11kV Distribution System Fault Analysis using Symmetrical Components

1. Aug 11, 2015

lam58

Hi could someone check my answer to the question below.
Question:

$$I_{fA} = 3I_{1A} = 3I_{2A} = 3I_{0A} \Rightarrow I_{fA} = \frac{3E}{Z_1 + Z_2 + Z_0} = \frac{33kV}{20+20+30} = 471.43A$$

Then using the same method I got $$I_{fB} = 942.86A$$

2. Aug 16, 2015