Power node switching center

Details Power node switching center Power node switching center

2007-12-18

2010-02-23

Nguyen, Danny (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Feeder protection in distribution networks

C361S042000

Reexamination Certificate

active

07667938

ABSTRACT:
A circuit fault detector and interrupter which consists of parallel current conduction paths, including a path through a mechanical contactor and a path through a power electronics switch. A fault can be detected by a fault detection circuit within 50 microseconds of the occurrence of the fault, causing the mechanical contactor to be opened and the fault current to be commutated via a laminated, low-inductance bus through the power electronics switch. The power electronics switch is thereafter turned off as soon as possible, interrupting the fault current. The fault current can be interrupted within 200 microseconds of the occurrence of the fault, and the device reduces or eliminates arcing when the mechanical contactor is opened.

REFERENCES:
patent: 4025820 (1977-05-01), Penrod
patent: 5933304 (1999-08-01), Irissou
patent: 2008/0143462 (2008-06-01), Belisle et al.

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