IEC 61000-3-2(Edition 5.0) & IEC 61000-3-3(Edition 3.1) Standard
Electromagnetic Compatibility (EMC)- Part 3-2: Limits for harmonic current emissions Part 3-3: Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems
EMC Tests are tests that check the electromagnetic compatibility of a device or system. In the Electromagnetic Compatibility Test (EMC Test), it is aimed to operate any electrical and electronic device or system without being affected by and affecting other devices or systems in the environment. EMC Test is generally examined in two categories as Immune EMC Test and Emission EMC Test. Test limit values and test methods specified in the standards used in EMC Test applications may vary according to the features of the device or system.
IEC 61000-3-2 deals with the limitation of harmonic currents injected into the public supply system. It specifies limits of harmonic components of the input current which can be produced by equipment tested under specified conditions. It is applicable to electrical and electronic equipment having a rated input current up to and including 16 A per phase, and intended to be connected to public low-voltage distribution systems.
IEC 61000-3-3 is concerned with the limitation of voltage fluctuations and flicker impressed on the public low-voltage system. It specifies limits of voltage changes which may be produced by an equipment tested under specified conditions and gives guidance on methods of assessment. It is applicable to electrical and electronic equipment having an input current equal to or less than 16 A per phase, intended to be connected to public low-voltage distribution systems of between 220 V and 250 V line to neutral at 50 Hz, and not subject to conditional connection.
For the harmonic current emissions test, devices are examined in 4 categories and these are classes A, B, C and D. Devices not specified in Class B, C and D are examined in Class A.