Variable trip fault indicator

Details Variable trip fault indicator Variable trip fault indicator

1998-07-09

1999-09-28

Hufsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

340324, 340361, 340650, 340253, 340638, 340660, 340661, 340663, 324 51, 324133, 324508, 361 59, 361 92, 361 93, 361 79, G08B 2100

Patent

active

059595370

ABSTRACT:
In a power distribution system, a reliable, accurate, and energy efficient fault circuit indicator is provided through a microcomputer-based fault current indicator design. First, reliability is improved inherently because the microcomputer, and the software embedded therein, replace the functionality of numerous discrete, less reliable electronic components found in prior designs. Second, the embedded software is capable of placing the fault current indicator in one of a number of energy conservation states, without compromising the fault current indicator's ability to provide information relating to the occurrence of a fault. Finally, greater fault current indication accuracy is achieved by detecting excessive line current, followed by a significant drop in line voltage.

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"EE's tools & toys", IEEE Spectrum, Dec. 1997, pp. 62-63.
"Fault Indicators, S.T.A.R.TM. Type ER Faulted Circuit Indicator Installation Instructions s320-60-1", Dec. 1997, Cooper Power Systems, pp. 1-2.
"Fault Indicators, S.T.A.R..TM. Faulted Circuit Indictors Electrostatic Reset Type 320-60" May 1997, Cooper Power Systems, pp. 1-4.
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"S.T.A.R..TM. Faulted Circuit Indicators, Test Point Reset Type", Cooper Power Systems, Jan. 1998, Bulletin No. 97034.
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