How is KWH consumption calculated using current and potential transformer ratings?

To calculate kilowatt-hour (KWH) consumption using current and potential transformer ratings, it's essential to understand how the readings from these transformers translate into energy usage.

The correct choice involves multiplying the dial reading by a specific factor, which varies based on the transformer configurations and the units they measure. In this case, multiplying the dial reading by 360 is appropriate because it accounts for the way energy is measured and reported.

This factor of 360 is derived from the relationship between the readings of the potential transformer (which typically measures voltage) and the current transformer (which measures current). Specifically, it is related to the number of hours in a specific period (for example, over one hour) and the need to convert the reading into a standardized unit of energy consumption (KWH).

Current transformer and potential transformer ratings provide the required scaling factors to ensure that the readings accurately reflect the power consumed. The multiplication by 360 helps to adjust those readings according to the rating specifics, leading to the correct KWH calculation that reflects actual energy use in an electrical system.

In contrast, other options either misapply mechanical principles or suggest incorrect mathematical operations that wouldn't yield accurate energy measurements. Therefore, understanding the significance of the factor 360 and its relation to the readings from