Inverse time-overcurrent relay using successive linear approxima

Details Inverse time-overcurrent relay using successive linear approxima Inverse time-overcurrent relay using successive linear approxima

1975-08-04

1977-04-12

Moose, Harry

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

307229, 328142, 361 3, H01H 4718

Patent

active

040177661

ABSTRACT:
The disclosure relates to a time-overcurrent relay utilizing successive linear time-current segments which approximate a non-linear, inverse time-current curve the linear segments are determined by subtracting a series of ramp like voltages of increasing magnitudes from a series of bias voltages, each of which is of substantially constant magnitude and which bias voltage magnitudes decrease in sequence by the peak magnitude of the preceding ramp voltage.

REFERENCES:
patent: 3079533 (1963-02-01), Kotheimer
patent: 3444434 (1969-05-01), Zocholl
patent: 3831061 (1974-08-01), Boyd

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