Does a galvanic isolator allow AC current to pass through?

A galvanic isolator is designed to prevent galvanic corrosion by breaking the direct electrical connection between a vessel's AC grounding system and the shore power system. However, it does allow AC current to pass through, but only under certain conditions related to the design and functionality of the device.

The primary function of a galvanic isolator is to block any DC voltage, which is responsible for galvanic corrosion due to dissimilar metals in contact with seawater. By allowing AC current to pass through while blocking unwanted DC flow, a galvanic isolator protects against corrosion while still enabling the operation of AC electrical systems onboard a vessel.

It is crucial to recognize that while galvanic isolators do allow AC current to flow, they are fundamentally designed with the priority of enhancing safety and longevity of the metal components in the marine environment. Thus, the assertion that a galvanic isolator allows AC current to pass through is indeed correct, as it ensures operational continuity for AC systems while effectively addressing corrosion risks.