SIRIUS 3RR21 and 3RR22 current monitoring relays are suitable for the load monitoring of motors or other loads. In 2 or 3 phases they monitor the rms value of AC currents for overshooting or undershooting of set threshold values
Monitoring relay attachable to contactor 3RT2 For contactor size S00 or S0 Analogue or digital adjustable For alarm and warning monitoring for current overshoot/undershoot phase failure, wire break phase sequence fault current blocking current warning and alarm Screw connection/Spring Clamp SPCO output contact
The Siemens monitoring relay can be mounted onto 3RT2 contactor.
