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Assuming relay 6 in upstream as shown in figure below, which statement present the correct coordination rule for directional relays?

Assuming relay 6 in upstream as shown in figure below, which statement present the correct coordination rule for directional relays?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Assuming relay 6 in upstream as shown in figure below, which statement present the correct coordination rule for directional relays? 220/110 kV 50 MVA Z%=12.5 A 300/5 A 300/5 A 2 10,000 MVASC 6 300/5 A 300/5 A F4 F3 Grid 300/5 A 300/5 A 3 F1 220/110 kV 50 MVA Z%=12.5 F2 Select one or more: a. Relay 6 sees full fault current coordinating with R4 considering fault at F4 b. Relay 4 coordinates with relay 1 for a fault at F1 with one transformer feeder in service c. Relay 2 coordinates with relay 1 for faults at F1 with both transformer feeders in service O d. Relay 6 sees only 50% of the fault current coordinating with R4 considering fault at F4 and both transformer feeders in service by
Transcribed Image Text:Assuming relay 6 in upstream as shown in figure below, which statement present the correct coordination rule for directional relays? 220/110 kV 50 MVA Z%=12.5 A 300/5 A 300/5 A 2 10,000 MVASC 6 300/5 A 300/5 A F4 F3 Grid 300/5 A 300/5 A 3 F1 220/110 kV 50 MVA Z%=12.5 F2 Select one or more: a. Relay 6 sees full fault current coordinating with R4 considering fault at F4 b. Relay 4 coordinates with relay 1 for a fault at F1 with one transformer feeder in service c. Relay 2 coordinates with relay 1 for faults at F1 with both transformer feeders in service O d. Relay 6 sees only 50% of the fault current coordinating with R4 considering fault at F4 and both transformer feeders in service by
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