Distinguishing motor starts from short circuits through phase-angle measurements

被引：4
|
作者：
Yenchek, MR [1 ]
Cawley, JC
Brautigam, AL
Peterson, JS
机构：
[1] NIOSH, Min Injury Prevent Branch, Pittsburgh Res Lab, Pittsburgh, PA 15236 USA
[2] NIOSH, Hearing Loss Prevent Branch, Pittsburgh Res Lab, Pittsburgh, PA 15236 USA
来源：
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS | 2002年 / 38卷 / 01期
关键词：
Longwalls; mining; motor; phase angle; short circuit;
D O I：
10.1109/28.980376
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The 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.
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页码：195 / 202
页数：8
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