Abb`s motor protection relays come in various models. Being a part of that spam 150 c is used to protect a.C. Motors, small generators, protection against thermal overload, earth-fault, over current, over voltage and phase unbalance. 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 trip contact and the other with a breaking trip contact. The relay can also be used for protection of other objects, such as transformers and feeders, requiring a single-, two- or three-phase over-current and/or overload protection and non-directional earth-fault protection.
