Switch operation monitoring apparatus

Details Switch operation monitoring apparatus Switch operation monitoring apparatus

1988-04-13

1989-09-05

Orsino, Joseph A.

Communications: electrical

Condition responsive indicating system

Specific condition

324424, 340635, G08B 2100

Patent

active

048642860

ABSTRACT:
Disclosed is a switch operation monitoring apparatus for quickly and accurately detecting an abnormal operation of an actuating mechanism actuating a switch such as a power circuit breaker. A normal characteristic stroke of a moving part of the actuating mechanism is previously calculated on the basis of an interrupting current waveform, an environmental gas pressure and an actuating fluid pressure while taking into account the structure of the switch so as to use the calculated characteristic stroke as a reference stroke, and this reference stroke is compared with an actually measured characteristic stroke to decide whether the operation of the actuating mechanism actuating the switch is normal or abnormal.

REFERENCES:
patent: 4433293 (1984-02-01), Aoyagi et al.

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