AEP AEP Substation Operations

Question 1

What is the primary function of a substation in the electrical distribution system?

Accepted Answer

To transform voltage levels and distribute power to consumers

Answer

Substations transform voltage levels (step-up or step-down) and distribute electrical power from transmission lines to distribution networks.

Question 2

What does a disconnect switch in a substation do when opened?

Accepted Answer

Isolates a section of equipment from energized conductors

Answer

Disconnect switches provide visible isolation of substation equipment for maintenance, ensuring workers are protected from energized conductors.

Question 3

What is the purpose of a surge arrester installed at a substation?

Accepted Answer

To protect equipment from overvoltage transients and lightning

Answer

Surge arresters protect substation equipment by diverting overvoltage surges from lightning or switching transients to ground.

Question 4

What is the function of a bus in substation design?

Accepted Answer

To serve as a common connection point for multiple circuits

Answer

A substation bus is a conductor that serves as a common connection point where multiple circuits, transformers, and feeders can be interconnected.

Question 5

Which type of substation equipment automatically interrupts fault current to protect the system?

Accepted Answer

Circuit breaker

Answer

Circuit breakers automatically interrupt fault currents and can be reclosed remotely, protecting substation equipment and the distribution system.

(AEP) American Electric Power Practice Test