Adaptive transient blocking unit

Details Adaptive transient blocking unit Adaptive transient blocking unit

2011-07-12

2011-07-12

Fureman, Jared J (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

Reexamination Certificate

active

07978455

ABSTRACT:
A variable trip limit transient blocking unit (TBU) is provided. The variable trip limit transient blocking unit circuit includes a transient blocking unit and a low-pass filter, such as an RC circuit having an RC time constant. The RC circuit is disposed to approximate an integrator operating over periods of time that are short compared to the RC time constant. The RC circuit integrates a signal representing an approximated current flowing through the transient blocking unit and triggers a disconnect threshold in the transient blocking unit when a voltage stored across a capacitor of the RC circuit reaches a predefined limit.

REFERENCES:
patent: 4744369 (1988-05-01), Kroll
patent: 2006/0285264 (2006-12-01), Harris
patent: 2007/0035906 (2007-02-01), Harris et al.

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