Electromagnetic Compatibility (EMC) - Part 3-11: Limits - Limitation of Voltage Changes, Voltage Fluctuations and Flicker in Public Low-Voltage Supply Systems - Equipment with rated current ≤ 75 A and subject to conditional connection

1 Scope and object

This part of IEC 61000 is concerned with the emission of voltage changes, voltage fluctuations

and flicker produced by equipment and impressed on the public low-voltage supply system.

It specifies the limits of voltage changes produced by equipment tested under specified

conditions.

This part of IEC 61000 is primarily applicable to electrical and electronic equipment having a

rated input current from 16 A up to and including 75 A, which is intended to be connected to

public low-voltage distribution systems having nominal system voltages of between 220 V and

250 V, line-to-neutral at 50 Hz, and which is subject to conditional connection.

This part of IEC 61000 is also applicable to equipment within the scope of IEC 61000-3-3 that

does not meet the limits when tested or evaluated with reference impedance Zref and is

therefore subject to conditional connection. Equipment which meets the requirements of

IEC 61000-3-3, is excluded from this part of IEC 61000.

Equipment tests made in accordance with this part of IEC 61000 are type tests.

NOTE The flicker limits specified in this part, being the same as those in IEC 61000-3-3, are based on the

subjective severity of the flicker imposed on the light from 230 V/60 W coiled-coil filament lamps when subjected to

fluctuations of the supply voltage. For systems with nominal voltages less than 220 V, line-to-neutral and/or

frequency of 60 Hz, the limits and reference circuit values are under consideration