EN 61000-3-3 Electromagnetic Compatibility (EMU) - Test Standard for Voltage Requirements for Devices with Rated Current up to 16 A per Phase and Not Subject to Conditional Connection

EN 61000-3-3 is concerned with limiting the voltage fluctuations and flicker affected in the general low voltage system. It specifies the limits of voltage changes that can be produced by equipment under certain conditions and provides guidance on evaluation methods.

This standard is applicable to electrical and electronic equipment with an input current of less than or equal to 16 A per phase, intended to be connected to public low-voltage distribution systems between 220 V and 250 V, and neutral to neutral at 50 Hz.

Equipment that, when tested with the reference impedance, does not conform to the limits of this part of EN 61000 and therefore cannot be declared as conforming to this part, may be retested or evaluated to demonstrate compliance with EN 61000-3-11. Section 3-11 applies to equipment with a rated input current <= 75 A per phase and subject to conditional connection.

The limits in this part of EN 61000 are mainly based on the subjective severity of flicker applied to light from 230 V/60 W helical coil filament lamps by supply voltage fluctuations. For systems with a rated voltage of 220 V from line to neutral or with a frequency of 60 Hz, the limits and reference circuit values ​​are taken into account.

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