For the targeted analysis of grid disturbances and voltage problems in electrical systems. Suitable for grid operators, industry, and technical infrastructure when causes need to be clearly documented.

Typical Application:

  • Recurring faults whose cause must be clarified on site
  • Unusual voltage conditions at individual feed points or outputs
  • Clarification of causes after failures, malfunctions, or quality complaints
  • Documentation of conditions before and after changes to the system

This Device Is Suitable If:

  • You not only suspect malfunctions, but need to prove them conclusively.
  • You want to clearly identify the time and cause of abnormalities.
  • You need measurement data for internal decisions or for third parties.
  • You want to perform a time-limited analysis directly at the affected point.

For Harsh Environments and Tight Spots

PQ-Box 50

The perfect tool for energy management audits to ISO 50001. Our universal power quality meter PQ-Box 50, has been developed for wide-ranging use and comes with an integrated power unit and robust housing, all in a small space. This network analyzer is for universal deployment and is ideal for mobile measurements in harsh environments or where space is highly limited.

Further questions or want to start an enquiry? Please click “Product Enquiry”.

Industrial plants & production facilities
Transmission & distribution grids (HV/MV/LV)
Data centers & IT infrastructure
Charging infrastructure for e-mobility
Ground-mounted photovoltaic systems
Onshore windparks
Local network stations (MV/LV)
Residential districts with PV, charging points & heat pumps
Emergency power systems / emergency power supply
Transformer stations at grid nodes
Battery storage & storage power plants (MV/LV)
Rail Grid 16.7 Hz

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.

Cross-Product Downloads

Special Publications
Flyer
Feature Matrix
Product Overview A. Eberle
A. Eberle Seminars in Nuremberg

Accessories

Catalogue
Current Clamp
Rogowski Current Clamps
Adapter Cable Set
Remote Access
Calib-Box
External Power Supply

An Extremely Robust and Compact Housing

When developing our PQ-Box 50, the device’s compact design was our primary concern. With very reduced dimensions of only 220 x 110 x 40 mm and a weight of just one kilo, the power quality meter shines wherever restricted space is an issue. Naturally, despite its small size, our PQ-Box 50 not only reaches protection class IP 65 but is also a certified Class A device.

class-a-analyzer-power-quality
netzanalysator-a-eberle-pq-box-50

WLAN Interface for Cableless Communication with the Software & App

The data recorded by the power quality meter PQ-Box 50 can be transferred either by USB interface or a rapid WLAN interface to the evaluating PC. The device comes with our extensive WinPQ mobile evaluation software, which can be installed on as many PCs as you wish. To round off the excellent user experience, we have developed the PQ-Box app for both Android and iOS. The app allows you to display a wide range of online measurements and alter configurations for current and voltage transformers, measurement intervals or nominal voltages of the PQ-Box 50.

All the Standards and Protocols Upheld – Making Our Products Fit for the Future

The power quality meter PQ-Box 50 creates an automatic standard assessment and event record to:

  • EN 50160
  • IEC61000-2-2
  • IEC61000-2-12
  • IEC61000-2-4
  • NRS048
  • IEEE 51
class-a-analyzer-power-quality-box

Standard Accessories & Device Installation – How Your PQ Box Arrives

  • power quality meter »PQ-Box 50«
  • USB cable
  • 4mm safety sockets incl. inserts for worldwide sockets
  • 5 Delphin terminals (3x red, 1 x green, 1 x blue)
  • Case for measuring device and accessories
  • Hardware operating instructions (software instructions via website and included in software)
  • QR code for downloading WinPQ mobile software

Analyse Faults in the Ripple Control Telegram With Ripple Control Analysis

In addition to measuring the ripple control level, the class a analyzer is also able to trigger a ripple control frequency and capture the voltages and currents for a set frequency. The complete telegram can be shown to a length of 210 seconds, while a wide range of parameters can be set in the measurement device (triggering threshold, recording threshold, ripple control frequency, bandwidth of the filter curve for ripple control frequency).

You Have Questions About the PQ-Box 50?

Our Specialists Will Be Happy to Help You!


Contact Us

Not Sure What Device Is the Right One for You?

Find the Right Power Quality Analyzer for Your Application

PQ-Box ONE

netzanalyse-mobil

PQ-Box 50

mobiler-netzanalysator

PQ-Box 150

mobiles-netzanalyse-gerät

PQ-Box 200

netzanalysator-gerät

PQ-Box 300

40,96 kHz

Sampling frequency voltage

40,96 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
netzanalyse-mobil

20,48 kHz

Sampling frequency voltage

20,48 kHz

Sampling frequency current

-

4 (16-bit)

Input voltage (resolution)

4 (16-bit)

Input current (resolution)

-

1 GB

Memory size

WLAN

2 h

Operating time via battery
mobiler-netzanalysator

20,48 kHz

Sampling frequency voltage

20,48 kHz

Sampling frequency current

-

4 (24-bit)

Input voltage (resolution)

4 (24-bit)

Input current (resolution)

-

4GB (32)

Memory size (optional)

S1

WLAN

4,0 h

Operating time via battery
mobiles-netzanalyse-gerät

40,96 kHz

Sampling frequency voltage

40,96 kHz

Sampling frequency current
up to

4 MHz

Sampling frequency transient measurement

4 (24-bit)

Input voltage (resolution)

5 (24-bit)

Input current (resolution)

Binary input

8GB (32)

Memory size (optional)

S1

WLAN

4,0 h

Operating time via battery
netzanalysator-gerät

40,96 kHz

Sampling frequency voltage

40,96 kHz

Sampling frequency current

409,60 kHz

Sampling frequency transient measurement

4 (24-bit)

Input voltage (resolution)

5 (24-bit)

Input current (resolution)

Binary input

8 GB (32)

Memory size (optional)

S1

WLAN

3,5 h

Operating time via battery

WinPQ mobile
High-quality analysis software

WinPQ mobil was designed to support the user in evaluating the data. The clear presentation of the measured values was the main focus. Thus, the software not only advances the PQ-Box, but also the user.

News From the Product Group

PQMobil - News

General Knowledge

Electrical Resistance

13. May 2026

Electrical resistance is one of the fundamental quantities in electrical engineering. This article explains the definition, unit, symbol, Ohm's law, resistance measurement and the role of resistance in[...]

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

Blogpost

Power Quality Analysis 2026: Guide to Measurement & Assessment

6. May 2026

Power quality analysis 2026: guide to standards, Class A measurement, monitoring, and practical assessment workflows.[...]

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

Webinar

»PQMobil« Webinar: Power Quality Analysis in Public & Industrial Power Grids with A. Eberle PQ-Boxes - Part 4

27. April 2026

Webinar recording from 2026-04-15: »PQMobil - Power Quality Analysis in Public & Industrial Power Grids – Part 4«. [...]

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

Webinar

»PQ-Box ONE« - The New Single-Phase Power Quality Analyser for Measurements

12. March 2026

Webinar recording from 2026-02-25: »PQ-Box ONE« - The New Single-Phase Power Quality Analyser for Measurements [...]

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 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.[...]

Read more

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.[...]

Read more

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.[...]

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

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.[...]

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

General Knowledge

Voltage Measurement Can Improve the Quality of Supply

7. August 2025

Read more

Contact request:



* Mandatory

Your data is being processed

a-eberle kontakt newsletter ×

The download started automatically in a new window.

How did you hear about us?
Consent to data transfer*

* Mandatory fields