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What does ta mean in relay protection

The TA relay uses a **bi-metal thermal mechanism** that accurately replicates the heating behavior of a motor. Relion protection and control relays for several application reduce complexity. Long term cost reduction (TCO) for trainings and maintenance by reduce variety of relays A fast and selective arc fault mitigation for air-insulated LV & MV switchgear and Relion protection and control relays and sensor. The protection and control devices in electrical equipment can be referred to by numbers, with appropriate suffix letters when necessary, according to the functions they perform. Thermal overload relays and electronic overload relays are mainly used in connection with AX series contactors to. current flows through their bimetals (1 per phase) which are indirectly heated. Under the effect of the heating, the bimetals ben, cause the relay to trip and the position of relays have two built in auxiliary contacts: NC marked 95-96; NO marked 97-98. Both contacts are physically separate and. The ABB **TA Series** is specifically designed for use with ABB's **A Series contactors (A9–A110)**. Built in accordance with **IEC 60947-4-1** international standards, the TA series.