Title :
Out-of step and single phasing protection of synchronous chipper motors
Author :
Das, J.C. ; Steinmetz, Jon D. ; Engram, Clifton D. ; McPhee, Aaron A.
Author_Institution :
Power Syst. Studies, Inc., Snellville, GA, USA
Abstract :
Chipper motors in pulp and paper mill environment are of special design-the stability on impact loads is one important consideration. The power factor under normal operation will continuously swing due to varying loads. The paper describes guesswork free rigorous calculations of pull out (out-of-step) power factor based on the parameter of an actual installation. Single phasing is rather a rare occurrence; however, such an event has been experienced in an installation due to overheating and arcing at the fuse clips in a NEMA E2 starter of a chipper motor. Discussions on single phase protection of synchronous motors and recommended settings are provided.
Keywords :
arcs (electric); design engineering; milling; paper industry; power factor; synchronous motor protection; NEMA E2 starter; arcing; fuse clips; overheating; paper mill environment; pull out power factor; pulp mill environment; stability design; synchronous chipper motor out-of step protection; synchronous chipper motor single phasing protection; Reactive power; Reluctance motors; Shafts; Stability criteria; Thermal stability; Torque; Synchronous chipper motors; pull out protection through calculated power factor settings; single phasing protection;
Conference_Titel :
Pulp and Paper Industry Conference (PPIC), 2015 61st IEEE
Conference_Location :
Milwaukee, WI
Print_ISBN :
978-1-4799-7113-8
DOI :
10.1109/PPIC.2015.7165857
