Question

What's the calculated line current for a line wire serving a 3-phase load which is 12kVA per phase? (To the nearest ampere)

a) 75A
b) 85A
c) 90A
d) 100A

Answer 1

The calculated line current for a 3-phase load of 12kVA per phase is approximately 6920A.

Step-by-step explanation:

To calculate the line current for a 3-phase load, we need to divide the total load (12kVA per phase) by the square root of 3. The square root of 3 is approximately 1.732. So, the calculated line current is:

Line Current = (12kVA per phase) / (1.732) = 6.92kA

Converting kA to A, we have:

Line Current = 6.92kA x 1000 = 6920A

Therefore, the calculated line current is approximately 6920A (option d).