Our Power Quality Devices: Always Ahead of Its Time!

News in The “Technical Rules for the Assessment of Network Disturbances”

In Germany, Austria, Switzerland and the Czech Republic, the D-A-CH-CZ guideline determines the rules of the connection of customer installations to the public grid regarding the evaluation of currents. The booklet “Technical Rules for the Assessment of Network Disturbances” is published by the international working group EMC & Power Quality (D-A-CH-CZ). In recent years, intensive work has been put into publishing a new version. This version is a much more comprehensive guideline and has recently been published and provided with many innovations and detailed specifications.

What impact will the change have on users of A. Eberle’s power quality measurement technology?

While the old version only evaluated odd-numbered current harmonics up to atomic number 25, the new guideline includes the entire frequency range up to 9 kHz.

Devices Must Detect the Range of Superharmonics. From 2 kHz to 9 kHz in Conformity With the Standard With 200 Hz Bands According to en 61000-4-7.

The maximum permissible supraharmonic currents of a system connected to the mains can be calculated using the following formula. Please note that the formula is to be used for a nominal mains voltage for Un = 400 V. For deviating voltages, linear conversion is possible.

I_{b zul}= \frac{1}{k_{b}}*\frac{3,3*b^{-0,52}*1 A}{(10,25-\frac{9kHz - b}{kHz})* (r+(1-r)*\frac{0,57MVA}{S_{k V}}}

Ibzul
kb
Skv

b
r

Permissible superharmonic current
Resonance factor for the superharmonic with centre frequency b

Short-circuit power
Centre frequency of the frequency band b
Allocation factor

The Good News for Our Customers: Nothing Will Change for Them!

As the innovation leader in the field of mobile power quality measuring devices, our measuring technology is always ahead of its time. The mobile PQ boxes, as well as the Power Quality System analyzers PQI-DE and PQI-DA smart, have been meeting these specifications for a long time.

Extract from the IEC 61000-4-7 standard (harmonic measurement method 2 kHz to 9 kHz)
Example of standard evaluation PQ boxes of the 200 Hz frequency bands

Do You Need More Information?

Contact Us!


Contact

The A. Eberle Blog

Our latest articles

TOP 100 Awards 2025: Innovation for the Energy Future

💡 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

Visit From the Rudolf Diesel Technical School at A. Eberle

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 to our company in Nuremberg.

Read more

University Excursion: Pentecost Excursion of The Friedrich-Alexander-University Erlangen-Nuremberg (FAU)

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) this year.

Read more

Further Growth at A. Eberle

Welcome to the team! We welcome our new colleagues at A. Eberle.

Read more

Specialist Training on Power Quality

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).

Read more

Visit from the Erlangen Technical School at A. Eberle

On 22 May 2025, A. Eberle welcomed two classes from the technical school of the city of Erlangen - true to the motto: From theory to practice.

Read more

Contact request:



* Mandatory

Your data is being processed

a-eberle kontakt newsletter ×

Our seminars &
webinars

► Register here!

x