EN 50160: Characteristics of the voltage (PQ) in public electricity supply networks.
D-A-CH-CZ: Technical regulations for the evaluation of grid distortion effects in Germany, Austria, Switzerland and the Czech Republic.
TOR D2: Technical and organisational regulations for operators and users of electrical networks, Part D: Special technical regulations; section D2: Directives for the evaluation of grid distortion effects.
IEEE 519: (Recommended Practices and Requirements for Harmonics Control in Electrical Power Systems) as a common recommendation from energy suppliers and operators for limiting the effects of non-linear loads through the reduction of harmonics.
ENGINEERING RECOMMENDATION: G5/4-1 (planning levels for harmonic voltage distortion to be used in the process for the connection of non-linear equipment) as a directive of the Energy Networks Association (UK) for limiting the effects of non-linear loads through the reduction of harmonics at the transition point (PCC). Valid in Great Britain and Hong Kong
ITIC (CBEMA): The ITI curve of the Information Technology Industry Council (ITI) represents the withstand capability of computers / power supplies in relation to the height and duration of voltage variations.
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