Power distribution control system

Details Power distribution control system Power distribution control system

1974-07-15

1976-09-21

Miller, J. D.

317 50, H02H 300

Patent

active

039821587

ABSTRACT:
A system control arrangement for power distribution is disclosed in which a line current exceeding a predetermined threshold level is detected as a potential fault current and initiates comparison of the line current and a projected, simulated fault current in a time interval of less than 100 microseconds. The control system responds to a line current exceeding the threshold level to begin a control cycle by opening fast-acting breakers or, inline breakers that switch the current path to a crossed-field switch tube of a current limiting circuit and the control system responds to line current exceeding the simulated fault current over a time period of 1 millisecond to open the current path through the switch tube and thereby insert the current limiting impedance after the millisecond, monitoring time period.

REFERENCES:
patent: 3764851 (1973-10-01), Hicks et al.

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