What is the role of isolation transformers in systems allowing shore power sources to operate in parallel?

Isolation transformers play a crucial role in systems that permit shore power sources to operate in parallel by providing electrical isolation between different power sources. This isolation is essential for safety and performance reasons. When two or more power sources are connected to the same electrical system, such as shore power and onboard generators, there is a need for a barrier to prevent unintended current flow between these sources.

By ensuring that there is no direct electrical connection, isolation transformers help to protect the equipment and personnel from potential electrical faults, reduce the risk of shock, and maintain system integrity. This isolation is particularly important in marine environments where power systems can face unique stresses and challenges.

While isolation transformers might also contribute to reducing noise in the system, their primary and most significant role in this context is to provide isolation. Other options like increasing power output or decreasing frequency do not directly pertain to the primary function of an isolation transformer in this scenario.