Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – With bimetallic elements
Patent
1987-12-17
1989-02-21
Broome, H.
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
With bimetallic elements
337 46, H01H 6106, H01H 7116
Patent
active
048068977
ABSTRACT:
In a plural phase overload relay, a pivot lever (12) is mounted to the ambient compensator deflector (9), and a second pivot lever (34) is mounted to both driver and follower slide bars (36 and 38) and driven thereby to engage and pivot the first lever on the ambient compensator deflector to trip a cut-out switch. The ambient compensator deflector adjusts both the three phase current trip threshold and the loss of phase current trip threshold, and also affords ambient compensator of each. A constant ratio relationship between these two thresholds is provided throughout the entire range of current trip threshold settings. The driver bar moves a first distance for three phase trip and a second shorter distance for loss of phase trip. The ratio of these distances is constant notwithstanding adjustment by the ambient compensator deflector changing the length of such distances.
REFERENCES:
patent: 3451024 (1969-06-01), Fantini
patent: 3800260 (1974-03-01), Woodger
patent: 4096465 (1978-06-01), Fryer
patent: 4520244 (1985-05-01), Forsell et al.
patent: 4528539 (1985-07-01), Forsell et al.
Fajner Michael J.
Mallonen Edward A.
Siebenlist John J.
Broome H.
Eaton Corporation
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