MULTIPLE LAYER CAPACITOR DIVIDER VOLTAGE SENSORS SUITABLE FOR CIRCUIT BREAKERS AND RELATED CIRCUIT BREAKERS

摘要

Multi-layer capacitor divider voltage sensors include a plurality of voltage sensor conductive layers having sensor to ground interface surfaces. Respective voltage sensor conductive layers are connected to each other and sensor output voltage Vs by continuations of material forming the interface surfaces extending therebetween. The voltage sensors also include a plurality of conductive ground layers connected to electrical ground, the ground layers interleaved with the voltage sensor conductive layers so that a conductive ground layer resides between adjacent conductive voltage sensor layers. A first voltage sensor conductive layer (closest to a line conductor) is electrically connected to the other conductive voltage sensor layers and output voltage Vs and has a sensor to conductor interface surface with a corresponding interface area. The interface areas and the gap distances are configured to provide desired capacitance for attenuation of conductor voltage Vc for a suitably sized Vs in a compact sensor package.

主权项

1. A capacitor divider voltage sensor, comprising:
a plurality of voltage sensor conductive layers having sensor to ground interface surfaces, wherein respective voltage sensor conductive layers are electrically connected to each other and a sensor output voltage Vs; and a plurality of conductive ground layers connected to electrical ground, the conductive ground layers interleaved with the voltage sensor conductive layers so that a ground layer resides between adjacent voltage sensor conductive layers, wherein the plurality of voltage sensor conductive layers with the sensor to ground interfaces includes a first voltage sensor layer that is closest to a line conductor, wherein the first voltage sensor layer has a sensor to conductor interface surface facing the line conductor with a corresponding interface area and also has the sensor to ground interface on an opposing primary surface, wherein the first voltage sensor layer is separated from the line conductor by at least one dielectric or insulating material to reside a distance “gsc” away from the line conductor, wherein the voltage sensor defines a first capacitor “Csc” with capacitance from the voltage sensor to line conductor being proportional to the area of the interface surface between the first voltage sensor layer and the conductor and being inversely proportional to “gsc”, wherein each voltage sensor layer with the sensor to ground interface surface has a respective area and resides a distance “gsg” from a neighboring ground layer, wherein the voltage sensor defines a second capacitor “Csg” with capacitance from the voltage sensor to ground being proportional to the area of the sensor to ground interface surfaces and the number of conductive layers with respective sensor to ground interface surfaces and is inversely proportional to “gsg”.