All Questions
4 questions
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Is the same overcurrent relay used for both phase-to-phase faults and 3-phase faults?
In MV grid with no distributed generators, 50-51 overcurrent relays are used to detect both phase to phase faults anf 3-phase faults.
In Italy, time independent characteristics are used inside these ...
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1
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259
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Difference between a relay and a fault passage indicator (FPI)?
What is the difference between a fault passage indicator (FPI) and a relay (for example relay 50, 51, 67N) ? Are they the same thing?
-1
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Can a solid state relay be energized from the same 120V AC source that it switches?
Can a 120V AC input / AC output solid state relay be energized with the same 120V source connected to its contacts?
This can't be done with an electromechanical relay because it generates feedback and ...
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0
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2
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Ordinary Differential Relay Problem
The answer given in my workbook to the above problem is A.
The things I was able to point out
secondary c-phase current = 300A and other secondary phase currents = 0A since the entire current ...
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