About
Provides information from a NIOSH investigation on how the starting of induction motors may cause nuisance tripping of short-circuit protection on coal mine power systems.
Format: PDF
Language: English (US)
Size: 266 KB
Developed by: National Institute for Occupational Safety and Health
Suggested citation
NIOSH [1997]. Distinguishing motor starts from short circuits through phase-angle measurements. Pittsburgh, PA: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 97-120.
Content Source
National Institute for Occupational Safety and Health
About This Page
Published: June 22, 2026
Updated: August 8, 2023
This page was last updated on this date. Updates may include minor edits, image changes, or other modifications to page content.
Reviewed: August 8, 2023
The information on this page was last reviewed by subject matter experts to ensure accuracy.