What is the role of a grounding transformer?

The correct choice is related to the grounding transformer’s primary function, which is to provide a grounding method for ungrounded systems. Grounding transformers are specifically used in electrical systems to create a neutral point, which allows for the safe grounding of the system. This is particularly important in systems that do not have a solidly grounded neutral, as it helps to stabilize the voltage during fault conditions, mitigate overvoltages, and ensure that protective devices can operate effectively.

By creating a low-impedance path to ground, the grounding transformer enhances the safety and reliability of the electrical system by allowing for the detection of faults, which leads to quicker isolation of any issues. This also helps to protect equipment and personnel by reducing the risk of electric shock and equipment damage.

The other options do not accurately describe the primary role of a grounding transformer. Lowering voltage for residential use pertains to transformers focused on voltage stepping, power surge protection is typically associated with surge suppressors or other protective devices, and enhancing satellite communications does not relate to the function of grounding transformers at all.