Electromagnetic compatibility testing in EMC lab EN 61000−3−2
EN 61000-3-2:2014 Electromagnetic compatibility (EMC) — Part 3 – 2: Limits — Limits for harmonic current emissions (equipment input current ≤16 A per phase)
IEC 61000 – 3-2:2014
Reference of superseded standard:
EN 61000 – 3-2:2006 +A1:2006 +A2:2009 (Date expired (01÷07÷2012))
The new (or amended) standard has the same scope as the superseded standard. On the date stated, the superseded standard ceases to give presumption of conformity with the essential or other requirements of the relevant Union legislation.
International standard EN 61000-3-2:2014 is applicable for electrical equipment that is supplied from mains network with voltage not less than 220V and current up to 16A (including) to limit the harmonic component emission.
From the scope of this standard the following equipment are excluded:
- Equipment with rated power less than 75W, except class C equipment
- Professional equipment with power >1kW
- Symmetrically controlled heating elements with power ≤200W
- Independent dimmers for incandescent luminaries with power ≤1kW
International standard EN 61000-3-2:2014 have classification of equipment it covers:
• Three phase equipment
• Household appliances, except class D equipment
• Stationary, fixed tools
• Dimming equipment intended to be combined with incandescent lamps
• Audio equipment
• Other equipment that is not classified as class B, class C or class D
• portable tools
• non-professional arc welding equipment
• lighting equipment
Following type equipment with power less than 600W (including):
• Personal computers and similar
• Television receivers
• Refrigerators and freezers that are equipped with variable speed drives
Class A– frequency converters, cooking appliances, fixed woodworking equipment, lighting dimmers, audio amplifiers, subwoofers, heaters with regulation.
Class B– drills, electrical hammers, portable mining equipment, non-professional arc welding equipment.
Class C– LED lighting, LED street lighting and other lighting equipment.
Class D– Personal computers, tablets, laptops, TV, refrigerators.
Conducted emission requirements covered by this standard are up to 40th harmonic.
|Harmonic order||Current limit|
|Class A||Class B||Class C||Class D|
|Expressed as percentage of the input current at the fundamental frequency
|Permissible current per watt
|Permissible harmonic current
All limit values expressed with precision 0.01
λ — power factor of the circuit.
Forbidden control methods
Standard EN 61000 – 3-2:2014 defines control methods that are not allowed to be used in devices that are directly connected to the mains network:
• Asymmetrical controls according to IEC 600050 – 161, 161−07−12
• Half wave rectification
• Only practical solution permitting the detection of unsafe conditions
• Active input power <100W
• Portable equipment connected to mains network using two-core flexible cord and is used for short periods (< few minutes)
If one of the exceptions is fulfilled, half wave rectification can be used for any device. If one of the exceptions is fulfilled, asymmetrical controls according to IEC 600050 – 161, 161−07−12 can be used for motor control only.
Symmetrical control methods are allowed to use for heating elements supply, if active heating element power <200W or D class limits are fulfilled.
Symmetrical control methods are allowed for professional equipment if:
• Active heating element power <200W
• D class limits are fulfilled
• Temperature of heater should be regulated with time constant less than 2s
• No other technologies available