Application

The numerical motor protection relay SPAM 150 C is an integrated design current measuring multifunction relay for the complete protection of a.c. motors. The main area of application covers large or medium-sized three-phase motors in all types of conventional contactor or circuit-breaker controlled motor drives. The motor protection relay is available in two versions, one with a making trip contact and the other with a breaking trip contact.

The relay can also be used for the protection of other objects, such as transformers and feeders, requiring a single, two or three-phase overcurrent and/or overload protection and non-directional earth-fault protection.