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Measuring peak power for rating plate

M. Joshi
I would like to measure the peak power drawn by various pieces of equipment individually so that the figure can be shown on each equipment's rating plate.


I'm considering using the peak demand function on a MID power meter but, using 0.5s/0.2s CTs instead for better accuracy.  Is this approach acceptable?
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    I would expect that peak power would have to relate to steady state conditions, else for motors you would need to consider starting conditions and maybe locked rotor power.


    If you consider why we might need to state peak power at all, then I guess it becomes clearer whether or not we need to worry about short term / in-rush conditions when writing a number on the name plate.  Also, you could always state the required protective device in addition to load characteristics which in your case might be more useful.
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    I would expect that peak power would have to relate to steady state conditions, else for motors you would need to consider starting conditions and maybe locked rotor power.


    If you consider why we might need to state peak power at all, then I guess it becomes clearer whether or not we need to worry about short term / in-rush conditions when writing a number on the name plate.  Also, you could always state the required protective device in addition to load characteristics which in your case might be more useful.
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