Thermal characteristics of energized coal mine trailing cables--

Journal Article · Fri Sep 01 04:00:00 EDT 1989 · IEEE Transactions on Industry Applications (Institute of Electrical and Electronics Engineers); (USA)

DOI:https://doi.org/10.1109/28.41244· OSTI ID:6916815

Yenchek, M R; Kovalchik, P G ^[1]

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1. Pittsburgh Research Center, Bureau of Mines, Pittsburgh PA (US)

The Bureau of Mines conducted research to determine the relationship between current load and temperature rises in coal mine trailing cables. Six low-voltage unshielded portable power cables were continuously and intermittently loaded with direct current of various magnitudes. Temperature rises within and on the cables were measured with thermocouples, and the data were recorded with a computer. Thermal time constants were calculated and fixed the periods of the duty cycle tests. Relationships between average temperature at the conductor/insulation interface and current load were established. The steady-state and intermittent currents that produce a 90{degrees}C average conductor/insulation temperature were then determined by mathematical modeling. Comparisons to Insulated Cable Engineers Association steady-state ratings reveal that 10-25 percent more current is required to reach rated insulation temperature. Examination of the maximum intermittent temperatures attained shows that auto-ignition of coal dust and burns to personnel handling the cable would not be concerns if the temperature at the conductor/insulation interface averaged 90{degrees}C.

• OSTI ID: 6916815
• Journal Information: IEEE Transactions on Industry Applications (Institute of Electrical and Electronics Engineers); (USA), Journal Name: IEEE Transactions on Industry Applications (Institute of Electrical and Electronics Engineers); (USA) Vol. 25:5; ISSN 0093-9994; ISSN ITIAC
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012034* -- Coal
Lignite
& Peat-- Underground Mining-- Automation
Monitoring
& Control-- (1987-)
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
CABLES
COAL MINES
CONDUCTOR DEVICES
DATA ACQUISITION SYSTEMS
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATION
EQUIPMENT
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MINES
MINING
NATIONAL ORGANIZATIONS
PEAK LOAD
PORTABLE EQUIPMENT
TEMPERATURE MEASUREMENT
THERMOCOUPLES
UNDERGROUND FACILITIES
UNDERGROUND MINING
US BUREAU OF MINES
US DOI
US ORGANIZATIONS