Dry type air core reactors have traditionally been used for current limiting applications due to their inherent linearity of inductance vs. current. For this application, impregnated construction usually become the design of choice because its improves mechanical characteristics enabled the reactors to withstand higher fault currents.
Dry type air core reactors are employed over the full range of distribution and transmission voltages, including EHV (high voltage series reactors) and (filter reactors, smoothing reactors) HVDC. This method of construction is extremely robust.
Dry type iron core reactors can also be used at low voltage and indoors for applications such as harmonic filtering and power conditioning (di/dt, smoothing etc.).
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