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Electricity getting very expensive in the Workshop

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PekkaNF:
Power factor on measurement? Resistive loads are fairly easy to use for calibration. I am sure you have factored this in.

hermetic:
Can you get a tong tester round the input phases and get a current reading for each phase?

awemawson:
Probably Phil. I certainly used to have at least three Ferranti clamp amp metres - certainly still have one but may have given the others away over the years.

awemawson:
Now this is getting REALLY curious - I don't quite understand what is happening.

Running the machine up to the point that the motor can be started under program control, but NOT running, the OWL is telling me it's drawing about 3kw which is not unexpected.

Starting the motor and running it at a steady 1000 rpm at the spindle (through a belt / gear train so not motor rpm) my Fluke clamp ammeter is showing approx 16, 17, and 18 amps on the three phase inputs to the machine.

Now the OWL is showing about 11 kw attributable to the Beaver lathe (other things drawing a few 100 watts)

Now under these circumstances the other day it was drawing 26 kw, and I'm not imagining it as I have the photographs !

So I don't  really understand what is going on  :scratch:

vtsteam:
What kind of functions does the Owl have -- Hold, or Peak?

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