Define the term “input power” in a power transmission system.

The term "input power" in a power transmission system refers specifically to the total power supplied to the system for processing and transmission. This encompasses all the energy transferred into the system from various sources, whether it be electrical, mechanical, or hydraulic. It serves as the starting point for understanding how energy moves through and is transformed in the system.

Input power is critical in assessing the efficiency and performance of a power transmission system since it sets the baseline for what is available for the system's operations. The power that is ultimately processed and utilized, or the power available at the output, is typically less than the input power due to various losses that occur during transmission, such as those from friction, heat, and other inefficiencies. Therefore, input power is foundational for calculating system performance metrics, including power losses and efficiency ratios.