Misleading fault indications [RE-wrenches]

[Mark Edmunds]

Hi Mark,

For most faults there will be an indication, but like on a lot of the
Grid Tie Inverters in the unlikely case of a very low impedance fault
connection directly from the PV negative to ground back to the XW charge
controller chassis the fuse could blow, protecting against the fault but
not showing an indication. We have never seen this type of fault before,
but the fuse certainly would protect against any continued fault current
flowing.

Mark


Mark Edmunds
Director Engineering
Residential Renewable Energy Group
Xantrex Technology Inc.

-----Original Message-----
From: Mark Frye [mailto:markf at berkeleysolar.com] 
Sent: Friday, February 29, 2008 5:18 PM
To: RE-wrenches at topica.com
Subject: RE: Misleading fault indications [RE-wrenches]


Mark,

Perhaps you could respond directly to issues raised, will the DC
negative to ground fault persist and go un-indicated?
 
Mark Frye
Berkeley Solar Electric Systems
271 Vistamont Dr
Grass Valley CA 95945
(530) 401-8024
www.berkeleysolar.com
 


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