Sensitive ground-fault protection for mines. Phase 3. Coordination-free gfr's (ground-fault relays) for ac distribution. Open file report, 8 July 1986-7 April 1988 (Final)

Technical Report · Wed Jun 01 00:00:00 EDT 1988

OSTI ID:6434549

Trutt, F C; Kohler, J L; Rotithor, H; Morley, L A; Novak, T

The final report for Phase 3 of Bureau of Mines Contract concerns the research and development of a coordination-free relay for ground-fault protection in mine power distribution systems. The dynamic nature of distribution systems used in coal mines makes it difficult to maintain coordination of the ground-fault relays. Excessive clearing times under fault conditions are a direct result of poorly coordinated systems. This results in an increased risk of fire or electric shock. One result of the project is the development and demonstration of a technology which will eliminate the need to coordinate serial ground-fault relays while insuring that any ground fault is cleared in a minimum amount of time.

• Research Organization: Pennsylvania State Univ., University Park (USA). Dept. of Mineral Engineering
• OSTI ID: 6434549
• Report Number(s): PB-89-143382/XAB
• Resource Relation: Other Information: See also Phase 2, PB--87-203410
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL MINES
POWER DISTRIBUTION SYSTEMS
ELECTRIC GROUNDS
ELECTRICAL FAULTS
POWER TRANSMISSION LINES
FIRES
MINING
PROGRESS REPORT
DOCUMENT TYPES
MINES
UNDERGROUND FACILITIES
016000* - Coal
Lignite
& Peat- Health & Safety