[amp_mcq option1=”electrical fault inside the transformer itself” option2=”electrical fault outside the transformer in outgoing feeder” option3=”for both outside and inside faults” option4=”none of the above” correct=”option1″]
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.