A three-phase ∆-connected generator is driving a balanced load such that each phase current is 12 A in magnitude. When Iθa = 12 ∠30° A, what are the polar expressions for the other phase currents?
A. Iθb = 12 ∠150° A, Iθc = 12 ∠-90° A
B. Iθb = 12 ∠120° A, Iθc = 12 ∠30° A
C. Iθb = 12 ∠30° A, Iθc = 12 ∠120° A
D. Iθb = 12∠ 90° A, Iθc = 12 ∠90° A
Answer: Option A
This Question Belongs to Electrical Engineering >> Three Phase Systems In Power Applications
I θa = 12 ∠30° A
Angle difference between each phase is 120
I θb = 12 ∠(30+120)° A= 12 ∠150° A
I θc = 12 ∠(30-120)° A=12 ∠-90° A