A distance relay is located at Bus A that looks outwards toward Bus C as shown in the diagram below.
Zone 1 of the distance relay covers transmission line AB and Zone 2 covers just beyond Bus C.
A fault occurs on Bus C. When Generator B is online and breaker 52 is closed, which of the following statements is true?
A)Generator B connected to the system has no effect on how the impedance relay sees a fault at Bus C.
B) With Generator B connected, the impedance seen by the relay appears to be greater.
C) The more current Generator B provides to Bus B, the more likely the relay will trip from Zone 1.
D)None of the above
I am lost on the answer.
B? Gen B will support Voltage in line BC in turn raising impedance.
Lee is on the right track. Figured I give a little hint since no one got it yet.
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