How is UPF Wattmeter different from LPF Wattmeter?
Siva
Apr 21st, 2017
LPF Watt meters are specially designed to measure the power at low power factor (inductive circuits).
UPF type Watt meters are not so accurate in measuring power at low factor (resistive circuits).
sharath
Oct 28th, 2011
LPF watt meter is used for measuring power in highly inductive circuits & UPF watt meter is used for measure power in resistance circuit in which the power factor ranges from 0.5 to unity.
