Carry out all measurement tasks with a single device.


The PQI-D power quality interface for low, medium and high-voltage networks is the central component of a system allowing all measurement tasks in electrical networks to be carried out. Our 19″ device is impressively flexible and can be both wall-mounted and installed in a control panel.

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Instruction Manual
Technical Data Sheets
PQ Para Express


I-Sense: Current Feeder Measurement
Mounting Panel
Rogowski Coil
Current clamp
Divisible differential current transformer
GPS Receiver set

Record fault events quickly and easily

The power quality interface PQI-D records fault events at 96 μs sampling values and at a length (preceding and subsequent history of the event) that can be freely selected. Fault events are also recorded composed of the effective values of half period values (10 ms).


Available for wall assembly, control panel installation and as a 19″ plug-in unit

The PQI-D can come in various different sizes. It can be supplied as a 19″ plug-in card, with a wall-mounted housing, for insertion in a control panel or with a 19″ frame.


Record breaches of harmonic limits

When a limit (harmonic or voltage THD) is exceeded, the power quality interface records the spectrum of all harmonics from the 2nd to the 50th harmonic. The broad spectrum of harmonics recorded allows the user to carry out well-founded analysis.

All the standards and protocols upheld – making our products fit for the future

  • EC 61010-1 / DIN EN 61010-1
  • IEC 60255-22-1 / DIN EN 60255-22-1
  • IEC 61326-1 / DIN EN 61326-1
  • IEC 60529 / DIN EN 60529
  • IEC 60068-1 / DIN EN 60068-1
  • IEC 60688 / DIN EN 60688
  • IEC 61000-6-2 / DIN EN 61000-6-2
  • IEC 61000-6-4 / DIN EN 61000-6-4
  • IEC 61000-6-5 / DIN EN 61000-6-5

The right interface for every application

Our power quality interface has two RS 232 interfaces (COM 1 and COM 2), an RS 485 bus interface (COM 3), two interfaces each of the system and transport bus E-LAN and 2x RS 485 time and trigger bus. This device is thus certain to have the right interface for every application.

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the PQI-D measuring device?

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The suitable Software offers the user more reasons, to use the PQI-D

The WinPQ system solution for all built-in A. Eberle fault recorders, power quality monitoring devices and mobile network analyzers. Monitor power quality permanently – from the high-voltage grid to the end-user in a system. Intuitive operation despite the vast amount of data handled.

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