AC Substation Protection and Automation Quiz…

Differential Relay — Differential relays compare currents entering and leaving the transformer to detect internal faults.

To interrupt fault currents — Circuit breakers quickly interrupt the flow of current during fault conditions to protect equipment.

A communication network — SCADA systems rely on communication networks for remote monitoring and control.

Phase-to-ground faults — Overcurrent relays detect excessive current flow, which often indicates a fault, including phase-to-ground faults.

Distance Relay — Distance relays measure impedance (V/I) to determine the distance to a fault.

Question 1 of 5

Which protection device is primarily used to protect transformers from internal faults?

Differential relays compare currents entering and leaving the transformer to detect internal faults.

Question 2 of 5

Circuit breakers quickly interrupt the flow of current during fault conditions to protect equipment.

Question 3 of 5

SCADA systems rely on communication networks for remote monitoring and control.

Question 4 of 5

Overcurrent relays detect excessive current flow, which often indicates a fault, including phase-to-ground faults.

Question 5 of 5

Distance relays measure impedance (V/I) to determine the distance to a fault.