Reactors like capacitors, are basic to and an integral part of both distribution and transmission power systems. Depending on their functions, reactors are either connected in shunt or in series with the network; singularly or in conjunction with other basic components such as power capacitors. Reactors can be either dry type or oil immersed. Dry type reactors may be of air core or iron core construction. Dry type air core reactors feature fully encapsulated windings with the turns insulation provided by film, fiber, or enamel dielectric. These reactors are employed over the full range of distribution and transmission voltages, including EHV and HVDC. Dry type air core reactors are mainly used for current limiting applications due to their inherent of inductance vs. current.