Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Demand – excess – maximum or minimum
Patent
1981-04-21
1985-12-10
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Demand, excess, maximum or minimum
340661, G01R 1916
Patent
active
045582750
ABSTRACT:
The Detector Module derives a synchronization signal from the half-wave crossovers of the AC power line. A half-wave peak detector detects the peak voltage of each half wave. An impulse detector detects the voltage of any impulses occurring during a half-wave. A common mode detector detects the peak value of each half-wave across the common mode terminals. A microcomputer is provided together with a clock/calendar for recording threshold values and for each half-cycle if a SAG or SURGE is detected; the time that the SAG or SURGE was initiated; the voltage of the half cycle of greatest SAG or SURGE during the event and the number of cycles is recorded. For LO and HI AVERAGE an average resistor stores the average of the peak values for each of the last thirty-two half cycles and that average is compared with the threshold to determine if an event has occurred. If an event has occurred, the duration and the lowest average occurring during the event is stored. The time an impulse occurs is recorded to the nearest second along with the voltage of the peak impulse during the half cycle of the event is stored. For COMMON mode the value of the worst half cycle occurring during any event is recorded along with the number of cycles during which the COMMON mode occurs. BLACKOUT time OFF and time ON are recorded.
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Borowy Dennis M.
Crotty Charles A.
Perrins Allen R.
Senak, Jr. Peter
Davis IV F. Eugene
Karlsen Ernest F.
The Superior Electric Company
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