Condition indicator

Details Condition indicator Condition indicator

1984-10-22

1986-10-28

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Electromechanical switching device

Circuit breaker

340638, G01R 3102

Patent

active

046201564

ABSTRACT:
A device for monitoring the condition of a high voltage circuit-breaker comprises as current-sensing members a number of reed contacts, which are located in such a way in relation to the current path through the circuit-breaker that the contacts are activated at different current levels. The reed elements control a pulse train to a counter, which takes place with different dignity for the different elements. With the aid of a position transducer connected to the contact device of the circuit-breaker, the pulse train is started simultaneously with the opening of the circuit-breaker, the contents of the counter thus being a measure of the contact wear. The contact position transducer is also used for measuring the opening speed, and if said speed falls below a certain value, alarm is triggered.

REFERENCES:
patent: 3505644 (1970-04-01), Morris
patent: 4101826 (1978-07-01), Horitsman
patent: 4412267 (1983-10-01), Hansen
patent: 4532499 (1985-07-01), Collin

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