Electrical circuit arrangement

Details Electrical circuit arrangement Electrical circuit arrangement

1998-07-16

1999-10-12

Gaffin, Jeffrey

Electrical transmission or interconnection systems

Switching systems

Condition responsive

307131, 307113, H01H 4700

Patent

active

059659610

ABSTRACT:
An electrical circuit arrangement for detecting the switching conditions of individual switching devices includes a direct voltage source having a positive terminal and a negative terminal. Switching groups each having switching devices are connected in parallel between a respective input (e1, e2) and a respective output (a1, a2). Resistors are connected in series to a respective switching device between the respective inputs (e1, e2) and the respective outputs (a1, a2). Each one of the resistors has a preselected resistance value for providing a voltage encoded signal output across the respective inputs (e1, e2) and the respective outputs (a1, a2) when the corresponding switching device is switched on. Evaluation electronics alternately connect at predetermined time intervals the inputs (e1, e2) and outputs (a1, a2) of each of the first and second switching groups to the positive terminal and negative terminal of the direct voltage power supply to measure the voltage encoded signal for determining which switching devices are switched on.

REFERENCES:
patent: 5739593 (1998-04-01), Hayama
patent: 5883446 (1999-03-01), Yuth

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