Asymmetric fault detection and protection with AC solid...

Details Asymmetric fault detection and protection with AC solid... Asymmetric fault detection and protection with AC solid...

2006-12-26

2010-02-02

Jackson, Stephen W (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

Reexamination Certificate

active

07656633

ABSTRACT:
An apparatus and method for protecting an AC load from half-wave rectified power detects a half-wave rectified voltage or current, sets a status indication indicating the type of asymmetric fault causing the half-wave rectified power, and selectively turns the SSPC ON or OFF depending on the type of fault. There are two example circumstances that can cause an asymmetric fault: when the SSPC is OFF and a switch is shorted (“SSPC Failed Shorted”), or when the SSPC is commanded ON and a switch remains open (“SSPC Failed Open”). If the SSPC is OFF when the half-wave rectified AC voltage or current is detected, an “SSPC Failed Shorted” status indication is set, and the SSPC is turned ON to clear the fault. If the SSPC is commanded ON when the half-wave rectified AC voltage or current is detected, an “SSPC Failed Open” status indication is set, and the SSPC is turned OFF to clear the fault.

REFERENCES:
patent: 4203040 (1980-05-01), Abbondanti et al.
patent: 4429339 (1984-01-01), Jaeschke et al.
patent: 5100821 (1992-03-01), Fay
patent: 5831807 (1998-11-01), Masannek et al.
patent: 5892677 (1999-04-01), Chang
patent: 6501196 (2002-12-01), Lo
patent: 6995995 (2006-02-01), Zeng et al.
patent: 2007/0085135 (2007-04-01), Tanaka
patent: 10014641 (2001-10-01), None
patent: 0927981 (1999-07-01), None
European Search Report dated Jun. 5, 2008.

Affiliated with

Also associated with

Rating

Asymmetric fault detection and protection with AC solid... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Asymmetric fault detection and protection with AC solid..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Asymmetric fault detection and protection with AC solid... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4196013