Power Quality Analyzers With Fault Recorder Function
For analyzing network disturbances, determining causes, and evaluating supply quality during ongoing operations.
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Our power quality analyzers support you in the structured analysis of grid problems and the objective evaluation of voltage quality. The solutions are aimed at energy suppliers, industry, and technical service providers responsible for stable and compliant power grids.
Typical Application:
- Clarification of network problems with unclear causes or contradictory statements
- Temporary measurement campaigns for objective evaluation of voltage quality
- Root cause analysis for malfunctions, complaints, or liability issues
- Support for planning, commissioning, or acceptance of electrical systems
These Devices Are Suitable If:
- Temporary, flexible measurement is required.
- Well-founded decisions are to be made based on real measurement data.
- The measurement is to be carried out independently of location and without interfering with continuous operation.
- Different measurement tasks must be covered with one device.
Power Quality Analyzer, Measurement Device and Fault Recorder in One
Products
Application Areas
PQMobile - Mobile Network Analysis and Troubleshooting in the Event of a Fault
A. Eberle GmbH & Co. KG
Measure. Regulate. Across All Grids.
A. Eberle GmbH & Co. KG, founded in 1980 and headquartered in Nuremberg, Germany, operates in the field of measurement and regulation technology for the energy sector as well as for medium-sized and large industrial companies. Our products and services ensure and enhance the availability of energy supply across all voltage levels and support the integration of renewable energy sources into power grids.
»PQ-Box« – The First Choice for Mobile Power Quality Analysis and Rapid Fault Diagnosis
Engineered for tough conditions. Built for rapid analysis. Designed for intuitive operation.
The PQ-Box family combines powerful, portable power and frequency analysers, power meters, and transient recorders in one compact device.
Ease of use and intuitive operation were key priorities during development. For fast and reliable analysis of power quality, these high-precision Class A instruments (IEC 61000-4-30 Ed.4) are equipped with a wide range of trigger functions and pre-installed standard-compliant report templates.
All mobile power quality devices fulfil the high demands of IP65 and can also be installed and used outside. They also have a large operating temperature range of – 20°C to + 60°C.
In addition to IEC 61000-4-30 Ed.4, the measuring devices also fulfil all requirements of the measuring device standards IEC62586-1 and IEC62586-2 Ed.2 for Class A devices.
NEW: Power Quality Services by A. Eberle
Power Quality
Services
Expert Knowledge That Moves You Forward
We offer you power quality audits with troubleshooting in accordance with EN 50160 and IEC 61000 and support you with our expert know-how. As the market leader in the field of mobile power quality devices, we can draw on a wide range of network analyzers with the appropriate accessories for our services.
Our Portfolio at a Glance
»PQMobil« - The First Choice for Portable Grid Analysis & Rapid Fault Diagnosis
Not Sure What Device Is the Right One for You?
Find the Right Power Quality Analyzer for Your Application
PQ-Box ONE
PQ-Box 50
PQ-Box 150
PQ-Box 200
PQ-Box 300
40,96 kHz
Sampling frequency voltage40,96 kHz
Sampling frequency curent-
2 (16-bit)
Input voltage (resolution)1 (16-bit)
Input current (resolution)-
1 GB
Memory size•
WLAN / USB-C(UPS 30 s)
Operating time via battery 20,48 kHz
Sampling frequency voltage20,48 kHz
Sampling frequency current-
4 (16-bit)
Input voltage (resolution)4 (16-bit)
Input current (resolution)-
1 GB
Memory size•
WLAN2 h
Operating time via battery 20,48 kHz
Sampling frequency voltage20,48 kHz
Sampling frequency current-
4 (24-bit)
Input voltage (resolution)4 (24-bit)
Input current (resolution)-
4GB (32)
Memory size (optional)S1
WLAN4,0 h
Operating time via battery 40,96 kHz
Sampling frequency voltage40,96 kHz
Sampling frequency current4 MHz
Sampling frequency transient measurement4 (24-bit)
Input voltage (resolution)5 (24-bit)
Input current (resolution)•
Binary input8GB (32)
Memory size (optional)S1
WLAN4,0 h
Operating time via battery 40,96 kHz
Sampling frequency voltage40,96 kHz
Sampling frequency current409,60 kHz
Sampling frequency transient measurement4 (24-bit)
Input voltage (resolution)5 (24-bit)
Input current (resolution)•
Binary input8 GB (32)
Memory size (optional)S1
WLAN3,5 h
Operating time via battery
WinPQ mobile
High-End Analysis Software
The purpose of the program is to prepare the archived power quality measurements and fault events from all PQ Boxes for the viewer and present them appropriately on the screen of the PC.
PQ-Box App
Easily Read out Power Quality Data From Your Tablet or Smartphone
The PQ-Box app enables wireless access to your PQ-Box via WLAN with visualisation and display of various live measurement data, including basic parameterisation of the device. In addition to an overview of the online data, the recorder and events, power and energy, pointer diagram, oscilloscope image and harmonics of the PQ Box can be viewed. Basic parameterisation of the device is also possible. The intuitive operation guarantees simple and mobile operation of your PQ box from A. Eberle.
The Right Box for Every Frequency
Our Mobile Power Quality Analyzers
Today's devices and equipment such as switched-mode power supplies, frequency converters, controlled drives, charging devices for e-mobiles or LED lighting, work internally with high clock frequencies and power to be controlled efficiently. These can lead to both line-bound and field-bound (coupled) influences in the energy grid.
Typical clock frequencies of systems and devices that we have to reckon with in our networks today:
- 4 kHz to 20 kHz: Frequency converter drive
- 16 kHz to 22 kHz: Solar inverter (400V)
- 2 kHz to 6 kHz: Wind power plant (medium voltage grid)
- 10 kHz to 80 kHz: E-mobile
- 8 kHz to 20 kHz: Active grid filter
- 15 kHz to 25 kHz: UPS systems
- 20 kHz to 200 kHz: Electronic ballast
- 30 kHz to 300 kHz: Switching power supplies
The power quality analyzers from A. Eberle have a high bandwidth which is free of aliasing effects up to 170 kHz (PQ Box-300).
These devices can be used to detect the mains feedback in the super-harmonic range of solar inverters, e-mobiles and frequency converters. The IEC61000-2-2 standard already offers compatibility levels for the public grid of up to 150 kHz. These limit values are already stored in our measurement technology.
News From the Productgroup
PQMobil - News
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.[...]
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Blogpost
Power Quality Analyzer Guide: Your Entry Point for 2026
29. January 2026
Comprehensive 2026 guide to power quality analysers: selection criteria, applications, standards, and future trends for reliable power quality monitoring.[...]
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Blogpost
Short video presentation »PQ-Box ONE«
15. January 2026
Ahead of the official launch on February 25, 2026, we are releasing a short video about the new »PQ-Box ONE« that provides an initial overview of the key features of the new PQ measuring device.[...]
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Blogpost
»PQ-Box 150« and »PQ-Box ONE«
15. January 2026
PQ-Box 150 and PQ-Box ONE in practical comparison: PQ-Box 150 and PQ-Box ONE both deliver Class A measurements, but differ in terms of installation, handling and areas of application.[...]
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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[...]
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Training Video
»PQMobil« Training Video 8: Setting up remote access for the PQ-Box
21. November 2025
This video shows how to configure a PQ-Box remotely via Wi-Fi, LAN, network, and the Internet using a VPN tunnel, view live data, and transfer measurement data. Enjoy the video.[...]
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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
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.[...]
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Webinar
»PQMobil« Webinar: New Features/Functions for Your PQ-Box/es: Presentation of WinPQ mobil V8 & V7 legacy
5. August 2025
Webinar recording from 2025-07-29: »PQMobil - New Features/Functions for Your PQ-Box/es: Presentation of WinPQ mobil V8 & V7 legacy«. [...]
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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[...]
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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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Blogpost
Further Growth at A. Eberle
14. July 2025
Welcome to the team! We welcome our new colleagues at A. Eberle.[...]
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Blogpost
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
»PQMobil« Webinar: Power Quality Analysis in Public & Industrial Power Grids – Part 3
29. April 2025
Webinar recording from 2025-04-02: »PQMobil - Power Quality Analysis in Public & Industrial Power Grids – Part 3«. [...]
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