Which type of banks connect buses of different voltages?

Bus banks are essential in electrical systems as they serve the important function of connecting buses of different voltage levels. By doing so, bus banks facilitate the transfer of power between various sections of the electrical grid, ensuring that energy can flow effectively from one voltage level to another. This is crucial for managing load distribution and maintaining system reliability across the network.

Bus banks allow for different voltage buses to interconnect without compromising safety or operational integrity. They can accommodate changes in load demand and ensure that voltage levels are appropriately managed across the system. This connection capability is particularly valuable in scenarios where multiple generation sources with varying voltage outputs need to be integrated into a cohesive operational framework.

The other options, while related to power systems, do not specifically pertain to the role of connecting buses of different voltages. Sourcing banks, power banks, and line banks have distinct purposes within the electrical infrastructure, but it is the bus bank that directly addresses the interconnection of buses across varying voltage levels.