Behavior of Induction Motor Protection Due to Voltage Sags and Short Interruptions

Author

Gomez, J. C. ; Morcos, M. M. ; Reineri, C. A. ; Campetelli, G. N.

Author_Institution

National University of Rio Cuarto; Kansas State University

Volume

21

Issue

11

fYear

2001

Firstpage

62

Lastpage

62

Abstract

An experimental study and some calculations on induction motor behavior were carried out. The effects due to short interruptions and voltage sags were investigated. A standard three-phase squirrel-cage motor of 5.5 kW, 1500 rpm, 380 V was used. The presence of induction motor changes the voltage sag waveform and duration. Protection characteristic curves and contactor ride-through capability together with their improvement are also studied. The interaction between motor load, system hot-load pickup, and voltage sag magnitude determine the motor reacceleration duration and magnitudes. Besides, on-sag and post-sag currents can reach levels higher than the direct start values. Post-sag overcurrent duration can last more than twice the normal start time period, having specific energies in the same order of magnitude.

Keywords

Dielectrics and electrical insulation; Impulse testing; Induction motors; Insulation testing; Insulators; Power quality; Power system stability; Protection; Substations; Voltage fluctuations; Hot-load pickup; induction motor; motor reacceleration; power quality; short interruptions; voltage sags;

fLanguage

English

Journal_Title

Power Engineering Review, IEEE

Publisher

ieee

ISSN

0272-1724

Type

jour

DOI

10.1109/MPER.2001.4311184

Filename

4311184