Dold Industries Ltd

11 Hamberts Rd. Blackall Ind. Estate
South Woodham Ferrers
GB-Essex, CM3 5UW
UG 9400

Multifunction measuring relay, for Modbus

UG 9400


Auxiliary voltage

Terminal type

Measuring voltage

Measuring current


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The multifunctional measuring relay UG 9400 of the VARIMETER PRO series allows easy parameter... more

Product description

The multifunctional measuring relay UG 9400 of the VARIMETER PRO series allows easy parameter setting, monitoring and diagnosis via a Modbus RTU interface. The measuring relay simultaneously monitors up to 9 different measured variables such as voltage, voltage asymmetry, current, cos phi, active, apparent and reactive power as well as frequency and phase sequence. The measurement in three-phase and single-phase networks is very easy and without much wiring effort.

Technical specifications

Width: 22,5 mm
1- / 3-phase: 1, 3
Standard measuring range: 3 AC 24 - 690 V
Measuring range max.: 690 V
Auxiliary voltage: AC, AC/DC
Operate delay: Yes
Bus interface: Modbus RTU
Enclosure design: Switch cabinet
Type: UG 9400


  • Simple parameterization, monitoring and diagnosis
  • Compact design
  • Simultaneous monitoring of up to 9 measured variables
  • Large measuring range 3 AC 24 ... 690 V
  • Min-, Max-value or window monitoring
  • Auxiliary voltage ranges AC/DC 24 ... 240 V or AC 60 ... 400 V
  • Early detection of irregularities
  • Increases plant availability and productivity
  • Differentiated error messages
  • Space and cost saving
  • Reduced wiring
  • Lower investment, operating and maintenance costs


  • Multifunctional measuring relay acc. to IEC/EN 60255-1
  • With galvanic separated Modbus RTU interface
  • Voltage monitoring (1- or 3-phase)
  • Current monitoring
  • Frequency monitoring
  • Power factor cos phi
  • Phase sequence, phase failure, asymmetry
  • Active, reactive and apparent power
  • Start up time delay, response delay
  • Adjustable hysteresis 0.2 ... 50 % of the response value
  • Error memory
  • 2 changeover contacts
  • Relay function energized / de- energized on trip parameterizable
  • Width 22.5 mm