What does the master load switch connect to in the load bank?

The master load switch is a critical component in a load bank system, primarily because it facilitates the connection of the generator's power to the current breakers that manage the kilowatt (KW) step switches. This connection is essential for the load bank to function properly; it allows the load bank to apply load in specified increments, thus enabling efficient testing and validation of the generator’s performance under various load conditions.

The interaction between the master load switch and the current breakers ensures that power distribution is managed effectively during testing, allowing for precise control over how much load is applied to the generator. This process is vital in assessing the generator's capacity, fuel efficiency, and overall performance.

While the other options present components typically found in an electrical system, they do not directly relate to the primary function of the master load switch. The cooling system, control circuits, and alarm system serve important roles but are not directly involved in the master load switch's critical function of connecting power to the current breakers for the KW step switches.