Feasibility Study of the Use of Current Limiting Devices in Interruption and Sectionalizing the DC Circuits in Mines.
NTIS: PB/256-541 Available for Reference At Bureau Libraries :150 pages
The objective of this study was to determine the feasibility of using current limiting devices (cld) in switching heavy DC currents (1,200 and 600 amperes) at utilization voltages used in the mining industry (300 and 600 volts, nominal). Use of a cld in this application is based on its orders of magnitude change in resistance when it changes state (from liquid mercury to vapor) after being subjected to short-time, high-density current. Switching times on the order of 3 to 4 milliseconds have been obtained.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB/256-541 Available for Reference At Bureau Libraries
University of Pittsburgh