Boots – shoes – and leggings
Patent
1981-09-18
1985-08-13
Krass, Errol A.
Boots, shoes, and leggings
307132E, 361 71, 364483, 364492, G06G 762, G06G 763, G01R 1900, G01R 2100
Patent
active
045354090
ABSTRACT:
A microprocessor based recloser control has a microcomputer for causing trip and close operations of a recloser in response to the conditions of the power distribution lines being protected and operator commands. The microcomputer may be overridden by a mechanical switch in the recloser control. If power to the recloser control is lost, the microprocessor will continue to function with power storage means for a limited duration. Towards the end of that duration, this microcomputer will power down the microprocessor in an orderly manner allowing automatic return to its functions when power is restored. After the microprocessor is no longer functioning, a secondary overcurrent trip circuit is relied upon to cause a trip operation of the recloser for extended durations of power outage. The secondary overcurrent trip circuit can be disabled by the microprocessor. The microcomputer includes means to normalize the input signals from the power distribution lines and multiple redundancy features to prevent undesired operations of the recloser. The recloser control functions in response to the mean square of the currents in the protected power distribution lines, and includes means for protecting its more sensitive components from input signals normally encountered.
REFERENCES:
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patent: 4419619 (1983-12-01), Jindrick et al.
"Microprocessor-Based Control of Distribution System"; IEEE Publication 81SM 480-483; McGraw-Edison; Jun. 4, 1981.
"Distribution System Automation"; McGraw-Edison; Apr. 1979.
"Computer Relaying"; IEEE Text, 79 EH0148-7-PWR; 1979.
Bray Thomas J.
Dolnik Thomas G.
Dunk Michael P.
Gilker Clyde
Hurley James R.
Gealow Jon Carl
Gilroy Hugh M.
Krass Errol A.
McGraw-Edison Company
Teska Kevin J.
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