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
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
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
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
, 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
, 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
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
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
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
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 dc system bond is a
serious design flaw.
Kent Osterberg
Blue Mountain Solar, Inc.
www.b
Bob,
Be careful with that GFDI... It's most likely wired on the output of the
controllers, on the battery side.
This can trip if a ground fault is occurring, or if you are exceeding 80 amps
of current. With 8, 3 module strings, an edge of cloud event you could have
the 80amp portion of that
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
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
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
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