Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1975-06-10
1977-01-11
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324DIG1, 340255, G01R 3102
Patent
active
040029689
ABSTRACT:
Techniques are disclosed for detecting and responding to a ground fault on either side of a two wire filtered, or unfiltered, power supply. A first voltage divider is bridged across the lines of the power supply and an intermediate point is grounded. A second voltage divider is bridged across the lines and two intermediate junctions provided. First and second voltage responsive means are coupled from ground to the first and second junctions of said second voltage divider, respectively, for comparing the potentials between the coupled points and providing an alarm in response to a variation indicative of a ground fault on either line below a predetermined threshold impedance. Filtering may be used to reduce the sensitivity of the system to noise or extraneous signals on the line. The sensitivity of the entire system and/or either line to ground may be adjusted by changing the relative values of the elements of the voltage dividers. The elements of the voltage dividers may be compared with the arms of a variation of the Wheatstone bridge.
REFERENCES:
patent: 1931054 (1933-10-01), Butterfield
patent: 2131386 (1938-09-01), Mishelevich
patent: 2362562 (1944-11-01), Kelly
patent: 2448461 (1948-08-01), Postal
patent: 2623107 (1952-12-01), Baughman
patent: 2648819 (1953-08-01), Gustafsson
patent: 2891218 (1959-06-01), Werts
patent: 2934699 (1960-04-01), Offner
patent: 2958823 (1960-11-01), Rabier
patent: 2999231 (1961-09-01), Kusters et al.
patent: 3066284 (1962-11-01), McKinley et al.
patent: 3377552 (1968-04-01), Baum
patent: 3569826 (1971-03-01), Burnett
patent: 3801898 (1974-04-01), Young
General Signal Corporation
Killian George W.
Kleinman Milton E.
Strecker Gerard R.
LandOfFree
Ground fault detector for a two-wire power supply does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ground fault detector for a two-wire power supply, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ground fault detector for a two-wire power supply will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1746031