What is “inductive reactance”?

Inductive reactance refers to the opposition that an inductor provides against the flow of alternating current (AC). When AC passes through an inductor, it creates a magnetic field that opposes changes in the current. This opposition is not the same as resistance, which pertains to the flow of direct current (DC); instead, inductive reactance is specific to AC and is caused by the inductive properties of coils or inductors used in electrical circuits.

Inductive reactance is frequency-dependent, meaning that the higher the frequency of the AC signal, the greater the inductive reactance. This characteristic is crucial in applications such as transformers, motors, and other electrical components where controlling current behavior is essential. Understanding inductive reactance is vital for HVAC technicians, particularly when working with systems that utilize AC motors and other inductive devices.