– Voltage and current harmonics
– Voltage unbalance
– Rapid voltage changes
– Voltage Sags and Dips
Fast transient voltage and current measurements are performed with high-tech portable equipment (Rogowsky current transducers, voltage transducers based on electrical field sensing technology, high band pass instruments, high speed data acquisition, etc.).
Monitoring can be performed for long periods of time at remote plants, e.g.windmills.
Power quality and transient measurements often help to identify equipment misoperations and are used for root cause failure analysis.