Overcurrent protection device

Details Overcurrent protection device Overcurrent protection device

1989-12-27

1992-12-08

DeBoer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 79, 361 87, H02H 308

Patent

active

051703114

ABSTRACT:
An overcurrent protection device is provided for one or more phases of a circuit that generates a control signal dependent upon an adjustable trip level setting after a fault has occurred. The device includes a blocking level detector that blocks the generation of the control signal is the current in any of the phases exceeds either a first predetermined blocking level or the adjustable trip level setting. In a preferred arrangement, before control-signal generation, the device also requires that the current in at least one phase is below a predetermined load level.

REFERENCES:
patent: 4445183 (1984-04-01), McCollum et al.

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