Which device, if it uses a transformer for galvanic isolation, must meet specific requirements?

The correct answer focuses on voltage regulators that utilize transformers for galvanic isolation. Voltage regulators are designed to maintain a constant output voltage despite variations in load current or input voltage. When incorporating a transformer for galvanic isolation, it is essential for the voltage regulator to meet specific safety and performance standards. These regulations ensure that the device effectively isolates the load circuit from the power source, preventing any fault conditions on one side from affecting the other.

This requirement is critical in marine applications where electrical safety is paramount given the potential for water to conduct electricity. Isolators, load balancers, and transformers themselves do not necessarily have the same stringent requirements regarding galvanic isolation in the same context. While they are important devices in electrical systems, the focus on voltage regulators specifically highlights the safety and performance concerns associated with maintaining electrical independence between the input and output through isolation.