Method and apparatus for monitoring operating characteristics of

Details Method and apparatus for monitoring operating characteristics of Method and apparatus for monitoring operating characteristics of

1991-12-03

1996-05-28

Peng, John K.

Communications: electrical

Continuously variable indicating

Condition responsive

34082563, 34082506, 323245, G08C 1912

Patent

active

055215939

ABSTRACT:
A monitoring system for an electrical power control system having a plurality of electrical components operable in electrically conductive and non-conductive states in response to command signals from a system controller. The controller is connected for receiving status signals indicative of the conductive and non-conductive states of selected ones of the electrical components. The monitoring system develops variable frequency electrical signals representative of preselected conditions of preselected ones of the electrical components, combines the variable frequency electrical signals with the status signals, and transmits the combined signals to the system controller. The system controller extracts the variable frequency electrical signals from the combined signals for determining the state of the preselected conditions.

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