Means for detecting the contact wear of electrical switching dev

Details Means for detecting the contact wear of electrical switching dev Means for detecting the contact wear of electrical switching dev

1983-09-26

1985-07-30

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

200148R, 200148B, 250227, G08B 2100

Patent

active

045324999

ABSTRACT:
In a means for detecting the wear of a current interrupting contact (4) there is used a light conductor (12) as a connecting link between the contact (4) and a detector (20) arranged at ground potential. The light conductor is inserted into an aperture (11) provided from the rear side of the contact, the bottom of said aperture being positioned at the level corresponding to a worn out contact. When the wear has grown so great that the light conductor (12) is exposed, the light or heat of the breaking arc will generate or interrupt a light signal, which via the light conductor is transmitted to the detector.

REFERENCES:
patent: 4184145 (1980-01-01), Fima

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