. Two wattmeters connected to measure the input to a balanced three-phase circuit indicate 2500 W and 500 W respectively. Find the power factor of the circuit: (a) when both readings are positive; (b) when the latter reading is obtained after reversing the con nections to the current-coil of one instrument. Draw the phasor and connection diagrams. ANS:  0.655, 0.359

Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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. Two wattmeters connected to measure the input to

a balanced three-phase circuit indicate 2500 W and

500 W respectively. Find the power factor of the

circuit: (a) when both readings are positive; (b) when

the latter reading is obtained after reversing the con

nections to the current-coil of one instrument. Draw

the phasor and connection diagrams.

ANS: 

0.655, 0.359

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