Second edition of BAS EN 62586-1: 2018, Power quality measurement in power supply systems - Part 1: Power quality instruments (PQI), was adopted by translation method through the Technical Committee BAS/TC 10, Electrical energy measurment equipment and load control.

Electricity as delivered to the network users has several characteristics which are variable and which affect its usefulness to the network user.

Power quality instruments on the market have different characteristics. This standard provides a common system of references in order to facilitate their selection, comparison and evaluation. This standard specifies a classification based on product performances, environment and safety. This part of IEC 62586 specifies product and performance requirements for instruments whose functions include measuring, recording and possibly monitoring power quality parameters in power supply systems, and whose measuring methods (class A or class S) are defined in IEC 61000-4-30.