Monitoring Relays for single-phase current, power factor and active current monitoring

The 3UG4 relays for current, active power and active current monitoring are ideally suited for monitoring the load of motors and the functionality of electric loads. These devices detect signs of wear and faults early on, thereby for example facilitating the timely implementation of maintenance measures to prevent system failures. Also available with IO-Link connection.

Advantages at a glance:

  • Reduced stock-keeping thanks to wide-voltage versions

  • Variably adjustable to exceedance, shortfall or window monitoring

  • Freely parameterizable delay times and reset behavior

  • Permanent display of actual value and fault type

  • Setting of monitoring limits on the basis of real measured values

  • Real effective value measurement

Current monitoring

  • Only two versions from 2 mA to 10 A

  • Applicable for frequencies with 40–500 Hz AC and DC

Power factor and active current monitoring

  • Global applicability thanks to wide voltage from 90 to 690 V AC

  • Monitoring of smaller single-phase motors with a no-load current below 0.5 A

  • One device for motor monitoring, from no-load to overload

  • Voltage-independent monitoring of the motor load