Monitoring relay attachable to contactor 3rt2. size s0 standard, digital adjustable apparent/active current monit. 4 - 40a, 20-400 HZ, 3-phase supply 24 V AC/DC 1 co contact, 1 semicond. for alarm and warning monitoring for current overshoot/undershoot phase failure, wire break phase sequence fault current blocking current warning and alarm thresholds with or w/o error log on-delay 0-99 s spurious peak suppr.0-30 s break after fault 0-300 min screw connection