Patent ID: 11894668
Assignee: HUBBELL INCORPORATED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. 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.