On 2011-11-01, Brian Lawson wrote:
Hey Iggy,

Simple math says "Yes"....50Hp X 750 watts = 37500 Watts X 1.15 (15%
derate) = 43125 Watts, so your 45000 Watt transformer should do. What
size is the disconnect for the 45KVA fused at??? Needs close to 200
amps.

There is no disconnect, only the transformer in the back of my truck.

KVA is not watts and I am not sure if it is enough to start the
compressor.

i

Brian Lawson,
Bo6thwell, Ontario.
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On Tue, 01 Nov 2011 13:05:07 -0500, Ignoramus18836
wrote:

On 2011-11-01, Cydrome Leader wrote:
Ignoramus23114 wrote:
I have bought a 3 phase 45 kvs transformer 480 - 240.

Since I buy and sell industrial equipment, I will be sure to come
across 460v only machines. So, I thought, I could use this transformer
to make 460v from 230v, which is what my building has.

So, realistically, can it be used in reverse? to make 460v.

you sure can, but may need to fiddle with the taps to get the voltages
right.

OK, thanks.

I have another question. I bought a 50 HP rotary screw compressor for
resale. I want to test it.

I realized today that it is 460v. Would this 45 kva transformer, be
able to run this compressor UNLOADED, just as a power up test -- not
pumping at full PSI.

Thanks