The tap changer voltage charts provide the voltage _________ for the different tap positions.

The correct response is that the tap changer voltage charts provide the voltage levels for the different tap positions. This terminology is relevant because "voltage levels" accurately reflects the specific voltages that can be obtained at each tap setting on the transformer. Tap changers are utilized to adjust the transformer’s output voltage to maintain system stability and ensure that voltage remains within prescribed limits.

Understanding the context of tap changing mechanisms is crucial; they essentially allow for fine-tuning of voltage output based on varying load conditions. The charts serve as a guide to the operator, indicating the precise level of voltage that corresponds to each tap position, which is essential for proper system operation and maintenance.

The other terms, while related, do not capture the concept as succinctly. "Settings," for instance, may imply a more generic configuration than the specific voltage outputs that "levels" designates. Similarly, "values" could encompass a broader range of information, while "ranges" lacks the precision of indicating exact voltage outputs tied to each tap position. Therefore, "levels" is the term that best encapsulates the information represented in tap changer voltage charts.