Dakshinanchal Vidyut Vitran Nigam Interview Questions and Answers

India is a diverse country with a rich cultural heritage. Railtel Corporation of India is a public sector enterprise that provides telecom infrastructure services.

• India is the second-most populous country in the world with a population of over 1.3 billion people.

• India is known for its diverse culture, languages, and religions.

• Railtel Corporation of India is a public sector enterprise that provides telecom infrastructur...read more

The current carrying capacity of conductors varies depending on their material and size.

• The current carrying capacity of a conductor is determined by its cross-sectional area.

• Conductors with larger cross-sectional areas can carry more current.

• The material of the conductor also affects its current carrying capacity.

• Copper is a commonly used conductor material with high current carrying capacity.

• Aluminum is another condu...read more

SLD of 132/33kV & 33/11kV substations

• SLD stands for Single Line Diagram

• 132/33kV substation SLD shows the transmission line, transformer, circuit breaker, isolator, etc.

• 33/11kV substation SLD shows the distribution line, transformer, circuit breaker, isolator, etc.

Field tests required before commissioning of power transformers include insulation resistance test, turns ratio test, and polarity test.

• Insulation resistance test is conducted to ensure the insulation system is intact and can withstand the operating voltage.

• Turns ratio test is performed to verify the turns ratio of the transformer and ensure it meets the design specifications.

• Polarity test is carried out to confirm the...read more

Finalizing a JMC involves several steps to ensure its accuracy and completeness.

• Review and verify all data and calculations

• Ensure compliance with all relevant regulations and standards

• Obtain necessary approvals and signatures

• Prepare final report or documentation

• Archive all relevant documents for future reference

Necessary steps before commissioning a substation

• Performing insulation resistance tests

• Checking the grounding system

• Verifying the correct functioning of protection relays

• Testing the transformer and circuit breakers

• Ensuring proper labeling and documentation

• Conducting a thorough safety inspection