What term refers to the integral of Active Power over time, measured in Watthour?

The term that refers to the integral of Active Power over time, measured in Watthour, is Active Energy. This concept is fundamental in electrical engineering as it quantifies the actual energy consumed or produced by electrical devices over a specific period. Active Power, measured in Watts, indicates the rate at which energy is used at a particular moment, whereas Active Energy accumulates this power usage over time, thus providing a total energy measurement in Watthours.

Active Energy is crucial for billing purposes and energy management, allowing utilities to charge customers based on their actual consumption rather than just their instantaneous power usage. This distinction is important to acknowledge because it impacts how we design and operate electrical systems, ensuring they are efficient and meet the demands of users over time. In contrast, terms like Apparent Power and Reactive Power relate to the efficiency of power systems and do not encapsulate the concept of energy over time.