Podcast
Questions and Answers
What is the main purpose of switchgear?
What is the main purpose of switchgear?
- To distribute power to customers
- To operate at high voltages
- To generate electrical power
- To control and protect electrical circuits and equipment (correct)
Why can't a tumbler switch with an ordinary fuse be used profitably on high voltage systems?
Why can't a tumbler switch with an ordinary fuse be used profitably on high voltage systems?
- It cannot interrupt large fault current successfully (correct)
- It is not cost-effective
- It has a time delay in blowing the fuse
- It requires frequent replacement of the fuse
What problem arises when a fuse blows on high voltage systems?
What problem arises when a fuse blows on high voltage systems?
- The risk of serious damage to costly equipment (correct)
- The cost of replacing the fuse
- The interruption of power supply to customers
- The inability to control domestic appliances
Why are automatic protective devices or switchgears required for high voltage systems?
Why are automatic protective devices or switchgears required for high voltage systems?
What is the key disadvantage of using a tumbler switch with an ordinary fuse on high voltage systems?
What is the key disadvantage of using a tumbler switch with an ordinary fuse on high voltage systems?
What is the primary function of a circuit breaker in an automatic protective equipment system?
What is the primary function of a circuit breaker in an automatic protective equipment system?
Why might a circuit breaker be preferable to a fuse in certain instances?
Why might a circuit breaker be preferable to a fuse in certain instances?
What happens when heavy current flows through the primary of the current transformer (CT)?
What happens when heavy current flows through the primary of the current transformer (CT)?
How is an arc extinguished in a circuit breaker during opening?
How is an arc extinguished in a circuit breaker during opening?
What is the role of the relay in an automatic protective equipment system?
What is the role of the relay in an automatic protective equipment system?
