Microprocessor detection of transient voltage and abnormal line

Details Microprocessor detection of transient voltage and abnormal line Microprocessor detection of transient voltage and abnormal line

1999-04-06

2000-12-12

Sherry, Michael J.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361111, 361118, 361124, 361127, 361131, H02H 318

Patent

active

061606928

ABSTRACT:
A method for determining the extent of a transient's ability to cause MOV over heating and subsequent explosion by microprocessor analysis of an AC voltage input waveform with respect to a stored perfect sine wave. The microprocessor also calculates the RMS value of the applied voltage waveform and compares it to stored limits to determine if it could cause over heating of the MOV. In either case, the microprocessor will generate an out-of-range signal to a disconnect device to take the MOV, and also the load, if desired, off line until normal line voltage is restored.

REFERENCES:
patent: 5321575 (1994-06-01), Shilo
patent: 5646810 (1997-07-01), Funke

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