What to Know Before Measuring Power Quality
What are Digital Residual Current Devices
Before performing power quality work in electrical maintenance, especially when working with special machines, talking to the equipment operator generally allows you to gain insight into the cause of possible or existing problems. At the same time, a log containing all information, including the date and time of occurrence, is very useful for comparing all the data obtained from power quality measurements.
Unlike the relays currently on the market, Frer residual current devices are never affected by harmonic and noise currents. At this point, two different currents can be seen on the screen, the first being the actual leakage current and the second being the harmonic current. Accordingly, tripping is done according to the actual current, and it also has low-pass filter properties.
