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Product information

Basic device

PMD multi-measurement Function

DIRIS A-20 are power measurement and monitoring devices that provide the user with all the necessary measurements to successfully complete energy efficiency projects and ensure safe monitoring of the electrical distribution. All this information can be used and analysed remotely with the help of energy efficiency software.


Advantages

User-friendly operation
With its large, backlit multi-display with 4 special keys, the DIRIS A-20 is easy to operate.

Compliance with IEC 61557-12 standard
The IEC 61557-12 standard is regarded as the reference for PMDs (Performance Metering + Monitoring Devices). Compliance with it guarantees the performance of the PMDs under the ambient conditions typical for industrial and tertiary applications.
Detection of wiring errors
DIRIS A-20 is equipped with a troubleshooting function for the SW connection.

Individual configuration
Additional communication and input/output modules can extend the basic functions of this product. Equipped with additional modules, DIRIS A-20 offers the user flexibility and expandability over the entire service life of the product.

Multi-measurement
  • Currents
    - Instantaneous: I1, I2, I3, In
    - Max. mean value: I1, I2, I3, In
  • Voltages & frequency
    - Instantaneous: V1, V2, V3, U12, U23, U31, F
  • Power
    - Instantaneous: 3P, ΣP, 3Q, ΣQ, 3S, ΣS
    - Max. mean value: ΣP, ΣQ, ΣS
  • Power factors
    - Instantaneous: 3PF, ΣPF
Metering
  • Active energy: +/- kWh
  • Reactive energy: +/- kvarh
  • Operating hours:

Harmonic analysis

  • Distortion factor (rank 51)
    - Currents: thd I1, thd I2, thd I3
    - Phase voltages: thd V1, thd V2, thd V3
    - Line voltages: thd U12, thd U23, thd U31
Events
  • Alarms on all electrical parameters

Communication (1)

  • RS485 with Modbus protocol

Output power

  • Equipment control
  • Alarm reporting
  • Pulse transmission
Current measurement (TRMS)
Via CT, primary side 9.999 A
Via CT, primary side 5 A
Measuring range 0 … 11 kA
Input consumption 0.6 VA
Measured value update frequency 1 s
Properties
Dimension (BxHxT mm): 96 x 96 x 60
Display: LCD
Type-Name: DIRIS
Type number: A-20
frequency range: 45 - 65 Hz
protection rating: Front side IP 52, Housing IP 30
sampling frequency: 65 Hz
Weight: 0.4 kg