Equipment sensitivity to voltage sags-test results for contactors, PCs and gas discharge lamps

Voltage sag tolerance levels were measured for samples of three equipment categories sensitive to sags: contactors, PCs and gas discharge lamps. An up-to-date voltage waveform generator was used to produce and repeat the events as necessary. Remaining voltage and sag duration were the test variables. For contactors also the effect of point-on-wave of sag initiation was studied. The results were rather well convergent with earlier studies by other institutes. This justifies more generalized conclusions on performance of these device categories as well as more statistical approach to the issue. This kind of typical equipment sensitivity data is needed as a library for the future sag assessment methods.