1. Exciter and rotor winding are isolated from earth, so how can you detect an earth fault in the rotor circuit? 2. Mark the protection zone for the differential relay, which relay protects if the fault appears outside this zone.

Electric Motor Control
10th Edition
ISBN:9781133702818
Author:Herman
Publisher:Herman
Chapter14: Phase Failure Relays
Section: Chapter Questions
Problem 1SQ: What is the purpose of phase failure relays?
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I need answer within 20 minutes please please with my best wishes
1. Exciter and rotor winding are isolated from earth, so how can you detect an earth fault
in the rotor circuit?
2. Mark the protection zone for the differential relay, which relay
protects if the fault appears outside this zone.
Transcribed Image Text:1. Exciter and rotor winding are isolated from earth, so how can you detect an earth fault in the rotor circuit? 2. Mark the protection zone for the differential relay, which relay protects if the fault appears outside this zone.
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