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The Feasibility of Low Current Fault Detection by Differential Current Measurement.

Authors
Perron-RP; Ginty-JJ; Lagace-RL; Spencer-RH
Source
NTIS: PB 250 599 Available for Reference At Bureau Libraries :68 pages
Link
NIOSHTIC No.
10001206
Abstract
This report reviews various means for trolley line fault detection in coal mines and identifies some of the problems and limitations of these means. It then describes a new approach for fault detection based on the detection of current differences between feeder and load currents. Means are described for measuring feeder and load currents to a precision of about 1/2 percent, comparing these currents in real time and tripping feeder circuit breakers when the currents do not essentially balance. Motive load currents are telemetered back to current comparing points via radio links.
Publication Date
19740101
Document Type
CP; Final Contract Report;
Fiscal Year
1974
NTIS Accession No.
PB-250599
NTIS Price
A05
Identifying No.
OFR 38-76
NIOSH Division
PRC;
Source Name
NTIS: PB 250 599 Available for Reference At Bureau Libraries
Performing Organization
A. D. Little, Inc.
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