1. Understanding Power Quality Problems: Voltage Sags and Interruptions;Bollen,2000
2. Electrical Power Systems Quality;Dugan,2002
3. C4.110, Voltage dip immunity of equipment and installations;CIGRE/CIRED/UIE Joint Working Group;CIGRE Tech. Broch.,2010
4. Estimation of cost of downtime of industrial process due to voltage sags;Vegunta;IEEE Trans. Power Deliv.,2011
5. National and International Regulations and Standards About Power Quality;FAU,2014