Engineering Board Exam Reviewer · Three-Phase Systems in Power Applications · medium
A balanced delta-connected load, with Z=24+j18, in each phase, is supplied from a three-phase line of 208 V (line-to-line, rms). Find the line current.
- 12 A
- 6.93 A
- 4 A
- 20.8 A
Answer
A. 12 A
Solution
In a delta connection each phase impedance sees the full line voltage: Iph=VL/|Z|= 208 V30, =6.93 A. IL= 3,Iph= 3(6.93 A)=12 A.
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