The purpose of this thesis is to study the effectiveness of voltage sag mitigation on chiller controller equipment to comply SEMI F47 standards. The thesis adopts a comprehensive data measurement and analysis on voltage trend on selected dmation on chiller control circuit. SEMI F47 standards specification allow the voltage sag 50% within 0.3sec from the nominal voltage are acceptable range. All related data measurement were taken at a semiconductor company in Bayan Lepas Industrial Park, Penang. To achieve this, it is essential to properly select voltage sag device depending on working environment and
physical equipment. Allen Bradly Bulletin l608P ProDySC25 is capable for voltage sag mitigation, which contributes towards improvements on voltage stability if subjected to voltage sags. There are limitations ofthe voltage and current ranges given the restricted choice of equipment selection. This study provides in-depth knowledge on the importance and benefits of voltage sag mitigation, in its contribution to significant voltage quality with increasing total equipment efficiency to meet SEMI-F47 in business operations. This thesis is very original as on highly accurate voltage and duration trends measured on
actual performance of voltage sag device hooked-up on chiller controller equipment as real-time.
