QO Breakers and Panels [RE-wrenches]

[Bill Brooks]

Jay and Wrenches,

Very good question and one I have been grapling with lately. The Heinemann
is rated for 10,000 AIR which is questionable for paralleled battery banks.
I think we need to do some testing at this point to find out whether a 20k
or 25k AIR fuse is needed prior to the breaker (or instead). We keep quoting
6,000-8,000 amps at short circuit for a T-105, but is this true? What is the
rating of other batteries? What is the impact of paralleling batteries on
the short circuit capability? Important questions and we really need
answers.

Bill.


-----Original Message-----
From: jay peltz [mailto:jay at asis.com]
Sent: Friday, March 09, 2001 7:44 AM
To: RE-wrenches at topica.com
Subject: Re: QO Breakers and Panels [RE-wrenches]


Hi Drake,

The one issue I have with fuses is that they at somepoint will fail and that
means
a house call.  The reason we all use breakers and want to use them is for
ease for
the customer.  (Don't see to many grid homes these days with screw in fuses
no?)

I am familiar with the AIR situation, and I also know ( inregards to your QO
breaker failure) that standard AC breakers fail also, so I'm not sure that
from one
"problem" we can the whole idea of breakers.

If there are better breakers, that do a better job then great lets use them.
The
AirPax/heinman work better but are just more expensive and difficult to use.
Doesn't mean we shouldn't use them though.

So here is my question:
I know that there are differences between what a assembled product can do
and what
we can make in the field, however is the issue really safety or what?
I mean Trace uses Heineman direct to battery, Pulse used QOU on 48v systems?
So are
these unsafe? Or if they are safe then what?

I leave this in the hands of probably Bill and Drake??

thanks,

jay
peltz power

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____________________________________________________________
T O P I C A  -- Learn More. Surf Less. 
Newsletters, Tips and Discussions on Topics You Choose.
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