Voltage dips are covered in four Application Notes, reflecting their economic importance. Introduction to Voltage Dips discusses the nature of voltage dips and their origins within the installation or, more likely, in the network. The sensitivity of equipment to voltage dips is discussed and compared with typical network performance. Voltage Dip Mitigation discusses the principal traditional mitigation measures. The discussion is continued in Considerations for choosing the appropriate voltage sag mitigation device in which some newer power electronic solutions are discussed, together with a methodology for selecting the most appropriate device. Finally, Voltage Sags in Continuous Processes describes a case study.
Voltage unbalance – often caused by unequal loading of the phases is discussed in Introduction to Unbalance. Unbalance can have a serious effect on the performance of three-phase equipment. This Application Note, Predictive Maintenance - The Key to Power Quality, proposes that, rather than simply responding to problems, PQ should be continuously monitored as part of a planned maintenance activity Flicker is the impression of unsteadiness of visual sensation induced by cyclic variation in the intensity or spectral content of a light source due to fluctuation of the supply voltage. It affects the concentration and productivity of people, but it does not have any effect on equipment.
Flicker introduces flicker and Flicker Measurement describes flicker-measurement in detail.
For an overview of each Application Note, please click on the title. To download, click  . |
