On watt hours meters what do Kt Kh and Ka stand for and how are they used in calculations?

In watt-hour meters, Kt, Kh, and Ka represent different constants used for calculating energy consumption. Kt (time constant) accounts for the time duration of measurement, Kh (hour constant) relates to the rate of energy consumption per hour, and Ka (apparent constant) is used for adjusting the meter's readings based on the specific characteristics of the load. These constants help in converting the raw meter readings into accurate energy usage figures, ensuring proper billing and energy management.