On 5/23/2012 4:44 PM, Darryl Thayer wrote:
I sure do not like the way the X brand installed their charge
controller, Also the code says that all strings must open if one
string is faulted. your breaker does this up to 4 strings.
DT
I think that this is the pertinent part of the code regarding this...
In part...
31.1 Inverters or charge controllers with direct photovoltaic inputs
from a grounded photovoltaic array or
arrays shall be provided with a ground-fault detector/interrupter
(GFDI). The GFDI shall be capable of
detecting a ground fault, providing an indication of the fault,
interrupting the flow of fault current, and either
isolating the faulted array section 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 <shigg...@outbackpower.com>
*To:* RE-wrenches <re-wrenches@lists.re-wrenches.org>
*Sent:* Wednesday, May 23, 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 Street NE Arlington, Washington 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.
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 dc
system bond is a serious design flaw.
Kent Osterberg
Blue Mountain Solar, Inc.
www.bluemountainsolar.com <http://www.bluemountainsolar.com>
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