Key Players Covered Some of the major companies that are present in the faulted circuit indicator market are Eaton, Schweitzer Engineering Laboratories (SEL), Dipl.-Ing. H. Horstmann GmbH, Thomas Betts Corporation, ABB, Elektro-Mechanik GmbH, Schneider Electric, Streamer Inc., Siemens Energy, Edison Controls F.C.I., Inc., GE Grid Solutions, Power Delivery Products, SC Electric Company, and Sun Electric.