Reactive power
What is Reactive Power?
Reactive power occurs in AC networks when electrical energy is stored in magnetic or electric fields and later returned to the source.
This effect appears primarily in motors, transformers and capacitive loads, causing higher current flow and fluctuating voltage levels without increasing the available active power. As a result, cables and switching devices experience additional load, even though no usable work is delivered.
In practice, reactive power is reduced through compensation solutions such as capacitor banks, compensation systems or active Power-Factor-Correction (active PFC).
These measures lower network losses, stabilize voltage and relieve transformers—an essential advantage for industrial power distribution and precise test environments.
At the same time, reactive power remains necessary in many applications, as inductive loads require reactive energy to build magnetic fields.
Effective reactive power management ensures a balanced ratio between required reactive power and minimal network load, maintaining long-term power quality and system efficiency.