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Posted by Smarty on 06/08/07 02:42
I raised the specific issue Bernie since most / all generators protect the
individual circuits / phases with either fuses or circuit breakers, and you
had estimated 29 and 30 amp loads in 2 of the 3 circuits which could, at
most, be fused for 83/3 amps, roughly 27 amps. As my prior reply stated, you
are operating with too small a margin, if any. I am, however, very
surprised that only 20KW and 60KW options exist, since you would be very
well served with a 25, 30, 35, or 40 KW set with much lower hourly operating
cost, less noise, etc. I can only conclude that your local supplier does not
offer intermediate sizes even though they are quite common and popular. If
this is truly your predicament, then shifting some of the load to the least
loaded circuit would be my solution rather than moving to a 60KW generator.
As an alternative, could you rent 2 separate 15 or 20KW units, thereby
gaining the benefit of redundancy if one of the two should fail? A single
60KW seems like the wrong way to go IMHO.
Smarty
"Bernie Dwyer" <b_duibhirz@yahooz.comz.auz> wrote in message
news:4668AF26.A374B121@yahooz.comz.auz...
> One item I didn't consider - thanks for pointing it out - 20KVa/240/3
> only gives me ~27 amps per phase and I've already got a higher load than
> that on 2 phases. I don't know if individual phases can sustain a higher
> load as long as total loading doesn't exceed 20KVa/83.33 amps, but I
> wouldn't want to take the chance. I think that answers my original
> question - I'm going to need a bigger genny! Probably the model 400145
> or 400111 on the website above. Only trouble there, is that I have to
> pay extra to get one of them transported here - the local hire shop
> doesn't have one on hand. They do have a 60amp set, but that costs quite
> a bit more.
>
> Thanks again.
>
> --
>
> Bernie Dwyer
> There are no 'z' in my address
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