SSC Exam > SSC Questions > Bucholtz relay cannot be used on-a)500 kV tr...
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Bucholtz relay cannot be used on-
- a)500 kV transformer
- b)1000 kV transformer
- c)Three-phase transformer
- d)Air-cooled transformer
Correct answer is option 'D'. Can you explain this answer?
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Bucholtz relay cannot be used on-a)500 kV transformerb)1000 kV transf...
Oil should be present.
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Bucholtz relay cannot be used on-a)500 kV transformerb)1000 kV transf...
Explanation:
Buchholz relay is a protective device used in oil-filled transformers and reactors. It is designed to detect and respond to faults that occur in the oil-filled equipment. The Buchholz relay is connected in between the transformer tank and the oil conservator.
Reason for not using Buchholz relay on an air-cooled transformer:
Buchholz relay is not used on an air-cooled transformer because it relies on the movement of oil inside the transformer for its operation. Since air-cooled transformers do not have oil, Buchholz relay cannot be used to detect faults in such transformers.
Other options:
1. 500 kV transformer: Buchholz relay can be used on a 500 kV transformer. The voltage level of the transformer does not affect the use of the Buchholz relay. It is designed to operate at various voltage levels.
2. 1000 kV transformer: Buchholz relay can also be used on a 1000 kV transformer. The voltage level does not pose any restriction on the use of the Buchholz relay.
3. Three-phase transformer: Buchholz relay can be used on a three-phase transformer. It is designed to detect faults in both single-phase and three-phase transformers.
Therefore, the correct answer is option 'D' which states that Buchholz relay cannot be used on an air-cooled transformer.
Buchholz relay is a protective device used in oil-filled transformers and reactors. It is designed to detect and respond to faults that occur in the oil-filled equipment. The Buchholz relay is connected in between the transformer tank and the oil conservator.
Reason for not using Buchholz relay on an air-cooled transformer:
Buchholz relay is not used on an air-cooled transformer because it relies on the movement of oil inside the transformer for its operation. Since air-cooled transformers do not have oil, Buchholz relay cannot be used to detect faults in such transformers.
Other options:
1. 500 kV transformer: Buchholz relay can be used on a 500 kV transformer. The voltage level of the transformer does not affect the use of the Buchholz relay. It is designed to operate at various voltage levels.
2. 1000 kV transformer: Buchholz relay can also be used on a 1000 kV transformer. The voltage level does not pose any restriction on the use of the Buchholz relay.
3. Three-phase transformer: Buchholz relay can be used on a three-phase transformer. It is designed to detect faults in both single-phase and three-phase transformers.
Therefore, the correct answer is option 'D' which states that Buchholz relay cannot be used on an air-cooled transformer.
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