Electricity: electrical systems and devices – Safety and protection of systems and devices – Load shunting by fault responsive means
Patent
1989-09-15
1991-08-06
DeBoer, Todd E.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Load shunting by fault responsive means
361 58, 361111, 361127, H02H 904
Patent
active
050382454
ABSTRACT:
A method and apparatus for suppressing electrical transient signals, occurring on power lines, includes a clamping circuit for switching from a high impedance to a low impedance at a certain switching voltage, to suppress the transient signals. A first blocking circuit inhibits the clamping circuit from switching to maintain it at its high impedance during normal line voltage, and permits the clamping circuit to switch to its low impedance for clamping purposes responsive to an initial portion of a transient signal for initial suppression purposes. A second blocking circuit has a second low impedance, which is substantially lower than said first low impedance of the first blocking circuit, for inhibiting substantially the first blocking circuit from continuing to dissipate the transient signal following the initial time period, and for permitting the clamping circuit to suppress the transient signal following the initial time period. When coupled to a three conductor power line, unidirectional devices are employed to couple transient signals from any one of the three conductors of the power line, to the clamping circuit.
REFERENCES:
patent: 4023071 (1977-05-01), Fussell
patent: 4323942 (1982-04-01), Hartman et al.
patent: 4870528 (1989-09-01), Harford
Deboer Todd E.
Kleinke Bernard L.
Potts Jerry R.
Waters William P.
LandOfFree
Method and apparatus for suppressing electrical transients does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for suppressing electrical transients, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for suppressing electrical transients will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1991286