you're wrong. no you're stupid. well you're stupider so there.

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Besoeker

Senior Member
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really?

we know this
1000 hp
4000 v
122 a
I think it would be 4160V on the nameplate.

An example:

702527.jpg
 
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Ingenieur

Senior Member
Location
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Perhaps we should wait for factual data rather than make assumptions.

We ALL should do that re: pwm noise, saturation, etc lol
he said it was a motor? the load is not a motor?

we know this from the op:
840 kva
1000 hp
4kv class
875 kva xfmr
1200 a drive
 

Besoeker

Senior Member
Location
UK
before you run a 4kv 1000 hp motor wouldn't voltage be the first thing checked?
especially with filters, step up xfmrs, etc?
Direct measurement of 4160V would require specific instrumentation and we don't know that it was checked.
 
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Ingenieur

Senior Member
Location
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4160V according to the OP.
so it is a motor?
and it is getting 4160? so no undervoltage?
convention is 4 kv
like a 480 nominal system voltage motor is rated 460

regardless, we cleared that up, we know the primary load is a motor
with a sine filter
and the xfmr loaded to <96% depending where the measurement was taken
likely closer to 85-90%
 

Ingenieur

Senior Member
Location
Earth
Direct measurement of 4160V would require specific instrumentation and we don't know that it was checked.

if you build 4kv motors you will have ppe and tools for working on them

apparently that is where they measured the 840 kva
usually by measuring v and i
especially since they believe the xfmr output was limited to that value
they could not determine that measuring on the lv side due to xfmr consumption
 
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