when we have to use UPF wattmeter and LPF wattmeter?
what is the difference between UPF and LPF wattmeter in
terms of construction?
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Answer Posted / k .balaji singh
As we know the difference between upf and lpf as for resistive loads we use upf as resistive loads are which rise in temperature while passing current in electrical and in mechanical the break drum is a resistive load so while coming to inductive load which we use lpf low power factor wattemeter as inductive loads as inductor which does not draw that much current comare to resistor.
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