What is one of the main reasons a delta connection is used?

A delta connection is primarily used in electrical systems to balance load across multiple phases. This configuration connects three coils or windings in a triangular manner, which helps distribute electricity evenly among the phases. As a result, it can support higher loads and offer better performance for three-phase systems.

By achieving balance among the phases, the delta connection minimizes the risk of overloading a single phase and enhances the stability and efficiency of the power system. This balance is crucial, particularly in industrial applications where machinery may require significant amounts of power.

In contrast, other options like simplifying installations, reducing voltage levels, or providing redundancy do not capture the core purpose of using a delta connection. While delta connections can have benefits that relate tangentially to these aspects, the primary and most direct reason for their use remains efficient load balancing across phases.