Which of these is an example of an ignition protected device?

An ignition protected device is specifically designed to prevent ignitable sources in hazardous areas, particularly in marine environments where flammable gases or vapors may be present. Blower motors, particularly those engineered for use in such environments, are made to minimize the risk of sparking or overheating that could ignite flammable materials. These components often feature special construction techniques and materials that help contain any potential ignition sources, ensuring safety in enclosed or hazardous conditions.

In contrast, other options such as inverters, batteries, and circuit breakers may not have the same stringent design features to mitigate ignition risks. While they all serve important roles in electrical systems, they are not necessarily designed specifically for ignition protection in the way that blower motors can be. Therefore, the choice of blower motors as an ignition protected device is based on their specific engineering to ensure safety in potentially dangerous environments.