Rapid voltage change (RVC) is one of the voltage disturbances classified under the term voltage quality and is included in several standards internationally but without a fully unique definition. This paper describes the Norwegian regulator's motive for introducing requirements for RVCs in the public electricity quality of supply regulation. Furthermore, a research project is described with focus on which rapid voltage changes that are visible in lighting. This project gave a sound basis for providing a unique definition on RVCs, and the definition is also presented. Finally, the paper describes the regulator minimum requirements for RVCs.

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