464 CHAPTER 8 SYMMETRICAL COMPONENTS
8.5 ' For the unbalanced three-phase system described by
I, =12LQ1A, 1;, = 6[90A, IC = 8[150A
compute the symmetrical components 10, 11, 12.
8.6 (a) Given the symmetrical components to be
V0 2 10[_0_V, V1 = 80[ 30 V, V
Power Distribution Systems
A fault results in an abnormal condition in
the power system.
High current, Low voltage
Faults are dangerous situations that can
hurt people and destroy equipment
Power System Fault
One advantage of balanced three-phase systems over separate singlephase systems is
reduced capital and operating costs of transmission and distribution.
(a) True (b) False
While the instantaneous electric power delivered by a single-phase gene