Which banks connect together buses of different voltages such as 138 kV and 230 kV?

Which banks connect together buses of different voltages such as 138 kV and 230 kV?

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

Answer: (A)

Connecting buses at different voltages requires a setup that bridges the voltage gap and allows controlled power transfer between systems. An intertie bank is a group of transformers and switching gear arranged specifically to tie together two buses at different voltage levels, such as 138 kV and 230 kV. This arrangement enables inter-system energy flow and voltage regulation while keeping each side protected and isolated when needed. Line banks, in contrast, are collections of breakers for a transmission line segment operating at the same voltage, not intended to cross voltage levels. Distribution banks handle connections at distribution voltages to feeders, and subtransmission banks link buses within the subtransmission level without bridging widely different voltages. So the intertie bank is the one designed to connect different voltage buses.

Connecting buses at different voltages requires a setup that bridges the voltage gap and allows controlled power transfer between systems. An intertie bank is a group of transformers and switching gear arranged specifically to tie together two buses at different voltage levels, such as 138 kV and 230 kV. This arrangement enables inter-system energy flow and voltage regulation while keeping each side protected and isolated when needed.

Line banks, in contrast, are collections of breakers for a transmission line segment operating at the same voltage, not intended to cross voltage levels. Distribution banks handle connections at distribution voltages to feeders, and subtransmission banks link buses within the subtransmission level without bridging widely different voltages. So the intertie bank is the one designed to connect different voltage buses.