From Figure 3, given the parameters below, calculate the 3-phase fault and X/R ratio at Fault 1, Fault 2 and Fault 3:
- Utility
Available Fault = 436 MVA
X/R = 15 - Cable 1
Length = 1300 m
Unit Resistance = 0.39 ohms/km
Unit Reactance = 0.039 ohms/km
Number of parallel conductors / phase = 1 - Transformer
Primary Voltage = 13.8 kV
Secondary Voltage = 0.48 kV
Capacity = 2 MVA
%Z = 5.75%
X/R = 5.662 - Cable 2
Length = 500 m
Unit Resistance = 0.048 ohms/km
Unit Reactance = 0.029 ohms/km
Number of parallel conductors / phase = 2