Example 2 HV Ti MV Vely Load A Ska Data: S'ha = 1200 MVA Power system: Short-circuit power Power line Li: Length: Cross sectional: Reactance per unit: 1 = 10 km S = 240 mm (AFL-6 240) X; = 0,4/km Conductivity: YAL = 34 A-mm2 Transformer Ti: Rated power: Sn = 25 MVA Short-circuit voltage: Uz = 11% Transformer voltage ratio: 9 = 121/15,75 kV Copper losses: AP cu = 110 kW Line L2: Length: 1 = 5 km Cross sectional: S = 70 mm (XRUHAKXS 3x70) Reactance per unit: X; = 0,1/km m Conductivity: n.mm Short-circuit time tz = 1 sec. Jis =? - find in example 1. mm2 Check out line L2 on short-circuit strength. VAL = 35,38 Example 2 HV Ti MV Vely Load A Ska Data: S'ha = 1200 MVA Power system: Short-circuit power Power line Li: Length: Cross sectional: Reactance per unit: 1 = 10 km S = 240 mm (AFL-6 240) X; = 0,4/km Conductivity: YAL = 34 A-mm2 Transformer Ti: Rated power: Sn = 25 MVA Short-circuit voltage: Uz = 11% Transformer voltage ratio: 9 = 121/15,75 kV Copper losses: AP cu = 110 kW Line L2: Length: 1 = 5 km Cross sectional: S = 70 mm (XRUHAKXS 3x70) Reactance per unit: X; = 0,1/km m Conductivity: n.mm Short-circuit time tz = 1 sec. Jis =? - find in example 1. mm2 Check out line L2 on short-circuit strength. VAL = 35,38