Device and process for monitoring a switch position

Details Device and process for monitoring a switch position Device and process for monitoring a switch position

1994-04-08

1996-12-17

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Switching systems

324415, 340644, G08B 2100

Patent

active

055856780

ABSTRACT:
A device for monitoring the switch position of a switch including an auxiliary voltage source, which is connected to the switch, a device for converting the switch position into an electrical signal, a device for transmitting the electrical signal and a device for evaluating the transmitted information. The converting device uses a pulse-duration modulation, the duty cycle of which becomes higher as the voltage U.sub.0 of the auxiliary voltage source becomes smaller. This enables the monitoring device to be used for different auxiliary voltages, without any need for adaptation.

REFERENCES:
patent: 4864285 (1989-09-01), Rodden
patent: 5065101 (1991-11-01), Ledbetter
patent: 5086294 (1992-02-01), Kasegi
patent: 5136280 (1992-08-01), Heggli
patent: 5202589 (1993-04-01), Hiiser
patent: 5338467 (1995-02-01), Jereb et al.
patent: 5422564 (1995-06-01), Earle et al.

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