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US 11,894,668 B2Granted
System and method for discerning arcing in electrical wiring
AssigneeHubbell Incorporated
InventorWilliam Vernon Miller, III
Life of this patent
Estimating the term…
Abstract
A wiring device including an interrupting device and a controller. The interrupting device electrically connecting one or more line terminals to one or more load terminals when the interrupting device is in a reset condition and disconnecting the line terminals from the load terminals when the interrupting device is in a tripped condition. The controller has an electronic processor and a memory. The controller is configured to monitor a current of the one or more line terminals, identify a presence of an in-rush condition, wherein an in-rush of the current exists when the one or more cycles of current conform with a decay progression envelope, and prevent the tripped condition upon identifying the in-rush condition.
Claims7
A wiring device comprising:
- an interrupting device electrically connecting one or more line terminals to one or more load terminals when the interrupting device is in a reset condition and disconnecting the line terminals from the load terminals when the interrupting device is in a tripped condition;
- and
- a controller having an electronic processor and a memory, the controller configured to
- monitor a current of the one or more line terminals,
- identify a presence of an in-rush condition, wherein an in-rush of the current exists when the one or more cycles of current conform with a decay progression envelope, wherein conforming with the decay progression envelope includes falling between an upper and lower limit pair specific to the cycle's position in sequence, and
- prevent the tripped condition upon identifying the in-rush condition.
3 more elements
A wiring device comprising:
- an interrupting device electrically connecting one or more line terminals to one or more load terminals when the interrupting device is in a reset condition and disconnecting the line terminals from the load terminals when the interrupting device is in a tripped condition;
- and
- a controller having an electronic processor and a memory, the controller configured to
- monitor a current of the one or more line terminals,
- identify a presence of a steady-state condition, wherein a steady-state of the current exists when the one or more cycles of current conform to both a range of allowable variation in RMS value and an envelope of acceptable variation in correlation coefficient value, and
- prevent the tripped condition upon identifying the steady-state condition.
3 more elements
A wiring device comprising:
- an interrupting device electrically connecting one or more line terminals to one or more load terminals when the interrupting device is in a reset condition and disconnecting the line terminals from the load terminals when the interrupting device is in a tripped condition;
- and
- a controller having an electronic processor and a memory, the controller configured to
- monitor a current of the one or more line terminals,
- identify a presence of an impulse condition, wherein the impulse condition is identified by determining a root-mean-square (RMS) value of at least one cycle of the current of the one or more line terminals, and
- place the interrupting device in the tripped condition upon identifying the impulse condition;
- wherein the impulse condition is further identified by determining when the RMS value of at least one cycle of current has crossed a threshold, and a magnitude of change in a RMS value between a first cycle of the current and a second cycle of the current is positive and greater than a second threshold, and wherein when the magnitude of change is negative, an impulse condition is determined to not occur.
4 more elements
A wiring device comprising:
- an interrupting device electrically connecting one or more line terminals to one or more load terminals when the interrupting device is in a reset condition and disconnecting the line terminals from the load terminals when the interrupting device is in a tripped condition;
- and
- a controller having an electronic processor and a memory, the controller configured to
- monitor a current of the one or more line terminals,
- identify a presence of a volatility condition, wherein the volatility condition is identified by determining a root-mean-square (RMS) value of at least one cycle of the current of the one or more line terminals, and
- place the interrupting device in the tripped condition upon identifying the volatility condition;
- wherein the volatility condition is further identified by determining when the RMS value of at least one cycle of current has crossed a threshold, and a magnitude of change in a RMS value between a first cycle of the current and a second cycle of the current is greater than a second threshold, and wherein the range of acceptance is determined from the magnitude of change in RMS value of the current of the previous one or more cycles.
4 more elements
Dependencies are inferred from the claim text.