Which banks are dedicated to individual lines?

Which banks are dedicated to individual lines?

• A. Line banks
• B. Intertie banks
• C. Subtransmission banks
• D. Distribution banks

Answer: (A)

Line banks are groups of circuit breakers and disconnects built to protect and switch a single transmission or distribution line. Having a dedicated bank for each line means a fault or maintenance action on one line won’t force other lines to be opened or de-energized; you can isolate the affected line quickly while keeping the rest in service. This arrangement also makes protection coordination simpler because the protection for that line references its own bank separate from others. Intertie banks connect two regions or systems rather than serving one specific line; subtransmission banks handle lines at the subtransmission level; distribution banks service the distribution feeders. So the line bank concept directly corresponds to lines being dedicated to their own bank.

Line banks are groups of circuit breakers and disconnects built to protect and switch a single transmission or distribution line. Having a dedicated bank for each line means a fault or maintenance action on one line won’t force other lines to be opened or de-energized; you can isolate the affected line quickly while keeping the rest in service. This arrangement also makes protection coordination simpler because the protection for that line references its own bank separate from others. Intertie banks connect two regions or systems rather than serving one specific line; subtransmission banks handle lines at the subtransmission level; distribution banks service the distribution feeders. So the line bank concept directly corresponds to lines being dedicated to their own bank.