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 / sridhar
lpf is stands for lagging power factor and upf stands for unity power factor and lpf where used in pure inductive load oriented where as upf where used in pure resistive load oriented. This is the main difference usage in experiments.
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