The Fix-Installed Energy Logger for Power-Quality-Experts
PQI-DE
Many Functions United in a Single Device
PQI-DE
The PQI-DE is a energy logger, power quality measurement device, fault recorder and residual current measurement device all in one. The device combines numerous functions. It can be used as a power quality interface to fulfil network quality standards or to check the technical connection guideline. It also offers SCADA interfaces and is fitted with a fifth power input. This means the device offers everything power quality experts need.
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Cross-Product Downloads
Cross-Product Downloads
Special Publications
Flyer
Product Overview A. Eberle
A. Eberle Seminars in Nuremberg
PQI-DE
PQI-DE
Instruction Manual
Installation Manual
Technical Data Sheets
Release Notes
Firmware
Interface Lists
Tender Specification
Project Planning Data (3D Models)
Type Test Certificate
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
Records Transients at up to 24 µs
Transients are increasingly a problem in electrical grids. The energy logger PQI-DA smart offers the ability to measure these transients exactly down to 24 µs, allowing precise network analysis. Analysis with our device makes the grid not only more stable but also safer.
Standards and Protocols – Making Our Products Fit for the Future
- EN 50160 (2013)
- IEC 61000-2-2
- IEC 61000-2-12
- IEC 61000-2-4 (Klasse 1;2;3)
- NRS 048
- IEEE 519
- IEC 61000-4-30 Klasse A
- IEC 61000-4-7
- IEC 61000-4-15
Fulfill the Measurement Standards of Tomorrow Today
Our fix installed all-rounder offers a wide range of measurement options that represent the standards of tomorrow, today. Thus, our PQI-DE energy logger already provides frequency measurement from 2 – 20 kHz. Consider buying one of our devices as investing in the solutions of the future.
Residual Current Measurement RCM to 40.96 kHz Over 5 Current Channels
Residual current measurement has a wide range of applications. On the one hand, the energy logger can be used to substitute repeat insulation tests to DIN VDE 0150-100/A1; while in connection with a switch-off device it can also provide fire and material protection. The PQI-DE is the first device in the product portfolio that can do both.
IT Security From the Manufacturer With ISO 27001 Certification
Certified security via User Rights Management (URM) and Role Based Access (RBAC) thanks to highly encrypted data transmission.
High-quality power quality monitoring with the option of quick and easy current drop monitoring helps to recognise trends at an early stage and offers the advantage of being able to initiate countermeasures in good time.
Measure Transformers in the Local Substation With High Precision - With the PQ Network Analysers »PQI-LV«, »PQI-DA smart« or »PQI-DE«
- Measure voltage, current, power and power quality parameters at the transformer infeed with less than 0.1% deviation in accordance with IEC61000-4-30 Class A Ed. 3 to assess voltage quality via power quality parameters in accordance with EN50160 and IEC61000-2-2.
- Analysis of flicker, THD, harmonics (H2-H50), supraharmonics 2-20kHz, transients & PQ events with fault recording in the event of under- or overshoot.
Measuring, Recording and Analysing Outgoing Circuits - With the »I-Sense« Current Measurement Technology
- Current measurement L1/ L2 / L3 / (N) with min. and max. values for up to 16 outgoing circuits.
- Simple connection possible using existing ‘third party devices’, such as safety edges with intelligent transformers.
Reporting to the Point - With the »WebPQ®« Analysis Software
- »WebPQ®« software solution for quick and easy evaluation of power quality data and outgoing feeders using clear, configurable reports.
Quick Comparison: PQI-LV vs. PQI-DA Smart vs. PQI-DE
Find the Right Power Quality Analyzer for Your Application.
PQI-LV
PQI-DA Smart
PQI-DE
• Secondary substation
• Depth of the grid (cable-/light-/sub-distributors)
• Industrial power grids (machinery/processes & plants)
• Retrofits
Low-voltage
✔️
10.24 kHz / Optional 40,96 kHz (B1)✔️
✔️
2 kHz to 20 kHz according to IEC61000-4-7 via software option (B1)✔️
CCCI, SSH, HTTP(S)Modbus RTU & TCP (Standard)
✔️
IEC60870-5-104 (P1), IEC61850 (P2), Modbus Master (P3) MQTT*✔️
Radius, RBAC, URM, encryption✔️
1GB ~ 140 weeks with standard template❌
DIN-rail
130 x 90 x 58mm
L x W x HDirect
230 / 400 / 690VRogowski coils & current sensors
350mV input
❌
❌
❌
Optional
• PCC / Point of Common Coupling (IEC 61000-2-2)
• POC / Point of Connection (EN 50160)
• Secondary substation with increased requirements
• Industrial applications
Low-, medium- and high-voltage
✔️
10.24 kHz / Optional 40,96 kHz (B1)✔️
✔️
2 kHz to 20 kHz according to IEC61000-4-7 via software option (B1)✔️
CCCI, SSH, HTTP(S)Modbus RTU & TCP (Standard)
✔️
IEC60870-5-104 (P1), IEC61850 (P2), Modbus Master (P3) MQTT*✔️
Radius, RBAC, URM, encryption✔️
1GB ~ 140 weeks with standard template1.7 inches
DIN-rail,
Front panel installation using adapter
160 x 90 x 58mm
L x W x HDirect and transducer measurement
100 / 230 / 400 / 690V1A/5A measuring transformer (C30)
1A/5A protection transformer (C30)
Rogowski coils (C40)
Sensor technology (C44)
DC (C45)
2 / 2
❌
❌
✔️
• Substations
• Industrial applications
• Grid code compliance
• High-precision frequency measurements
• Residual Current Monitoring (RCM)
Low-, medium- and high-voltage
✔️
10.24 kHz / Optional 40.96 kHz (B1)✔️
✔️
2 kHz to 20 kHz according to IEC61000-4-7 via software option (B1)✔️
CCCI, SSH, HTTP(S)Modbus RTU & TCP (Standard)
✔️
IEC60870-5-104 (P1), IEC61850 (P2), Modbus Master (P3) MQTT*✔️
Radius, RBAC, URM, encryption✔️
1GB ~ 140 weeks with standard template5 inches
Front panel installation
144 x 144
144 x 144 x 90 mm
L x W x HDirect and transducer measurement
Small signal transducer (E3)
1A/5A measuring transformer (C30)
1A/5A protection transformer (C30)
Rogowski coils (C40)
Mini current clamps (C44)
DC (C45)
8 / 4
✔️
5th current feeder (30mA)✔️
PT100 / PT1000 / KTY✔️
Do You Have Questions About
the PQI-DE Measuring Device?
Our Specialists Will Be Happy to Help You!
Contact Us
Power Quality Analysis Software
Suitable for PQI-DE
WebPQ®
The Easy Way to Analyse Your Power Quality Measurement Data
The new WebPQ® is the central analysis software for all fixed installed fault recorders, power quality monitoring devices and for the evaluation of the portable power quality analysers* from A. Eberle.
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Comprehensive 2026 guide to power quality analysers: selection criteria, applications, standards, and future trends for reliable power quality monitoring.[...]
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Webinar
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Webinar recording from 2025-11-26: »Cyber Security« - A Challenge for European Energy Companies[...]
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Blogpost
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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[...]
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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[...]
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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.[...]
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Special Publication
Continuous Power Quality Monitoring in the Jupiter Data Centre - Voltage Quality at Exascale Level
5. November 2025
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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 [...]
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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.[...]
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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[...]
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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.[...]
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Blogpost
University Excursion: Pentecost Excursion of the Friedrich-Alexander-University Erlangen-Nuremberg (FAU)
14. July 2025
As a company dedicated to innovation, education, and the energy transition, we are pleased to have once again supported the Whitsun excursion of Friedrich-Alexander University Erlangen-Nuremberg (FAU)[...]
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14. July 2025
Welcome to the team! We welcome our new colleagues at A. Eberle.[...]
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Specialist Training on Power Quality
18. June 2025
On 27 May 2025, everything revolved around electricity, faults and how to recognise them in a specialist training course on power quality at the Balthasar Neumann Technical Centre in Trier (BNT).[...]
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Webinar
»PQSys« Webinar: PQ-Monitoring & Feeder Current Measurement in Low-Voltage Grids 3
19. May 2025
Webinar recording from 2025-05-14: »PQSys - PQ-Monitoring & Feeder Current Measurement in Low-Voltage Grids - part 3«. [...]
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Webinar
»PQSys« Webinar: Presentation: »PQI-LV« - The New PQ-Analyser for Transparency in the Low-Voltage Grid
4. March 2025
Webinar recording from 2025-02-19: »PQSys - Presentation: »PQI-LV« - The New PQ-Analyser for Transparency in the Low-Voltage Grid«. [...]
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Measuring the Voltage Drop
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The voltage drop is the difference between the voltage at the beginning and end of an electrical line. In an electrical network, the voltage can be reduced by the resistance and impedance of the lines,[...]
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Product innovation
Product Announcement: »PQI-LV« Released on 05.06.2024
22. January 2025
PQI-LV - cost-efficient class A power quality analyser for precise PQ monitoring in low voltage. Available to order now.[...]
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Training Video
»PQSys« Training Video 1: Presentation New Functions of Firmware V3.2 for PQI-LV, PQI-DA smart & PQI-DE
17. January 2025
In this video, we present the new functions and extended options with firmware version 3.2 for our fixed installed power quality analysers and fault recorders PQI-LV, PQI-DA smart and PQI-DE of the PQSys[...]
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Webinar
»EOR-3DS« & »PQSys« Webinar: Digitise and monitor local network substations for the future with »EOR-3DS« & »PQSys«
15. October 2024
Webinar recording from 2024-10-10: »EOR-3DS« & »PQSys - Digitise and monitor local network substations for the future with »EOR-3DS« & »PQSys««. [...]
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