The European Standard EN 50 006, "The Limitation of Disturbances in
Electricity Supply Networks Caused by Domestic and Similar Appliances Equipped
with Electronic Devices," was completed by CENELEC (European Committee for
Electrotechnical Standardization) in 1975 and has been adopted as a national
standard by 14 European countries (Reference 12). The background of the standard
and an analysis is given in Reference 5.
The standard applies to home appliances equipped with solid-state switching
circuits that are operated on the low-voltage side of the public power systems.
It does not yet apply to television sets.
The appliances are tested in a standard three-phase, four-wire circuit that
has an impedance of 0.24 + j0.15 ohms in each of the three phases and 0.16 +
j0.10 ohms in the neutral. The maximum permissible generated voltage harmonics
per appliance in the circuit are:
|Oreder Number of Voltage Harmonic||Maximum Permissible Value (%)|
The conclusions of Reference 12 are that the regulations imposed by European
Standard EN 50 006 are sufficient as long as the total number of harmonic
generators in the supply system is low, but are not sufficient for a large
number of harmonic generators operated simultaneously on the power system.