Siemens 3RR2243-3FA30 New In Box3RR2243 3FA30 Siemens Description: Monitoring relay, can be mounted to Contactor 3RT2, Size S2 standard, digitally adjustable Apparant active current monitoring 8 80 A, 20 400 Hz, 3 phase Supply 24 V AC DC 1 change over contact, 1 semiconductor output for alarm and warning Monitoring for Current overshoot and undershoot Phase failure, Cable break Phase sequence Residual current Blocking current Warning and alarm thresholds with or without fault buffer