Title :
Understanding service factor, thermal models, and overloads
Author_Institution :
Schweitzer Eng. Lab., USA
Abstract :
Induction motors require thermal protection to prevent overheating to cyclic as well as steady state overloads. This paper discusses the problem that occurred while a customer was testing the motor relay that trip prematurely when subjected to cyclic loads that do not overheat the motor and the characteristic curves are analyzed.
Keywords :
induction motor protection; machine testing; relay protection; thermal analysis; induction motor; overheating prevention; relay testing; steady state overload; thermal model; thermal protection; Equations; Induction motors; Manufacturing; Protection; Protective relaying; Relays; Temperature; Testing; Thermal factors; Torque;
Conference_Titel :
Protective Relay Engineers, 2006. 59th Annual Conference for
Print_ISBN :
1-4244-0043-0
DOI :
10.1109/CPRE.2006.1638698
