Advantages Of Two Wattmeter Method 5iz6b

Advantages of Two Wattmeter Method The various advantages of two wattmeter method are , The method is applicable for balanced as well as unbalanced loads. Neutral point for star connected load is not necessary to connect the wattmeters. The delta connected load, need not be opened for connecting the wattmeters. Only two wattmeters are sufficient to measure total 3 phase power. If the load is balanced not only the power but power factor also can be determined. Total reactive volt-amperes can be obtained using two wattmeters readings for balanced loads.

Disadvantages of Two Wattmeter Method The few disadvantages of this method are , Not applicable for three phase , 4 wire system The signs of W1 and W2 must be identified and noted down correctly otherwise it may lead to the wrong results.