Protection Relays for Demanding Applications 13 types of digital current or voltage protection for demanding distribution systems, each one dedicated to a single application. Models available: Sepam S40, S41, S42, S50, S51, S52, S53, S54, T40, T42, T50, T52, M41, G40. Ready to use Sepam series 40 includes : One base unit, one 20 pin connector, one 6 pin connector, one current connector, one application, one operating language, one TCP/IP firmware option, optional modules, communication interface or core balance CT.