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Answer :

A Buchholz relay can be installed on oil cooled transformers.

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Description : Buchholz relay is  (1) located in the conservator tank  (2) located in the transformer tank itself  (3) connected in the pipe connecting main tank of transformer and conservator  (4) installed in the circuit breaker

Answer : Buchholz relay is connected in the pipe connecting main tank of transformer and conservator 

Description : Buchholz relay is used as a safety device with respect to which of the following? A) Audio transformers B) Oil filled power transformers C) Air core transformer D) None of these

Answer : Buchholz relay is used as a safety device with respect to which of the following? A) Audio transformers B) Oil filled power transformers C) Air core transformer D) None of these

Description : What is the use of Buchholz relay in transformer?

Answer : This is a transformer that is used to step up and down current. 

Description : 1] A Buchholz relay can be installed on A. Auto-transformers B. Air-cooled transformers C. Welding transformers D. Oil cooled transformers

Answer : Buchholz's relay gives warning and protection against electrical fault inside the transformer itself.