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Grid Grid Voltage 400 kV 3Ø SC Power 10000 MVAsc 3Ø SC Current 14.43 kA X/R Ratio 0 Step Up transformer Primary Voltage 400 kV Secondary Voltage 11 kV Apparaent power 125 MVA Primary FLA 180 A Secondary FLA 6561 A %Z 13 % Max. 3Ø Symm. Fault on 400 k 1.44 kA Max. 3Ø Symm. Fault on 11 kV 52.49 kA Step Down transformer Primary Voltage 11 kV Secondary Voltage 6 kV Apparaent power 18 MVA Primary FLA 945 A Secondary FLA 1732 A %Z 9 % Max. 3Ø Symm. Fault on 11 kV 10.50 kA Max. 3Ø Symm. Fault on 6 kV 19.25 kA Generator Load Nominal Voltage 11 kV Apparaent power 125.00 MVA Real Power 100.00 MW PF 0.80 FLA 6560.80 A xd" 20.00 % 3 Phase Symm. Fault 32.80 kA Aux 15.00% Loss 5.00% Total Export 100.00% Loss 5.00% Total

SC Calculation

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Page 1: SC Calculation

GridGrid Voltage 400 kV3Ø SC Power 10000 MVAsc3Ø SC Current 14.43 kAX/R Ratio 0

Step Up transformerPrimary Voltage 400 kVSecondary Voltage 11 kVApparaent power 125 MVAPrimary FLA 180 ASecondary FLA 6561 A%Z 13 %Max. 3Ø Symm. Fault on 400 kV 1.44 kAMax. 3Ø Symm. Fault on 11 kV 52.49 kA

Step Down transformerPrimary Voltage 11 kVSecondary Voltage 6 kVApparaent power 18 MVAPrimary FLA 945 ASecondary FLA 1732 A%Z 9 %Max. 3Ø Symm. Fault on 11 kV 10.50 kAMax. 3Ø Symm. Fault on 6 kV 19.25 kA

Generator LoadNominal Voltage 11 kVApparaent power 125.00 MVAReal Power 100.00 MWPF 0.80FLA 6560.80 Axd" 20.00 %3 Phase Symm. Fault 32.80 kA

Aux 15.00%Loss 5.00%Total

Export 100.00%Loss 5.00%Total

Page 2: SC Calculation

Grid 400 kV BusGrid Voltage 400 kV 3Ø Symm. Fault 16.93Ø SC Power 10000 MVAsc3Ø SC Current 14.43 kAX/R Ratio

Step Up transformerPrimary Voltage 400 kV 11 kV BusSecondary Voltage 11 kV 3Ø Symm. Fault 93.8Apparaent power 125 MVAPrimary FLA 180 ASecondary FLA 6561 A%Z 12.5 %Max. 3Ø Symm. Fault on 400 kV 1.44 kAMax. 3Ø Symm. Fault on 11 kV 52.49 kA

Step Down transformer 6 kV BusPrimary Voltage 11 kV 3Ø Symm. Fault 19.2Secondary Voltage 6 kVApparaent power 18 MVAPrimary FLA 945 ASecondary FLA 1732 A%Z 9 %Max. 3Ø Symm. Fault on 11 kV 10.50 kAMax. 3Ø Symm. Fault on 6 kV 19.25 kA

GeneratorNominal Voltage 11 kVApparaent power 125.00 MVAReal Power 100 MWPF 0.8FLA 6561 Axd" 20 %3 Phase Symm. Fault 32.8 kA

18.750.94

19.69

125.006.25

131.25

Page 3: SC Calculation

400 kV Bus kV kAkA MV Margin 1.1 11 32.8

400 0.90

11 kV Bus kV kAkA 400 14.4

11 525Final 52.49

6 kV Bus kV kAkA 11 93.8

6 172Final 19.25

Page 4: SC Calculation

GridGrid Voltage 400 kV3Ø SC Power 40000 MVAsc3Ø SC Current 57.74 kAX/R Ratio 0

Step Up transformerPrimary Voltage 400 kVSecondary Voltage 11 kVApparaent power 125 MVAPrimary FLA 180 ASecondary FLA 6561 A%Z 13 %Max. 3Ø Symm. Fault on 400 kV 1.44 kAMax. 3Ø Symm. Fault on 11 kV 52.49 kA

Step Down transformerPrimary Voltage 11 kVSecondary Voltage 0.4 kVApparaent power 9 MVAPrimary FLA 472 ASecondary FLA 12990 A%Z 7.5 %Max. 3Ø Symm. Fault on 11 kV 5.25 kAMax. 3Ø Symm. Fault on 0.4 kV 144.34 kA

Generator LoadNominal Voltage 11 kVApparaent power 58.82 MVAReal Power 50.00 MWPF 0.85FLA 3087.43 Axd" 20.00 %3 Phase Symm. Fault 15.44 kA

Aux 15.00%Loss 5.00%Total

Export 100.00%Loss 5.00%Total

Page 5: SC Calculation

Grid 400 kV BusGrid Voltage 400 kV 3Ø Symm. Fault 64.03Ø SC Power 40000 MVAsc3Ø SC Current 57.74 kAX/R Ratio

Step Up transformerPrimary Voltage 400 kV 11 kV BusSecondary Voltage 11 kV 3Ø Symm. Fault 74.7Apparaent power 125 MVAPrimary FLA 180 ASecondary FLA 6561 A%Z 12.5 %Max. 3Ø Symm. Fault on 400 kV 1.44 kAMax. 3Ø Symm. Fault on 11 kV 52.49 kA

Step Down transformer 0.4 kV BusPrimary Voltage 11 kV 3Ø Symm. Fault 144.3Secondary Voltage 0.4 kVApparaent power 9 MVAPrimary FLA 472 ASecondary FLA 12990 A%Z 9 %Max. 3Ø Symm. Fault on 11 kV 5.25 kAMax. 3Ø Symm. Fault on 0.4 kV 144.34 kA

GeneratorNominal Voltage 11 kVApparaent power 58.82 MVAReal Power 50 MWPF 0.85FLA 3087 Axd" 20 %3 Phase Symm. Fault 15.4 kA

8.820.449.26

58.822.94

61.76

Page 6: SC Calculation

400 kV Bus kV kAkA MV Margin 1.1 11 15.4

400 0.42

11 kV Bus kV kAkA 400 57.7

11 2099Final 52.49

0.4 kV Bus kV kAkA 11 74.7

0.4 2055Final 144.34