Abstract
Since 1970 at least 12 men have died from underground coal mine fires which were started due to undetected high-resistance dc faults on trolley systems. A technique is proposed which utilizes Newton's method to solve the nonlinear equations which determine such fault currents. The formulation is unique in that it is the first known method to account for dc fault current contributions from both rectifiers and dc motors. Results from the technique can be used to size and coordinate devices used for system protection. The problems of accurately predicting such fault currents is discussed. A sample problem is included as an example.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
