A. provide fresh air for cooling the transformer
B. supply cooling oil to transformer in time of need
C. protect the transformer from damage when oil expends due to heating
D. none of the above
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A. provide fresh air for cooling the transformer
B. supply cooling oil to transformer in time of need
C. protect the transformer from damage when oil expends due to heating
D. none of the above
A conservatory is a device that is used in power transformers to maintain a consistent oil level in the transformer tank. It works by allowing the oil to expand and contract due to changes in temperature while preventing the ingress of air into the transformer tank.
The transformer oil inside the transformer tank is used for insulation and cooling purpose, the oil temperature varies with the load and ambient temperature. When the oil gets heated up, it expands and when it gets cooled, it contracts. This change in volume causes the oil level in the transformer tank to fluctuate.
A conservatory is mounted on top of the transformer tank and it is connected to the transformer tank by a pipe. It allows the oil to expand and contract freely without allowing air to enter the transformer tank. This prevents the formation of air bubbles in the oil which can cause damage to the transformer.
A. Providing fresh air for cooling the transformer – is incorrect, as the transformer is cooled by the oil inside the transformer tank and not by fresh air. Fresh air is not used to cool the transformer.
B. supply cooling oil to the transformer in time of need – is incorrect, as the conservator does not supply cooling oil to the transformer, it simply maintains a consistent oil level in the transformer tank. The conservator does not add or remove oil from the transformer tank, it simply allows for the free expansion and contraction of oil within the tank.
D. none of the above – is incorrect as the correct answer is C. protect the transformer from damage when oil expands due to heating. The main function of the conservator is to protect the transformer from damage that can occur when oil expands due to heating.