Which pot is generally located in the middle of three in a closed bank?

The correct answer pertains to the concept of transformer banks, commonly used in power distribution systems. In a closed bank configuration, especially when dealing with three-phase systems, the distribution is designed considering both balance and efficiency.

Choosing the lighter pot as the correct answer aligns with the principle that in a closed bank system, the pot that is 'lighter' or has the least current is generally placed in the center to balance the load across all phases. This arrangement helps to stabilize the system by minimizing the potential for harmonics and keeping the voltage levels balanced among the three transformers.

The heavier pot typically would not be centrally located because placing it on the sides can help distribute its load effectively across the overall system, allowing for greater efficiency and reducing the strain on the central unit. Furthermore, a pot with the highest load or lowest impedance would not be positioned in the middle, as this could lead to inefficiencies and imbalance in the electrical system.

By placing the lighter pot in the center, the design promotes uniformity of load and enhances the operational stability of the entire transformer bank.