Fault Indicator with permanent and temporary fault indication

Details Fault Indicator with permanent and temporary fault indication Fault Indicator with permanent and temporary fault indication

2006-04-04

2006-04-04

Chang, Yean-Hsi (Department: 2835)

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

C324S239000, C324S522000

Reexamination Certificate

active

07023691

ABSTRACT:
A fault indicator for indicating the occurrence of a fault in an electrical conductor has a housing, a high capacity battery, a permanent fault display for indicating the occurrence of a permanent fault, a temporary fault display for indicating the occurrence of a temporary fault, a current sensor for sensing the load current in a monitored conductor, a microcontroller for determining when a fault condition occurs and for activating the permanent or temporary fault displays. Preferably, each display includes one or more LEDs. Upon detecting a fault, the microcontroller begins flashing the permanent fault LEDs. After a predetermined interval, the microcontroller again senses the load current. If the current is zero, the fault is permanent and the permanent LEDs continue to flash until a timed reset occurs. If the load current is present, the fault is temporary and the temporary LED is flashed until the timed reset. A light sensor is used to detect nighttime conditions, and microcontroller supplies reduced power to the LEDs at that time. Power to the LEDs is supplied in a repetitive pattern consisting of pulses followed by off time. Related methods are also disclosed.

REFERENCES:
patent: 4063171 (1977-12-01), Schweitzer, Jr.
patent: 4234847 (1980-11-01), Schweitzer
patent: 4438403 (1984-03-01), Schweitzer, Jr.
patent: 4456873 (1984-06-01), Schweitzer, Jr.
patent: 4495489 (1985-01-01), Schweitzer, Jr.
patent: 4788619 (1988-11-01), Ott et al.
patent: 4904932 (1990-02-01), Schweitzer, Jr.
patent: 5677678 (1997-10-01), Schweitzer, Jr.
patent: 6016105 (2000-01-01), Schweitzer, Jr.
patent: 6133723 (2000-10-01), Feight
patent: 6133724 (2000-10-01), Schweitzer, et al.

Affiliated with

Also associated with

Rating

Fault Indicator with permanent and temporary fault indication does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fault Indicator with permanent and temporary fault indication, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fault Indicator with permanent and temporary fault indication will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3542490