IEC 61000-3-2
 | This article may be confusing or unclear to readers. (March 2014) |
IEC 61000-3-2 "Electromagnetic compatibility (EMC) - Part 3-2: Limits - Limits for harmonic current emissions (equipment input current ≤ 16 A per phase)" is an international standard concerning the harmonics emitted by electric equipment.
The analog European standard is called EN 61000-3-2 EN61000-3-2.
Scope
International standard IEC 61000 – 3-2:2006 +A1+A2 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 >1 kW
- Symmetrically controlled heating elements with power ≤200W
- Independent dimmers for incandescent luminaries with power ≤1 kW
EN 61000‒3‒2:2006+A1+A2 Electromagnetic compatibility (EMC) — Part 3 – 2: Limits — Limits for harmonic current emissions (equipment input current ≤16 A per phase)
Classification
International standard EN 61000‒3‒2:2006 +A1+A2 have classification of equipment it covers:
Class A:
• 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
Class B:
• portable tools
• non-professional arc welding equipment
Class C:
• lighting equipment
Class D:
Following type equipment with power less than 600W (including):
• Personal computers and similar
• Television receivers
Examples
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.
Requirements
Conducted emission requirements covered by this standard are up to 40th harmonic.
Limit lines
| Harmonic order | Current limit | ||||
| Class A | Class B | Class C | Class D | ||
| n | [A] | [A] | Expressed as percentage of the input current at the fundamental frequency
[%] |
Permissible current per watt
[mA/W] |
Permissible harmonic current
[A] |
| 2 | 1.08 | 1,62 | 2 | – | – |
| 3 | 2.3 | 3,45 | 30*λ | 3.4 | 2.3 |
| 4 | 0.43 | 0,64 | – | – | – |
| 5 | 1.14 | 1,71 | 10 | 1.9 | 1.14 |
| 6 | 0.3 | 0,45 | – | – | – |
| 7 | 0.77 | 1,15 | 7 | 1 | 0.77 |
| 8 | 0.23 | 0,34 | – | – | – |
| 9 | 0.4 | 0,60 | 5 | 0.5 | 0.4 |
| 10 | 0.18 | 0,27 | – | – | – |
| 11 | 0.33 | 0,49 | 3 | 0.35 | 0.33 |
| 12 | 0.15 | 0,22 | – | – | – |
| 13 | 0.21 | 0,31 | 3 | 0,29 | 0.21 |
| 14 | 0,13 | 0,19 | – | – | – |
| 15 | 0.15 | 0,22 | 3 | 0.25 | 0.15 |
| 16 | 0.11 | 0,16 | – | – | – |
| 17 | 0.13 | 0,19 | 3 | 0.22 | 0.13 |
| 18 | 0.1 | 0,15 | – | – | – |
| 19 | 0.11 | 0,16 | 3 | 0.2 | 0.11 |
| 20 | 0.09 | 0,13 | – | – | – |
| 21 | 0.1 | 0,15 | 3 | 0.18 | 0.1 |
| 22 | 0.08 | 0,12 | – | – | – |
| 23 | 0.09 | 0,13 | 3 | 0.16 | 0.09 |
| 24 | 0.07 | 0,10 | – | – | – |
| 25 | 0.09 | 0,13 | 3 | 0.15 | 0.09 |
| 26 | 0.07 | 0,10 | – | – | – |
| 27 | 0.08 | 0,12 | 3 | 0.14 | 0.08 |
| 28 | 0.06 | 0,09 | – | – | – |
| 29 | 0.07 | 0,10 | 3 | 0.13 | 0.07 |
| 30 | 0.06 | 0,09 | – | – | – |
| 31 | 0.07 | 0,10 | 3 | 0.12 | 0.07 |
| 32 | 0.05 | 0,07 | – | – | – |
| 33 | 0.06 | 0,09 | 3 | 0.11 | 0.06 |
| 34 | 0.05 | 0,07 | – | – | – |
| 35 | 0.06 | 0,09 | 3 | 0.11 | 0.06 |
| 36 | 0.05 | 0,07 | – | – | – |
| 37 | 0.06 | 0,09 | 3 | 0.1 | 0.06 |
| 38 | 0.04 | 0,06 | – | – | – |
| 39 | 0.05 | 0,07 | 3 | 0.09 | 0.05 |
| 40 | 0.04 | 0,06 | – | – | |
All limit values expressed with precision 0.01
λ — power factor of the circuit.
Goals
Standards on Low-Frequency Emission: IEC 61000-3-2
Goal: Limitation of harmonic components of the input current impressed on the public low-voltage supply system, for equipment
with input current ≤ 16 A per phase
• Equipment to be connected to 220/380 V, 230/400 V and 240/415 V systems operating at 50 Hz or 60 Hz
• No limits for systems with nominal voltage less than 220 V (line-to-neutral)
• Four categories of equipment
• Absolute and/or relative limits (relative limits based on input power)
Classification
International standard IEC 61000 – 3-2:2006 +A1+A2 have classification of equipment it covers:
Class A
- 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
Class B
- portable tools
- non-professional arc welding equipment
Class C
- lighting equipment
Class D
Following type equipment with power less than 600W (including):
- Personal computers and similar
- Television receivers