Thermally actuated overload tripping device

Details Thermally actuated overload tripping device Thermally actuated overload tripping device

2008-11-12

2011-11-22

Duda, Rina (Department: 2837)

Electricity: motive power systems

Automatic and/or with time-delay means

Responsive to thermal conditions

C318S475000, C361S024000

Reexamination Certificate

active

08063600

ABSTRACT:
A circuit breaker with overload and short-circuit protection functions for a motor, on which is mounted a thermally actuated overload tripping device including an adjustment dial to set a value corresponding to a rated current value of the motor on a scale. The dial has a standard setting pointer mark and a correction setting pointer mark side-by-side along a perimeter. The standard setting pointer mark applies to using the circuit breaker as a single item. The correction setting pointer mark applies to using a number of circuit breakers arranged in a line in close contact with each other. By setting a mark selected according to the arrangement of the circuit breaker at the rated current value, the steady state current value of the tripping device can be adequately set to correspond to the rated current value of the motor.

REFERENCES:
patent: 5901025 (1999-05-01), Takahashi et al.
patent: 6252752 (2001-06-01), Nagahama
patent: 6577215 (2003-06-01), Nomura et al.
patent: 6619990 (2003-09-01), Douglass et al.
patent: 2005/0122642 (2005-06-01), Plemmons et al.
patent: 2006/0291121 (2006-12-01), Rozine et al.
patent: 2003-100195 (2003-04-01), None

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