The Impact of Current Load on Mine-trailing Cable Service Life.
10th WVU Int'l Mng Electrotech Conf Morgantown West Virginia, 7/24-27/90 West Virginia Univ PP 17-22 :17-22
The U.S. Bureau of Mines has determined how coal mine portable power cable service life is related to electrical loading. This work was the culmination of a multifaceted research project involving (1) accelerated life tests of insulation and jacket materials and (2) steady-state and cyclical loading of cables. Composite arrhenius curves were derived for common insulation and jacket materials to identify the key cable quality that precipitates thermal failure. Plots of temperature rise versus current for popular cable sizes were then referenced to develop a correspondence between cable life, based upon thermal degradation, and current loading. Through integration over variable load cycles, and consequently variable operating temperatures, predictions of cable thermal life were made. This procedure should have utility for both the Mine Safety and Health Administration and mining machine designers in determining the appropriate cable size for new equipment.
10th WVU Int'l Mng. Electrotech. Conf., Morgantown, West Virginia, 7/24-27/90. West Virginia Univ., PP. 17-22