Handbook of Electrical Engineering

272 HANDBOOK OF ELECTRICAL ENGINEERING

Figure 11.3 One-line diagram of faulted low voltage system.

Figure 11.4 Equivalent circuit of faulted low voltage system.

Table 11.2. Impedance data values

Item R1 X1 R2 X2 R3 X3 R4 X4

T1 0.0333∗pu 0.6∗pu
3c-240 mm^2 0.01976 0.0146
Cable C1 0.1815∗pu 0.1343∗pu
T2 0.35∗pu 3 ∗pu
Busbars 0.000086 0.00044
B1 0.0444∗pu 0.2273∗pu
∗per unit at 100 MVA base.