Title :
Your dog didn´t eat your homework, and lightning didn´t kill that motor
Author :
Yung, Chuck ; Bryan, Jim
Author_Institution :
EASA, St. Louis, MO, USA
Abstract :
Countless times each year, lightning is wrongly blamed for electric motor failures. This paper addresses ways to differentiate between damage from lightning and that caused by inadequate ground fault protection or multiple start attempts after the initial failure. Transient conditions, rapid bus transfer, and ungrounded systems often mislead the repairer into blaming lightning for motor failures. A list of similar transients would have to include re-closure, improperly located power factor correction (PFC) capacitors, accidental connection of a new dual-voltage motor for the wrong voltage, and lightning.
Keywords :
electric motors; failure analysis; lightning; dual-voltage motor; electric motor failures; inadequate ground fault protection; lightning; power factor correction; rapid bus transfer; transient conditions; ungrounded systems; Lightning; Partial discharges; Surge protection; Transient analysis; Windings;
Conference_Titel :
Petroleum and Chemical Industry Conference (PCIC), 2011 Record of Conference Papers Industry Applications Society 58th Annual IEEE
Conference_Location :
Toronto, ON
Print_ISBN :
978-1-61284-299-8
DOI :
10.1109/PCICon.2011.6085881