this motor. Ans. 4.2/36.9° 14.27. A 25 hp three-phase, induction motor with a full load efficiency of 82% and a power factor of .75 is connected to a 208 volt system. Find the equivalent delta-connected impedance which can replace this motor and find the readings obtained by the two-wattmeter method. Ans. 4.28/41.4°; 5.58 kw, 17.15 kw

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14.27 pls

Ans. 4.26/–70°, 4.26/50°, 4.26/170°; 3320 w
14.26. A 50 hp induction motor with a full load efficiency of 85% and a power factor of .80 is connected
to a three-phase, 480 volt system. Find the equivalent wye-connected impedance which can replace
this motor.
Ans. 4.2/36.9°
14.27. A 25 hp three-phase, induction motor with a full load efficiency of 82% and a power factor of .75
is connected to a 208 volt system. Find the equivalent delta-connected impedance which can replace
this motor and find the readings obtained by the two-wattmeter method.
Ans. 4.28/41.4°; 5.58 kw, 17.15 kw
Three identical impedances of 9/-30° ohms in delta and three impedances of 5/45° ohms in wye
are both connected to the same three-phase, three-wire, 480 volt, ABC system. Find the magnitude
of the line current and the total power.
14.28.
Ans. 119.2; 99 kw
bed mith impedenees
Transcribed Image Text:Ans. 4.26/–70°, 4.26/50°, 4.26/170°; 3320 w 14.26. A 50 hp induction motor with a full load efficiency of 85% and a power factor of .80 is connected to a three-phase, 480 volt system. Find the equivalent wye-connected impedance which can replace this motor. Ans. 4.2/36.9° 14.27. A 25 hp three-phase, induction motor with a full load efficiency of 82% and a power factor of .75 is connected to a 208 volt system. Find the equivalent delta-connected impedance which can replace this motor and find the readings obtained by the two-wattmeter method. Ans. 4.28/41.4°; 5.58 kw, 17.15 kw Three identical impedances of 9/-30° ohms in delta and three impedances of 5/45° ohms in wye are both connected to the same three-phase, three-wire, 480 volt, ABC system. Find the magnitude of the line current and the total power. 14.28. Ans. 119.2; 99 kw bed mith impedenees
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