AEP Substation Operations Flashcards
6 cards from real AEP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 AEP Substation Operations flashcards as text
What is the primary function of a substation in the electrical distribution system?
Answer: To transform voltage levels and distribute power to consumers
Substations transform voltage levels (step-up or step-down) and distribute electrical power from transmission lines to distribution networks.
What does a disconnect switch in a substation do when opened?
Answer: Isolates a section of equipment from energized conductors
Disconnect switches provide visible isolation of substation equipment for maintenance, ensuring workers are protected from energized conductors.
What is the purpose of a surge arrester installed at a substation?
Answer: To protect equipment from overvoltage transients and lightning
Surge arresters protect substation equipment by diverting overvoltage surges from lightning or switching transients to ground.
What is the function of a bus in substation design?
Answer: To serve as a common connection point for multiple circuits
A substation bus is a conductor that serves as a common connection point where multiple circuits, transformers, and feeders can be interconnected.
Which type of substation equipment automatically interrupts fault current to protect the system?
Answer: Circuit breaker
Circuit breakers automatically interrupt fault currents and can be reclosed remotely, protecting substation equipment and the distribution system.
What is the purpose of a ground grid installed beneath a substation?
Answer: To provide a safe equipotential surface and dissipate fault currents
The ground grid equalizes potential across the substation yard, reducing step and touch voltages to safe levels during fault conditions.