Blogs for the expansion of PQ expertise as well as for general information on the topic of network quality.
Problem Risks for electrical equipment in installations are often only noticed by listening carefully. This is also the case here, although it is not uncommon in the metalworking industry. The cause of the extreme voltage distortions shown above in a broad frequency spectrum up to slightly above 20 kHz are powerful converters in the presses. […]
Problem: Potential equalisation currents Potential equalisation currents, often referred to as vagrant currents, are not only a problem in industrial plants. Currents can also have a disruptive effect on equipotential bonding in commercial and even residential buildings. Cause: Leakage currents frequency inverter The picture shows the cause of an annoying whistling in the speakers of […]
Power blackout in Germany? A warm welcome, dear friends of protection, control and electrical engineering. What actually happens during a power blackout and is that even possible in Germany? Marc Elsberg showed us a terribly realistic scenario in his book ” Blackout“. A large-scale and prolonged power blackout would have relevant consequences for our society. […]
Innovative and informative website on the topic of power quality The topic of power quality is rapidly gaining importance in the context of the energy transition and smart grids and smart metering. As a result, the question marks of the supposedly affected and involved parties are piling up to the same extent. What does this […]
Incorrect wiring of an inverter causes problems Problem description Immediately after commissioning an inverter-driven CHP unit, several bus systems failed in the customer’s system. M-Bus, Profibus and Modbus modules were affected. As a result of the bus malfunctions, there were constant error messages and false alarms in the process control and thus also failures of […]