Trace C60 Rating [RE-wrenches]

[Bill Brooks]

Larry,

The C-40 can handle up to 63 amps for very short periods, but I have seen
several C-40s fail when presented with a constant 55 amps. It's a very
robust controller, but it ain't superman. The idea behind the original
rating was to factor in the 1.56 factor from the beginning since most
installers took current ratings at their face value. This is the only
controller in my experience that took that approach. I believe it to be the
proper approach (even though installer still insist on putting 50 amp+
arrays on it because it is "designed" to take it). All other controllers
should be treated as being able to handle only 80% of their rating for
continuous operation unless you have good information otherwise.

Bill.


-----Original Message-----
From: Lawrence Elliott [mailto:larry at energyoutfitters.com]
Sent: Thursday, April 18, 2002 3:18 PM
To: RE-wrenches at topica.com
Subject: Re: Trace C60 Rating [RE-wrenches]


Bill. I seem to recall when the C40 was just being introduced , someone
from Trace's engineering staff telling me that the C40 was actually
rated to handle up to 63 amps but derated to 40 to comply with UL.
I have two on a hydro as dump loads that regularly see sustained 50 +.

Don't recall who the person was.

Larry Elliott


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