Industrias IEM is proud to make available our new air core oil-immersed shell type power reactors for the national electrical system.   Externally, shell type reactors look like a transformer, however, reactors have an internal air core instead of a magnetic iron core, and a single winding, instead of 2 or 3 windings in other transformers.       Shut reactors are relatively simple devices, basically built in two different configurations.   § Shell type Power Reactors § Leg type Power Reactors