Zone 1 Zone 2 T1 T2 Line 1 100MVA Yz Y+ Yz Yz ww Vrated 20kV G Z+=30+j95 ohms X"X" 20.0% X"0 = 6.0% ZO 80+j225 ohms 125MVA 75 MVA 20kV/230kV %IX = 7.0 230kV/44kV %IX = 6.0 Zone 3 Line 2 ww Z+22+ j57 ohms ZO 66+j205 ohms
Assume that for Line 1 and Line 2, Z- = Z+.
Assume that for T1 & T2, Z+ = Z- = Z0 = specified value.
Use an Sbase value of 100MVA. Use the transformer rated nameplate voltages as the base voltage in each zone.
Assume that the generator is operating at 19.0kV∠0.
Answer using digits only, e.g. 20,000, not 20kV. Do not include units. Do not include "j" for imaginary values.
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What is the adjusted per unit negative sequence impedance of T1 ?
Integer, decimal, or E notation allowedQuestion 2
What is the magnitude of the zero sequence per unit impedance of Line 1 ?
Integer, decimal, or E notation allowedQuestion 3
What is the adjusted positive sequence per unit impedance of T2 ?
Integer, decimal, or E notation allowedQuestion 4
What is the magnitude of the negative sequence per unit impedance of Line 2 ?
Integer, decimal, or E notation allowedQuestion 5
What is the magnitude of the power system fault current at the generator for a three phase fault at the end of Line 2 ?Integer, decimal, or E notation allowedQuestion 6
What is the magnitude of the power system fault current at the point of the fault for a three phase fault at the end of Line 2 ?
Integer, decimal, or E notation allowedQuestion 7
What is the magnitude of the power system current at the point of the fault for a line to ground fault at the high voltage terminal of T2 ?Integer, decimal, or E notation allowedQuestion 8
What is the magnitude of the power system B phase current at the point of the fault for a B phase to C phase fault at the HV terminal of T
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