Engineering Balanced star connected circuit measurements

AI Thread Summary
The discussion focuses on measuring various electrical parameters in a balanced star-connected circuit, including phase and line voltages, line and neutral currents, and total power dissipated in the load. Key measurements include a phase voltage (VP) of 150V, line voltage (VL) of 265V, line current (IL) of 2.5A, and neutral current (IN) of 0A. The total power (P) calculated is 1290W, with both P1 and P2 equal to 645W. It is concluded that since the circuit is purely resistive, there is no reactive power (Q) or power factor. The analysis emphasizes the importance of understanding the relationship between these measurements in electrical circuits.
Steve Collins
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Measure phase and line voltages.
Measure currents in the three lines and neutral.
Measure total power dissipated in the load.
Calculate total apparent power absorbed by the load.
Determine power factor.
Draw phasor showing voltages and currents.P=P1 + P2

Q = √3(P2 - P1)

|S| = √(P2+Q2)

θ = tan-1(Q/P)Measurements taken

VP = 150V

VL = 265V

IL = 2.5A

IN = 0A

P1 = 645W

P2 = 645W

So,

P = 645 + 645 = 1290W

Q=√3(645 - 645) = 0 VAR ?
 
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After a brisk walk to the shops in the snow I have realized that this is a purely resistive circuit so there is no Q or power factor.
 

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