Sensitivity of electrical equipment to voltage sags and short interruptions: recommendations for testing

General testing procedures for testing different types of electrical equipment against various types of voltage sags and short interruptions are proposed and described in this paper. The recommendations for testing are discussed with respect to a number of sag and interruption parameters, non-ideal voltage supply characteristics, type of equipment, operating/loading conditions of the equipment and multiplicity of the malfunction criteria of the equipment. Presented analysis is illustrated using the examples of equipment sensitivity identified in tests.