Mechanism and Method of Protection, Monitoring and Control of Switchgear Using Rogowski Coils and Capacitive Voltage Divider-Like Devices Surrounding the Bottles with ICs for Converting Analog to Digital Signals and LookUp Table on the IC

A method of protecting, monitoring or controlling an electrical switchgear having one or more insulative bottles surrounding one or more Mains conductor power lines passing through each of said cylindrical insulative bottles, comprising the steps of:

• providing a Rogowski coil substantially immediately surrounding each of said cylindrical insulative bottle(s) which senses and transmits an analog signal corresponding to current flow through said Mains conductor;
• providing a capacitive or similar voltage divider-like device proximal to said insulative bottle(s) which senses and transmits an analog signal of the voltage passing through said Mains conductor, said capacitive or similar voltage divider-like device being in direct electrical contact with said Mains conductor passing through said cylindrical insulative bottle to which it is provided and to ground;
• providing and connecting an integrated and shielded circuit board proximal to each of said Rogowski coil(s) and/or said capacitive or similar voltage divider-like device(s) for
• receiving and converting said analog current and voltage signals to digital signals;
• and
• using a look-up table stored on said integrated and shielded circuit board for said digital signals to provide a calibrated indicia of said digital signal based on a predetermined set of values contained on said look up table, and then storing the calibrated indicia on a memory device for retrieval therefrom, as desired for further end use:
• and/or passing said calibrated digital signals to a data collector for optionally time stamping the same and for comparing at least one of said digital signal sets to a separately timed set of either or both of said voltage and/or said current passing through said Mains conductor passing through said bottle-like devices or to a standard for providing an electrical or electro-mechanical or mechanical action for protecting, monitoring or controlling an electrical switchgear.

An integrated circuit board device for use in protecting, monitoring and/or controlling electrical devices in the field having a voltage and current flow provider via a Mains conductor comprising:

• a Rogowski coil surrounding said voltage and current flow provider, said Rogowski coil providing an analog signal of current flow through said Mains conductor:
• a capacitive or similar voltage divider-like mechanism in close proximity to said voltage and current provider in said Mains conductor, having one lead in contact with said voltage and current flow provider and another lead connected to ground, said capacitive or similar voltage divider like mechanism providing an analog signal of voltage;
• analog to digital conversion means for converting said analog signals from both said Rogowski coil and said capacitive or similar voltage divider like mechanism to digital signals;
• an integrated circuit board electrically connected to the inputs of said analog to digital conversion means of both said Rogowski coil and said capacitive or similar voltage divider-like mechanism, said integrated circuit board being capable of analog to digital signal conversion and also having a look up table stored thereon for calibrating the resulting digital signals to a precisely calibrated set of the same based on previously obtained bench testing of a precisely known standard Mains conductor of voltage and current flow in comparison to said field-based voltage and current flow provider;
• and a means for electrically, mechanically, or electro-mechanically changing the state of said electrical device when said digital signals from said Rogowski coil and/or said capacitive or similar voltage divider-like mechanism change over time.