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Explain the measurement of 3&Straightphi power by two wattmeter method.
1 Answer
written 3.9 years ago by |
Consider star connected load and two wattmeters connected as shown in Fig.1
Fig.1 Two wattmeter method for star connected load
For balanced load:
Considering the above figure 1 in which Two Wattmeter W1 and W2 are connected, the instantaneous current through the current coil of Wattmeter, W1 is given by …