1 Scope
This document, which is a Technical Specification, specifies the expected characteristics of electricity at the point of supply of public low, medium and high voltage, 50 Hz or 60 Hz, networks, as well as power quality assessment methods.
This document does not apply for systems operated above 230 kV.
The boundaries between the various voltage levels can be different for different countries or regions. In the context of this document, the following terms for system voltage are used:
low voltage (LV) refers to UN ≤ 1 kV;
medium voltage (MV) refers to 1 kV < UN ≤ 35 kV;
high voltage (HV) refers to 35 kV < UN ≤ 230 kV.
Because of existing network structures, in some countries or regions, the boundary between medium and high voltage can be different. This document applies to the phenomena listed in Table 1.
NOTE 1 Specification of related measurement methods can be found in IEC 61000‑4‑30.
NOTE 2 Specification of the performance of related measuring instruments can be found in the IEC 62586 series.
NOTE 3 For information on power quality phenomena at low voltage direct current (LVDC) network, refer to IEC TR 63282.
While power quality is related to EMC in a number of ways, especially because compliance with power quality requirements depends on the control of cumulative effect of electromagnetic emission from all or multiple equipment and installations, this document is not an EMC publication (see also Annex E).