[RE-wrenches] fronius IG Plus practical engineering WAA???

[Darryl Thayer]

Again this is FMI for my information, Did not Square D change there rating for PV systems?  
Darryl

--- On Fri, 6/26/09, Phil Undercuffler <solarphil at gmail.com> wrote:

> From: Phil Undercuffler <solarphil at gmail.com>
> Subject: Re: [RE-wrenches] fronius IG Plus practical engineering WAA???
<snip> 
> 
> This confirmed my understanding
> that the limiting factor
> on the 30A switch
> 
> in a photovoltaic applications is
> not 30A * 0.8.  The limiting factor
> is 18A
> 
> per pole or 11.5A Isc per pole.
> 
> <unsnip>
> 
>  
> 
> To clarify – the 18A per pole /
> 11.5A Isc per pole only
> applies if you are using the limited listing for PV
> applications, with one
> string or subarray per pole.  If you
> wire
> the HU361RB disconnect with two poles connected in series,
> then you may run the
> switch at 100% of its rating.  
> 
>  
> 
> Therefore, you can stuff up to 24
> amps Isc (24 * 1.25 =
> 30) through a single disconnect if the poles are wired in
> series, or you can
> run 3 subarrays each with no more than 11.5A per pole if
> wired in
> parallel.  
> 
>  
> 
> Sometimes it’s good to have
> options.
> 
>  
> 
>  
> 
>  
> 
> Phil Undercuffler
> 
> Director, Battery-based and
> Off-grid
> 
> Distribution Sales Group
> 
> Conergy 
> 
> Our World Is Full of Energy
> 
> 1730
> Camino Carlos Rey Suite 103
> 
> Santa
> Fe, NM  87507
> 
> p.undercuffler at conergy.us
> 
> Direct
> |
> 505.216.3841
> 
> Toll Free | 888.396.6611 x4841
> 
> Fax | 505.473.3830
> 
> www.conergy.us
> 
> 
> 
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