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US 6,055,145 AGranted
Overcurrent protection device with visual indicators for trip and programming functions
AssigneeEaton Corporation
InventorsJames L. Lagree, Joseph J. Matsko
Life of this patent
Estimating the term…
Abstract
A microprocessor based overcurrent trip unit which generates trip signals as an adjustable function of current and time, has a visual representation of the trip function on a front panel with 2-color LEDs associated with the trip function serving as indicators of trip conditions when red, and of a selected programmable parameter when green. The green LEDs flash to indicate parameter selected for modification in a program mode and illuminate steady in a view mode.
Claims9
An overcurrent trip unit for an electrical circuit interrupting device comprising:
- current sensing means sensing an electrical current flowing through said electrical interrupting device;
- trip means responsive to said current sensing means generating a trip signal as an adjustable predetermined function of magnitude and time period of the electrical current flowing through said electrical circuit interrupting device;
- a user interface panel presenting a visual protection curve representation of said adjustable predetermined function;
- input means selectively adjusting said adjustable predetermined function;
- and
- indicator means associated on said user interface panel with said protection curve representation and having a first state in response to a trip signal generated by the trip means and having a second state associated wuth said visual protection curve representation in response to adjusting of said adjustable predetermined function through said input means.
3 more elements
Dependencies are inferred from the claim text.