Through phase-angle measurements [induction motor starting safety]

Author

Yenchek, Michael R. ; Cawley, James C. ; Brautigam, Albert L. ; Peterson, Jeffrey Shawn

Author_Institution

Pittsburgh Res. Lab., Nat. Inst. for Occupational Safety & Health, Pittsburgh, PA, USA

Volume

4

fYear

2000

fDate

36800

Firstpage

2695

Abstract

The US National Institute for Occupational Safety and Health investigated how the starting of induction motors may cause nuisance tripping of short-circuit protection on coal mine power systems. This research had a dual purpose: (1) to identify how motor-start waveforms differ from those for short circuits; and (2) to devise a method to provide short-circuit protection without intentional time delays to account for motor starts. This technology will help ensure that surface temperatures of energized electrical apparatus will not exceed gas or dust ignition thresholds when short circuits occur

Keywords

explosions; induction motors; industrial power systems; machine testing; mining; overcurrent protection; phase measurement; power system faults; power system protection; safety; short-circuit currents; starting; National Institute for Occupational Safety and Health; USA; apparatus surface temperatures; coal mine power systems; dust ignition thresholds; gas ignition thresholds; induction motor starting; motor-start waveforms; nuisance tripping; short-circuit protection; through phase-angle measurements; time delays; Circuits; Delay effects; Health and safety; Ignition; Induction motors; Laboratories; Occupational safety; Phase measurement; Power system protection; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 2000. Conference Record of the 2000 IEEE

Conference_Location

Rome

ISSN

0197-2618

Print_ISBN

0-7803-6401-5

Type

conf

DOI

10.1109/IAS.2000.883204

Filename

883204