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
·
OSTI ID:6434549
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
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