MODULAR DIGITAL METERING INSTRUMENTS
   
The modular digital metering instruments DMK7… and DMK8… warrant a extreme stability of the readouts owing to the large number of samplings.
The measures in TRMS provide for a correct operation even in presence of voltage and current conditions with high harmonic content.
The metering instruments find use in single or three-phase power distribution boards for both industrial and service fields.
All the models are able to store and display maximum (HIGH) and minimum (LOW) values of the readouts.
There are DMK…R1 types available with the same features along with one programmable relay output.
Units equipped with a voltage measure input, consent to program the VT (Voltage Transformer) ratio and therefore can be employed in medium-voltage systems.
They can be used as an effective solution to replace traditional analog instruments, that is voltmeter and ammeter complete with relative changeover switches, with the advantage of extra panel space.
  

Operating characteristics 

  • Power supply:  220…240VAC -15% +10%
  • Supply frequency:  50…60Hz ±10%
  • Voltage measure accuracy: + 0.25% full scale + 1 digit
  • Current measure accuracy: + 0.5% full scale + 1 digit
  • True RMS value
  • Voltage measure range: 35…660VAC
  • Current measure range: 0.05…5.75A 
  • LED display: 3 or 4 segments depending on the model
  • 3-module housing (DIN43880).

Specific features of the DMK...R1 models

  • Programmable relay output

  • LED indication for protection tripping

  • Programmable tripping thresholds 

  • Programmable tripping delay time available for each threshold

  • Programmable function consenting to have faster tripping time proportionally to measure shifting respect with the programmed limit

  • Trip resetting, selectable manual or automatic

  • Automatic resetting with programmable delay

  • Memory function with option to storing the relay state at power loss and then reset it at power return

  • Option to select relay state during regular operation, positive fail-safe operation.
      
 Order code  Description

Metering instruments for three-phase systems

DMK 70

Three-phase voltmeter

DMK 71

Three-phase ammeter

DMK 75

Combined three-phase voltmeter, ammeter and watt meter

Metering instruments for single-phase systems

DMK 80

Single-phase voltmeter

DMK 81

Single-phase ammeter

DMK 82

Single-phase voltmeter or ammeter

DMK 83

Frequency meter

DMK 84

Cosphi meter.

Metering and protection instruments for three-phase systems with programmable relay output

DMK 70 R1

Three-phase voltmeter

DMK 71 R1

Three-phase ammeter

DMK 75 R1

Combined three-phase voltmeter, ammeter and watt meter

Metering instruments for single-phase systems with programmable relay output

DMK 80 R1

Single-phase voltmeter

DMK 81 R1

Single-phase ammeter

DMK 83 R1

Frequency meter

DMK 84 R1

Cosphi meter

    

          
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