Schneider Electric Blog (19/12/2018)
Selecting an power quality instrument (PQI) for today’s distributed energy resources
… To do this, one needs a tool known as a Power Quality Instrument (PQI), but not all power metering devices are created equal – read “Power Quality Instruments (PQI): An Overview,” which describes some new International Electrotechnical Commission (IEC) standards that help electrical contractors and specifiers choose an appropriate PQI.
… For example, the international power quality monitoring standard IEC 61000-4-30 was first published back in 2003 and has seen a few revisions since then.
… As a remedy, the IEC recently created the two-part IEC 62586 series of standards. Part 1 (IEC 62586-1) defines a comprehensive PQ device product standard, known as PQIs.
… Part 2 (IEC 62586-2) defines the functional tests, procedures, and conformance levels intended to verify compliance with the PQ measurement methods specified in the 4-30 standard.