Question
Download Solution PDFIn 3 phase power measurement by two watt meter methods reading can be same in both wattmeters then the power factor is____.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFMeasurement of power
According to Blondel's Theorem, for the measurement of power in n-phase, n-wire without neutral, (n-1) wattmeters are required.
For measurement of power in 3-phase, (3-1 = 2) wattmeters are required.
The readings of both the wattmeters are given by:
At ϕ = 0°, the readings of both the wattmeters are the same and are equal to
The power factor at ϕ = 0° is given by:
Power factor = cosϕ
Power factor = cos 0° = Unity
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