IEC 61000-3-2:2020 ELECTROMAGNETIC COMPATIBILITY (EMC) – Part 3-2: Limits – Limits for harmonic current emissions (equipment input current ≤ 16 A per phase).
4 General
The objective of this document is to set limits for harmonic emissions of equipment within its scope, so that, with due allowance for the emissions from other equipment, compliance with the limits ensures that harmonic disturbance levels do not exceed the compatibility levels defined in IEC 61 000-2-2.
Professional equipment that does not comply with the requirements of this document can be permitted to be connected to certain types of low voltage supplies, if the instruction manual contains a requirement to ask the supply utility for permission to connect. Recommendations concerning this aspect are contained in IEC 61 000-3-1 2.
5 Classification of equipment
5.1 General
For the purpose of harmonic current limitation, equipment is classified as follows:
Class A:
Equipment not specified as belonging to Class B, C or D shall be considered as Class A equipment.
Some examples of Class A equipment are:
– balanced three-phase equipment;
– household appliances, excluding those specified as belonging to Class B, C or D;
– vacuum cleaners;
– high pressure cleaners;
– tools, excluding portable tools;
– independent phase control dimmers;
– audio equipment;
– professional luminaires for stage lighting and studios.
NOTE 1 Equipment that can be shown to have a significant effect on the supply system might be reclassified in a future edition of this document, taking into account the following factors:
– number of pieces of equipment in use;
– duration of use;
– simultaneity of use;
– power consumption;
– harmonic spectrum, including phase.
Class B:
– portable tools;
– arc welding equipment which is not professional equipment.
Class C:
– lighting equipment.
Class D:
Equipment having a specified power less than or equal to 600 W according to 6.3.2, of the following types:
– personal computers and personal computer monitors;
– television receivers;
– refrigerators and freezers having one or more variable-speed drives to control compressor motor(s).
NOTE 2 Class D limits are reserved for equipment that, by virtue of the factors listed in note 1 , can be shown to
have a pronounced effect on the public electricity supply system.
5.2 Description of lighting equipment
In this document, lighting equipment as defined in 3.1 3 includes:
– light sources, lamps, integrated lamps and luminaires;
– the lighting part of multi-function equipment where one of the primary functions of this is illumination;
– independent lighting control gear;
– ultraviolet (UV) and infrared (IR) radiation equipment;
– illuminated advertising signs;
– independent dimmers, other than phase control types, for lighting equipment;
– DLT control devices.
In this document, lighting equipment as defined in 3.1 3 excludes:
– lighting devices built in equipment with another primary purpose, such as photocopiers, overhead projectors and slide projectors, or employed for scale illumination or indication purposes;
– household appliances whose primary function is not for generating and/or regulating and/or distributing optical radiation but which contain one or more light sources with or without a separate switch (e.g. a range hood with a built-in light source);
– independent phase control dimmers;
– professional luminaires for stage lighting and studios;
– emergency luminaires that emit light only during emergency mode;
– professional appliances whose primary function is to present lighting devices for exhibition purposes;
– mechanical switches and relays, and other simple devices providing on/off control only, that do not produce distorted currents.IEC 61000-3-2 pdf download.