Answer Question 3: Show work Calculation of CTs For the system shown in the Figure, carry out the following calculations

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Answer Question 3 Show Work Calculation Of Cts For The System Shown In The Figure Carry Out The Following Calculations 1 (60.49 KiB) Viewed 42 times

Answer Question 3: Show work Calculation of CTs For the system shown in the Figure, carry out the following calculations: 1. Three phase fault calculations at all buses. The short circuit for Bus A is given. 2. Currents for normal operation 3. Calculations of CTs 4. The settings of the phase instantaneous units 5. The, pick-up and time dial settings for time delayed units in order to guarantee a co-ordinated protection system, allowing a time discrimination margin of 0.4 s. Icc 30 5900 A Dy B 115 kV X 9 115/34.5 KV 31.45 MVA Picp1102%=9.8 110/13.2 kV 41.75 MVA Z%=9,8 D X1 0 10 MVA 6 Dy Dy 8 11.2 km J0.625 0/km X7 A 4 CO-115 character 115/34.5 kV 31.245 MVA Z%=10 115 kV during the 34.5 kV X2 X3 TI 20 MVA 20MVA X10 50 MVA