Calculate the resistance of Line 1 (referred to 34.5 kV), the reactance of ransformer T3 (referred to 34.5 kV) and the refered reactance of Line 3 to 34.5 kV.

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Calculate the resistance of Line 1 (referred to 34.5 kV), the reactance of ransformer T3 (referred to 34.5 kV) and the refered reactance of Line 3 to 34.5 kV.

Find Short Circuit breaking capacity (powers) of circuit breakers, A1, A2 and A3. (μ=0.8).
Xcu=56 m/mm²
B
Linel
T3
881-10|-|·
A2
Line2
34.5 kV
G1
G2
T1
T2
A1
A
34.5 kV
G1 generator : 10 kV, 30 MVA, Ed=%12
G2 generator: 10 kV, 40 MVA, Ed=%12
T1 transformer: 10/34.5 kV, 35 MVA, Uk=%8
T2 transformer: 10/34.5 kV, 45 MVA, Uk=%9
Line1 and Line2: X=0.12 2/km, q=240 mm², L=8 km
T3 transformer: 34.5/6 kV, 25 MVA, uk=%6
Line3: X=0.14 02/km, q=95 mm², L=4 km
6 kV
Line3
D
A3
6 kv
Transcribed Image Text:Find Short Circuit breaking capacity (powers) of circuit breakers, A1, A2 and A3. (μ=0.8). Xcu=56 m/mm² B Linel T3 881-10|-|· A2 Line2 34.5 kV G1 G2 T1 T2 A1 A 34.5 kV G1 generator : 10 kV, 30 MVA, Ed=%12 G2 generator: 10 kV, 40 MVA, Ed=%12 T1 transformer: 10/34.5 kV, 35 MVA, Uk=%8 T2 transformer: 10/34.5 kV, 45 MVA, Uk=%9 Line1 and Line2: X=0.12 2/km, q=240 mm², L=8 km T3 transformer: 34.5/6 kV, 25 MVA, uk=%6 Line3: X=0.14 02/km, q=95 mm², L=4 km 6 kV Line3 D A3 6 kv
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