GB/T 17626.30-2012

This part of GB/T 17626 specifies the measurement methods for power quality parameters in 50 Hz AC power supply systems and the interpretation of the measurement results.
The measurement methods for each relevant parameter are described using terms that provide reliable and reproducible results, but do not involve the implementation methods of the measurement methods. This part involves on-site measurement methods.
This part is applicable to the measurement of the specified parameters limited to voltage phenomena that can be processed in power systems. The power quality parameters covered in this part include grid frequency, supply voltage amplitude, flicker, supply voltage sags and swells, voltage interruptions, transient voltage, supply voltage imbalance, voltage harmonics and interharmonics, carrier signals in supply voltage, and rapid voltage changes. Depending on the measurement purpose, it may be necessary to measure all or some of the above parameters.