Question #5 Distance Relays & R-X Diagrams a) A line section has an impedance of 2.8 + j5 Q. Show this on an R-X diagram, as impedanc vector. b) If the relay is adjusted to operate for a zero-impedance short circuit at the end of the line section, show on the same R-X diagram the characteristic of: i. Impedance relay ii. Reactance relay iii. Mho relay c) Identify on the plot where is the area of the operating region for the Impedance Relay? d) Which relay is inherently directional?

Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.56P: Three single-phase two-winding transformers, each rated 3kVA,220/110volts,60Hz, with a 0.10 per-unit...
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Question #5
Distance Relays & R-X Diagrams
a) A line section has an impedance of 2.8 + j5 . Show this on an R-X diagram, as impedance
vector.
b) If the relay is adjusted to operate for a zero-impedance short circuit at the end of the line
section, show on the same R-X diagram the characteristic of:
i. Impedance relay
ii. Reactance relay
iii. Mho relay
c) Identify on the plot where is the area of the operating region for the Impedance Relay?
d) Which relay is inherently directional?
Transcribed Image Text:Question #5 Distance Relays & R-X Diagrams a) A line section has an impedance of 2.8 + j5 . Show this on an R-X diagram, as impedance vector. b) If the relay is adjusted to operate for a zero-impedance short circuit at the end of the line section, show on the same R-X diagram the characteristic of: i. Impedance relay ii. Reactance relay iii. Mho relay c) Identify on the plot where is the area of the operating region for the Impedance Relay? d) Which relay is inherently directional?
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