Energy Quality Assessment Software

Electrical grids are currently undergoing radical change. Active power electronics as used in switching power supplies and inverters are ubiquitous. To achieve CO2 reduction goals, small, renewable energy generators are being installed everywhere. Big, conventional power plants are disappearing.

Phenomena such as backfeeding, equipment overloads, voltage spikes at feed-in points and asymmetries are part of day-to-day business. This is a problem for highly optimized data centres and industrial controls that are sensitive to short dips in supply, harmonics and transient events. Even the stability of the grid is vulnerable.

With the combination of the Class A-certified PQSys family of measuring devices and the fully automated WinPQ server solution, A. Eberle offers a comprehensive voltage quality system that will stand up in court. It enables users to document, evaluate and prove the quality of the voltage at any time. Faults can be detected, the source determined and the cause remedied early.

All of the installed fault recorders and mobile grid analyzers from A. Eberle are supported and can be connected across grid levels, in large numbers, to an SQL database server. 

Communication over SCADA protocols, such as IEC 61850, Ethernet, 3G/4G and analogue dial-up modems is possible. The WinPQ software is at its absolute best when it comes to controlling large amounts of data. Automated reporting assistants automatically explore the database and report only the things you need to see. You can receive standards reports and alerts by email or in standard formats such as Comtrade, PQDiff or as a PDF document on the hard disk. It’s that easy!

Our fine-tuned hardware and software solution enables you to keep an eye on the voltage quality at all times.

“WinPQ System solution for all installed fault recorders, power quality monitoring devices and mobile grid analyzer by A. Eberle Continuous power quality monitoring – from high voltage to the end customer as a system. Intuitive despite a large amount of data.”


The philosophy behind the WinPQ system: An ‘All-in-one’ system overview

The WinPQ client-server software with database is an intelligent system solution that automatically monitors faults and the grid quality in parallel across several measuring devices. Different device versions are available for different requirements and voltage levels. The evaluation software supports all installed A. Eberle fault recorders. TCP/IP, fibre optics, RS-232, 3G, 4G and analogue modems can be used to communicate with the devices.

In addition, all of the data measured by the mobile grid analyzers can be imported into the database and correlated with the data on the installed devices.

The database is generally installed on a server to guarantee it’s always running. The database supports any number of concurrent WinPQ clients.

WinPQ can be used with the following databases: MySQL, Maria DB, MS SQL and Oracle DB.

The system’s key features include;

  • All devices are read concurrently. This assures the system’s fast response time.
  • Automatic error log reporting and auto matic creation of power quality reports, also for the control room.
  • User-friendly software that enables you to easily monitor the many devices and large amount of data.

The principle: Top-down analysis

The WinPQ database analysis software enables you to easily create abstract views of many measurands that have no time correlation: from the measured data’s timing diagrams to highly accurate error logs.

Full overview

A click of the mouse is all that is needed to generate an EN 50160 report: with millions of records across the whole measuring area. If a measurement is exceeded, the time behaviour (cyclical data) can be directly displayed.

Timing diagram

Permanently archive several years of cyclical data timing diagrams. Direct link with sampling values if thresholds are exceeded.

Sample values

Highly accurate analysis across the 10 ms TRMS logs and sampling values with up to 40.95 kHz.

Fault Recorder

The devices have several fault recorders with different sampling rates with different levels of detail and recording lengths. There is an extensive menu of trigger criteria for recorders. The duration and pre-event time are user definable.

The devices have the capability of adjusting the recording length independently of the fault duration on the grid.

The WinPQ system can display several error logs from different installed and mobile grid analyzers in a diagram. Messages, PQ events and binary signals can also be displayed and used in other calculations and correlations with measuring data.


 ½ period recorder TRMS average values of all voltages (phase-to-phase and phase-to-ground), currents, active power, reactive power, apparent power and frequency.


Power Quality Report and Statistics

WinPQ offers an extremely wide range of power quality reports and statistics. There are detailed reports per measuring point and overview reports for a group of devices or voltage level or grid area.

3D and 4D Graphics

3D and 4D graphics provide an overview of many stations across several measured values. Analysis of the load profiles of several stations across arbitrary periods. Clicking on a bar opens the timing diagram for this situation or the cumulative frequency analysis. The number of grid events in a voltage level or device group can be displayed over an arbitrary period of time in a four-dimensional overview report. 


Voltage-current harmonics reports in accordance with IEC61000/4/7 up to 9kHz

View of all voltage or current harmonics 2nd to 50th. Harmonics and frequency bands 2 kHz to 9 kHz in accordance with IEC 61000-4-7 is possible. All measured values are displayed with the corresponding threshold for the specified standard.

Automatic Reporting

The devices automatically send faults to the database as soon as they occur. PDF documents are created automatically and can be sent to email addresses or printers.

The system automatically archives power quality reports and long-term statistics. 3D graphics help keep track of the many devices in a grid area or voltage level.


Alert Management

A separate flow plan can be created for each measuring point: Which fault from which event size should be reported to whom?

Alerts can be reported optically, acoustically or by email and text message. Acknowledge functions, pop-up windows and sound are available to report alerts.


The ‘Maps’ option displays all of the stations on the map by their geographic coordinates. The maps are available offline. An internet connection is not needed.

Many of the available measured values can be displayed graphically on the map as coloured bars. The graphics or charts can display the current voltage level, load flow and power quality reserves.

Data Sheet
User Manual