If the transformer bank's secondary windings are connected in series, what configuration is used?

When the secondary windings of a transformer bank are connected in series, the configuration is indeed referred to as a series connection. In this arrangement, the outputs of each secondary winding are connected end to end, which results in a cumulative voltage that is the sum of the individual voltages from each transformer winding. This allows the system to effectively increase the output voltage while maintaining the same current level, provided the windings are designed for the same load.

In a series configuration, it is important to ensure that all secondary windings share the same current and that their voltages add together correctly, which facilitates higher voltage levels for transmission purposes or specific load requirements. This type of connection is particularly useful when powering high-voltage applications, ensuring that the total output meets the operational specifications needed without the complications associated with balancing multiple power sources.

Other configurations, such as parallel connections, would involve joining the windings at common terminals to share the load current while maintaining the same voltage. This is not applicable if the secondary windings are specified as being in series, which is focused on voltage summation rather than current distribution.