorry to bring up this situation again, but I could not find a previous discussion thread that

Re: [RE-wrenches] Finding ground faults

2012-05-22 Thread b...@midnitesolar.com
Hey Bob ! Hi from the west side of the hill. This seems like an easy one... Well, maybe... One a dry day, take a garden hose and spray different parts of the system and see if you can duplicate the problem and locate where the water makes it trip. But you may have to wait a while for each

Re: [RE-wrenches] Finding ground faults

2012-05-22 Thread Jesse Dahl
A problem I have seen during my work with SiE is getting the "tray" covers on without pinching a wire, if one of the black plastic bolt guards was left off or lost, it could pinch, but they seem water-tight. I haven't run into any fault problems with SiE, but I see the possibilities. Keep me

[RE-wrenches] Finding ground faults

2012-05-22 Thread Bob Clark
Wrenches: Sorry to bring up this situation again, but I could not find a previous discussion thread that talked about step-by-step procedures for tracking down ground faults (I believe it was John Berdner who provided the bulk of the writing in that regard and it related to high voltage strings