Buchholz Relay in Transformers Quiz

What is the primary function of a Buchholz relay in a transformer?

• To increase the voltage

• To cool the transformer

• To protect from internal faults

• To enhance power efficiency

In what type of transformers is a Buchholz relay generally used?

• Air-cooled transformers

• Oil immersed transformers

• Dry-type transformers

• Small transformers under 500 kVA

What does the excess heat in a transformer lead to in the context of a Buchholz relay?

• Cooling of the transformer

• Production of gas

• Increase in voltage

• Decrease in current

What happens to gas bubbles generated inside a transformer?

• They cool the transformer

• They flow downward

• They flow upward towards the conservator

• They remain static

What happens when gas displaces oil in the Buchholz relay?

• The transformer shuts down

• The upper float closes the mercury switch

• The oil level rises

• The relay resets

What is the role of the lower float in a Buchholz relay during major faults?

• It activates the cooling system

• It tilts to close the lower mercury switch

• It releases excess gas

• It stabilizes the oil level

What type of fault generates a large amount of gas in a Buchholz relay?

• Minor fault

• Major fault

• Electrical noise

• Mechanical fault

What is the primary function of a Buchholz relay?

• To increase transformer efficiency

• To indicate internal faults due to heating

• To regulate oil levels

• To enhance power output