Impact of current load on mine trailing cable thermal life

Technical Report · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5794028

This paper reports that the U.S. Bureau of Mines has determined a method for calculating coal mine portable power cable thermal life for a specified temperature loading. This work was the culmination of a multifaceted research project involving accelerated life tests of insulation and jacket materials and 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. Predictions of cable thermal life were made through integration over variable load cycles and, consequently, variable operating temperatures. This procedure may have utility for both the U.S. Mine Safety and Health Administration and mining machine designers in determining the appropriate cable size for new equipment.

• Research Organization: Bureau of Mines, Pittsburgh, PA (United States)
• OSTI ID: 5794028
• Report Number(s): IC-9278
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012032* -- Coal
Lignite
& Peat-- Underground Mining-- Transport & Services-- (1987-)
016000 -- Coal
Lignite
& Peat-- Health & Safety
24 POWER TRANSMISSION AND DISTRIBUTION
240301 -- Power Transmission Lines & Cables-- Power Cables-- (1990-)
CABLES
COAL MINES
CONDUCTOR DEVICES
DESIGN
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
EQUIPMENT
JACKETS
MINES
MINING EQUIPMENT
NATIONAL ORGANIZATIONS
RESEARCH PROGRAMS
SAFETY
SERVICE LIFE
THERMAL DEGRADATION
THERMAL INSULATION
UNDERGROUND FACILITIES
US BUREAU OF MINES
US DOI
US ORGANIZATIONS