In the past, isolation transformers (1 to 1 ratio) were used to control power transients, provide line protection and isolate loads. Line Reactors accomplish these functions, and more, at a lower cost and a smaller physical size. They are excellent at providing isolation of the drive from the power system. This is important because many times multiple drives are located near each other and cause interference between each other. Line Reactors are used to reduce voltage notching caused by the rapid change in current draw by ASDs. They also provide short-circuit protection and reduce spikes, sags and harmonics. Harmonics are currents flowing at frequencies which are multiples of the fundamental frequency (usually 60 Hz). All our Line Reactors are "Harmonic-Compensated" units. This allows them to be used in any application.