Examl (13 Marks) Problem: The system with two incoming lines is given in Figure 1: Generator Gl: 80MVA,13.8 KV. • Genera

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Examl 13 Marks Problem The System With Two Incoming Lines Is Given In Figure 1 Generator Gl 80mva 13 8 Kv Genera 1 (43.06 KiB) Viewed 13 times

Examl (13 Marks) Problem: The system with two incoming lines is given in Figure 1: Generator Gl: 80MVA,13.8 KV. • Generator G2: 120MVA, 13.8 KV. • Transformer T1: 80 MVA 13.8/115 τει ΦΗ]ς το X=8% • Transformer T2: 120 MVA 13.8/11 X=10% TEDESCO overcurrent protection directional overcurrent Protection ... and t, times delay • H1,H2,A1,A2,D1,D2, circuits brea TO TOH 30 Tity with two Answer the questions 1) Choose breakers H1, A2 and DI 2) Choose CTI,CT3,TC5 and VT 3) It is assumed short-circuit at points 1,2 and 3. What is commandment clippings relay respecting discriminator interval (At). 4) In the power system in figure 1. three phase short circuit in point 1 • The maximum load is 500A • All relays are CO-8 • Coordination time (At=300 ms) • Ks=150% • Find TAP and TDS of relays D2. Interpret a time delay to . Fin the times delayst, and ty .