Ground fault [RE-wrenches]

[William Miller]

Kurt:

There was a 60 amp DC rated circuit breaker on both sides of the charge
controller.  Curiously, when I arrived on site, all circuit breakers had
been opened by the client, AC, DC, etc.  Even then, when I touched the
burned circuit board with a screw driver, it arced and sparked enough to
scare us.  Note in theory B no current flows through the positive leg of
the CC.  Breakers do no good there.

WM


At 09:54 AM 11/14/02 -0600, you wrote:
>Greetings William,
>
>There must have been a lot of current going though that CC.  I didn't
>know the RV products would allow reverse current flow.  Wasn't there a
>fuse or DC rated breaker between the CC and the battery?  I usually
>place one both between the battery and the CC and between the CC and the
>array.  It seems to me such over current protection would have prevented
>this almost as well as a GFI.
>
>Kurt Nelson
>SOLutions
>

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William Miller
Miller Power and Communications
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email: wrmiller at slonet.org
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