Question

G 150MVA 25KV $X_d^{''} = 0.21 \text{pu}$ 2 150MVA 25KV: 230KV $X_T = 0.15 \text{pu}$ 1 System 100MVA 230KV $X_l = 0.15 \text{pu}$

          G
150MVA
25KV
$X_d^{''} = 0.21 \text{pu}$
2
150MVA
25KV: 230KV
$X_T = 0.15 \text{pu}$
1
System
100MVA
230KV
$X_l = 0.15 \text{pu}$

G
150MVA
25KV
Xd^” = 0.21 pu
2
150MVA
25KV: 230KV
XT = 0.15 pu
1
System
100MVA
230KV
Xl = 0.15 pu

Added by Fernando M.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert David Morabito

Step 1

To calculate the fault current at Bus #1, we need to use the short circuit MVA at that bus. In this case, the short circuit MVA at Bus #1 is 100MVA. Show more…

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Given the following single line diagram, where a generator is connected to a power system: A) Calculate the fault current (in actual Amperes) for the 3-phase fault at Bus #1 and Bus #2. B) Determine the best CT ratio to be installed at these buses. 2 System 100MVA 150MVA 25KV (50MVA 25KV; Q=30KV X=0.15pu X=0.15pu