The Flexible Power Quality Interface (*discontinued, can only be ordered until 31.12.2026)
PQI-D
Carry out all measurement tasks with a single device.
PQI-D
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.
Further questions or want to start an enquiry? Please click “Product Enquiry”.
Cross-Product Downloads
Cross-Product Downloads
Special Publications
Flyer
Product Overview A. Eberle
A. Eberle Seminars in Nuremberg
PQI-D
PQI-D
Instruction Manual
Technical Data Sheets
Firmware
DSP-100 MHz
DSP-200 MHz
Accessories
Accessories
I-Sense: Current Feeder Measurement
Technical Data Sheets
Instruction Manual
I-Sense Flyer
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.
Do you have questions about
the PQI-D measuring device?
Our specialists will be happy to help you!
Contact us
WebPQ®
The Easy Way to Analyse Your Power Quality Measurement Data
WebPQ® is the new central analysis software for all fixed installed fault recorders, power quality monitoring devices and portable grid analysers from A. Eberle.
More Power Quality Devices
Discover our range of products
News from the Productgroup
PQSys - News
General Knowledge
Digital Substation
17. June 2026
Table of Contents 1. Classification: Why the digital substation is becoming more important 2. From grid node to measurement and […][...]
Read more
Blogpost
International Partner Week 2026 - Exchange, knowledge transfer and collaboration in Nuremberg
1. June 2026
We were delighted to welcome our international partners to Partner Week 2026. The chance to chat in person, seeing familiar faces and making new acquaintances made the week a special one for us.[...]
Read more
Webinar
»PQSys« Webinar: PQ-Monitoring & Feeder Current Measurement in Low-Voltage Grids 4
28. May 2026
Webinar recording from 2026-05-13: »PQSys - PQ-Monitoring & Feeder Current Measurement in Low-Voltage Grids - part 4«. [...]
Read more
General Knowledge
Measuring Equipotential Bonding
13. May 2026
Measuring equipotential bonding is essential for verifying low-resistance, continuous connections between conductive parts. This article explains equipotential bonding, relevant standards, typical measurement[...]
Read more
General Knowledge
Insulation Resistance and Insulation Measurement
30. April 2026
Insulation measurement helps assess the safety and condition of electrical installations. This article explains insulation resistance measurement, relevant limits, test voltages and practical interpretation[...]
Read more
Blogpost
A. Eberle and Bregal Unternehmerkapital enter into a growth partnership
14. April 2026
A. Eberle and Bregal enter into a growth partnership. The partnership with BU is intended to accelerate A. Eberle’s international expansion, innovation and technological advancement.[...]
Read more
General Knowledge
Power Plant Controller: Measurement Values at the Grid Connection Point
26. March 2026
Power Plant Controller operation at the grid connection point depends on low-latency, accurate, and dynamically reliable measurement values. This article explains the technical requirements, the role of[...]
Read more
General Knowledge
Measuring Harmonics: Detecting Disturbances in Buildings
6. March 2026
Harmonic distortion and supraharmonics can cause flicker, nuisance tripping and device malfunctions in modern buildings. This article explains how to measure harmonics at the socket outlet and interpret[...]
Read more
Blogpost
Power Quality Monitoring for Electrical Contractors - Mobile Network Quality Measurement with the PQ-Box ONE
2. March 2026
How a portable power quality analyzer like the PQ-Box ONE helps electrical professionals identify voltage disturbances, improve documentation and make reliable technical decisions.[...]
Read more
Blogpost
Power Quality Monitoring: Risks of Poor Power Quality
18. December 2025
Power quality monitoring translates “invisible” disturbances into measurable causes and KPI impacts. This guide explains common power-quality events and a practical workflow to measure, evaluate and[...]
Read more
Webinar
»Cyber Security« Webinar: A Challenge for European Energy Companies
3. December 2025
Webinar recording from 2025-11-26: »Cyber Security« - A Challenge for European Energy Companies[...]
Read more
Blogpost
A. Eberle at the Schwabach City Run 2025
24. November 2025
A. Eberle was represented by 37 participants at the 2025 Schwabach City Run, setting a new internal record for participation. Particularly noteworthy is Benjamin Rentsch's first place in the M 35 40 age[...]
Read more
General Knowledge
Total Harmonic Distortion (THD) in Low Voltage Networks
20. November 2025
This study examines harmonic distortion in modern low-voltage grids, showing real measurement data, key standards (EN 50160, IEC 61000-3-2/-4-30) and practical ways to reduce THD in applications such as[...]
Read more
Special Publication
Power Quality Monitoring in Buildings - A Key Factor in Modern Building Design
12. November 2025
Discover how Power Quality Monitoring in Buildings improves reliability, efficiency and grid stability. Learn more in our technical article.[...]
Read more
Special Publication
Continuous Power Quality Monitoring in the Jupiter Data Centre - Voltage Quality at Exascale Level
5. November 2025
Read more
Webinar
»PQSys« Webinar: »WebPQ®« - The New Power Quality Software for Continuous Grid Monitoring
27. October 2025
Webinar recording from 2025-09-25: »PQSys« Webinar: »WebPQ®« - The New Power Quality Software for Continuous Grid Monitoring [...]
Read more
General Knowledge
Power in Multiphase Systems
7. August 2025
This technical report highlights the special features of power transmission in three-phase systems and offers valuable insights into the optimisation and analysis of modern power grids.[...]
Read more
Blogpost
Visit From the Rudolf Diesel Technical School at A. Eberle
15. July 2025
We were happy to welcome you, Rudolf-Diesel-Fachschule! Yesterday, we had the pleasure of welcoming two classes of future electrical engineering technicians from the Rudolf-Diesel-Fachschule Nürnberg[...]
Read more
Blogpost
TOP 100 Awards 2025: Innovation for the Energy Future
15. July 2025
💡 As part of the TOP 100 Awards 2025, we were honored to receive a special recognition last week in Mainz – personally presented by TV host and science journalist Ranga Yogeshwar.[...]
Read more
