In message <l9afub+10tlbe4@...>, dated Mon, 23 Dec 2013,
sawreyrw@... writes:
The 2 wattmeter method will work, but to avoid building a model of the
wattmeters, it?would easier?to simply use the LTspice power plotting
feature.? You can easily get a numerical display of the power.? To get
total power you need to add the power in each phase.
The OP asked how to do it in real life, and that is what I posted.
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John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK