A 380 V, 144 HP,4 poles, 50 Hz, 0.9 leading Power Factor, A-connected synchronous motor has an armature resistance of 0.0 N, and a synchronous reactance of 2. N. This motor is operating at lA = 80 Amperes, PF= 0.9 Leading The field current is changed until this motor operates at unity power factor under the same load. Find | lAl, and EA- Select one: O a. |lA= 72.0 A , and EA = 406.3 L +20.75 ° Volts O b. |lA| = 72.0 A , and EA = 406.3 L-20.75 ° Volts O c. |lA|= 88.9 A , and EA = 474.5 L+25.07 ° Volts O d. None O e. lA = 88.9 A , and EA = 419.5 L-25.07 ° Volts
A 380 V, 144 HP,4 poles, 50 Hz, 0.9 leading Power Factor, A-connected synchronous motor has an armature resistance of 0.0 N, and a synchronous reactance of 2. N. This motor is operating at lA = 80 Amperes, PF= 0.9 Leading The field current is changed until this motor operates at unity power factor under the same load. Find | lAl, and EA- Select one: O a. |lA= 72.0 A , and EA = 406.3 L +20.75 ° Volts O b. |lA| = 72.0 A , and EA = 406.3 L-20.75 ° Volts O c. |lA|= 88.9 A , and EA = 474.5 L+25.07 ° Volts O d. None O e. lA = 88.9 A , and EA = 419.5 L-25.07 ° Volts
Introductory Circuit Analysis (13th Edition)
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Chapter1: Introduction
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Transcribed Image Text:A 380 V, 144 HP, 4 poles, 50 Hz, 0.9 leading Power Factor, A-connected synchronous motor has an armature resistance of 0.0 Q, and a
synchronous reactance of 2. N.
This motor is operating at la = 80 Amperes, PF= 0.9 Leading
The field current is changed until this motor operates at unity power factor under the same load. Find | IA|, and EA.
Select one:
O a. |lAl = 72.0 A , and E = 406.3 L +20.75 ° Volts
O b. | lA|= 72.0 A , and EA = 406.3 L-20.75 ° Volts
O c. | lA|= 88.9 A , and Ea = 474.5 L+25.07 ° Volts
O d. None
O e. lA = 88.9 A , and EA = 419.5 L-25.07 ° Volts
Clear my choice
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