Q.

Malfunctioning of the Buchholz relay may be caused due to 

  • AHeavy external short circuits
  • BImproper breather action
  • CDropping of oil level below the relay level during operation
  • DExcessive overheating 
Correct Answer : (C)

Dropping of oil level below the relay level during operation

Hints :

Malfunctioning of the Buchholz relay may be caused due to Dropping of oil level below the relay level during operation.

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