Title :
Effect of system recovery on the induction motor protection using HBC fuses, following a short-circuit fault
Author :
Tourn, D.H. ; Gomez, J.C.
Author_Institution :
Power Syst. Protection Inst., Rio Cuarto Nat. Univ., Cordoba, Argentina
Abstract :
Electric system recovery after a deep voltage sag or short interruption produces a particular stress on the HBC (or cl) fuses protecting induction motors. The phenomenon is different from the hot-load pickup due to the large kinetic energy and EMF reductions of the pre-connected motors. After this instant the whole system demands extra energy, which stresses both the motor fuses and motor windings. The maximum value is higher than the direct start specific energy, which can produce the motor overload protection trip or the start of fuse aging process. It is concluded the need of taking into account the re-acceleration effect on the motor protection.
Keywords :
electric fuses; induction motor protection; machine testing; machine windings; power system faults; power system protection; power system transients; short-circuit currents; EMF reductions; HBC fuses; deep voltage sag; fuse aging process; induction motor protection; kinetic energy reductions; motor fuses; motor overload protection trip; motor windings; short interruption; short-circuit fault; Aging; Circuit faults; Fuses; Induction motors; Kinetic energy; Power quality; Power system protection; Stress; System recovery; Voltage fluctuations;
Conference_Titel :
Industry Applications Conference, 2001. Thirty-Sixth IAS Annual Meeting. Conference Record of the 2001 IEEE
Conference_Location :
Chicago, IL, USA
Print_ISBN :
0-7803-7114-3
DOI :
10.1109/IAS.2001.955781
