Question
Download Solution PDFPower measured using 2 wattmeter method from a three-phase balanced/unbalanced load where line voltage = VP, Line current = VL, Phase voltage = VP and Phase current = lP is given by:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFTwo Wattmeter Method of Power Measurement
The Wattmeter Method can measure power in a 3 phase, three-wire star, delta-connected, balanced, or unbalanced load.
In the wattmeter method, the current coils of the wattmeter are connected with any two lines, say R and Y, and the potential coil of each wattmeter is joined on the same line, the third line i.e. B as shown in the figure.
The total power is given by:
The wattmeter meter readings are:
where,
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