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Impact of current load on mine trailing cable thermal life.

Authors
Yenchek-MR; Kovalchik-PG
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC 9278, 1991 Jan; :1-11
Link
NIOSHTIC No.
10008582
Abstract
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 (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. 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.
Keywords
Electrical-insulation; Electric-currents; Portable-equipment; Power-lines; Insulated-conductors; Load-impedance; Thermal-degradation; Loading; Mining-equipment; Service-life; Electric-wire
Publication Date
19910101
Document Type
IH; Information Circular
Fiscal Year
1991
NTIS Accession No.
PB92-177641
NTIS Price
A03
Identifying No.
IC-9278
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC 9278
State
PA
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