Technical details

Item no.: 1401625
All downloads
Janitza UMG 20CM Front

Data at a glance

Supply voltage AC

90 … 276 V AC

Supply voltage DC

90 … 276 V DC

Harmonics V / A

1st – 63rd

Active energy class

1

Digital / Pulse output

2

Memory size

768 KB

Interfaces

  • RS485

Protocols

  • Modbus RTU

Functions and features

Your benefits - The intelligent system solution

  • Early warning with system failures
  • Avoidance of costly and hazardous system downtimes; the availability of systems is increased
  • Localisation of individual faulty feeders, reduced work when troubleshooting
  • Early detection of an overloading of the N conductor and critical residual currents, resulting in increased fire safety
  • Through parameterisation of the system in new condition and constant monitoring, all changes to the system state after the point of commissioning can be detected
  • Fulfilment of the safety criteria "RCM residual current monitoring" in data centres
  • Convenient monitoring and parameterisation solution with GridVis® software
  • Operating current acquisition of all relevant consumers as a basis for an energy management system (EnMS)

Sensors for energy management

  • Energy data of a large number of loads can be acquired and passed to a database with ease
  • Automatic reading out and saving of the measured values and data saved in the measurement devices as well as the exceedance of parameterised threshold values
  • Channel-specific measured values of the current monitoring devices can be displayed via the GridVis® software
  • The evaluation and saving of data in central databases is implemented via the GridVis® software
  • The greater the scope of information, the more accurate the determination of savings potentials
  • Energy optimisation offers a higher, more economical savings potential (ISO 50001)

Alarms before failures (preventative residual current analysis)

  • Faults arising will be detected in good time
  • Monitoring, evaluation and reporting of creeping increases in residual currents (e.g. triggered by insulation faults and operating currents for system parts or loads being too high)
  • Reduction of downtimes

Power supply without drop-outs

  • Permanent monitoring and logging of processes in TN-S or TN-C-S systems
  • Simple parameterisation and operation of the RCM measurement
  • Automatic reporting in the event of problems enables a rapid initiation of countermeasures
  • Comprehensive diagnostics increase safety and efficiency of a company

The system for smart people

  • Compact nature of the system
  • Can be retrofitted to existing systems
  • Modbus RTU directly on board
  • State indication per channel (LEDs)
  • Name stored per channel in the measurement device
  • Wide range power adapter (90 – 276 V ... AC / DC)
  • Integration in the GridVis® software
  • Diverse current transformer variants for the individual application
  • Measurement variants:
    • Three-phase and single-phase energy measurement
    • RCM measurement three-phase and single-phase
  • High sampling rate 20,000 Hz
  • Current transformer connection monitoring (i.e. wire break will be detected)
  • Harmonics analysis up to 63rd harmonic via analysis channel
  • Saving of minimum and maximum values with time stamp
  • Standard measured values: V, A, kW, kVA, kVar, kWh (variable list)
  • Scalability of the system

RCM and energy measurement device in a single unit

  • 20 current measurement channels +/- 0.5 %
  • 4 voltage measurement channels +/- 0.5 %
  • Internal RS485 interface (Modbus as Slave)
  • 20 LEDs – One LED for each current channel (Green = o.k., Yellow = Warning; Red = Nominal current exceed)
  • Measurement range of operation current with burden up to 63 A with closed or split core current transformers (standard measured values: V, A, kW, kVA, kVar, kWh)