electrical fault inside the transformer itself
electrical fault outside the transformer in outgoing feeder
for both outside and inside faults
none of the above
Answer is Right!
Answer is Wrong!
The correct answer is: A. electrical fault inside the transformer itself.
Buchholz’s relay is a type of protective relay that is used to detect and protect transformers against internal faults. It does this by monitoring the pressure and gas content of the transformer’s oil. If a fault occurs, the relay will detect the increase in pressure and gas content and trip the transformer off, preventing further damage.
Option B is incorrect because Buchholz’s relay cannot detect faults that occur outside the transformer. Option C is incorrect because Buchholz’s relay is not designed to protect against both inside and outside faults. Option D is incorrect because Buchholz’s relay is a real and effective type of protective relay.