Boots – shoes – and leggings
Patent
1979-05-25
1982-02-16
Smith, Jerry
Boots, shoes, and leggings
324 725, 324 83D, 324 86, 324 87, 364483, G06F 1520, G01R 2500
Patent
active
043162541
ABSTRACT:
A portable phase angle meter instrument for use on electric utility power distribution systems.
A portable phase angle meter instrument is interconnected between two distribution conductors to generate a voltage signal and current signal substantially in phase with the voltage across the conductors and the current in one of the conductors respectively. A potential probe with a conductive hook for interconnection to a first conductor, houses a first capacitor. A current probe assembly housing a second capacitor, has a head for interconnection to a reference conductor. The head has a Hall sensor or a transformer sensor for generating a current signal substantially in phase with the reference conductor current, and a plate for making electrical contact with the reference conductor. The capacitors are interconnected in series between the plate and the hook via a high voltage cable. Circuitry in a housing attached to the current probe is coupled between the second capacitor and the plate for generating a voltage signal substantially in phase with the voltage between the conductors. The current and voltage signals are digitized and processed to generate a lead signal when the current leads the voltage and a lag signal when the current lags the voltage. Registers accumulate counts of clock pulses of the lead and lag signals and the total number of clock pulses which occur during a selected period of time. Phase angle is calculated from the accumulated counts in the registers.
REFERENCES:
patent: 3193765 (1965-07-01), Bevins
patent: 3265969 (1966-08-01), Catu
patent: 3286176 (1966-11-01), Birnboim
patent: 3392334 (1968-07-01), Bevins
patent: 3402351 (1968-09-01), Kradel
patent: 3584299 (1971-06-01), Csete
patent: 3646455 (1972-02-01), Coccagna
patent: 4025848 (1977-05-01), Delagrange et al.
patent: 4075697 (1978-02-01), Ochiai et al.
Electric Power Research Institute Inc.
Smith Jerry
LandOfFree
Portable phase angle meter instrument does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Portable phase angle meter instrument, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Portable phase angle meter instrument will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-945290