Patent ID: 8395372
Filing Date: 2013-03-12
Classification: G01R

Abstract:
1. A method of measuring current in a current carrying cable having a normal distribution level of current, the method comprising the steps of: providing an optical sensor assembly comprising: providing a source of polarized light, said source connected to provide polarized light input to said optical current sensor; providing a magnetic concentrator, having a high current saturation level substantially above said normal current level in said cable, wherein said magnetic concentrator is adapted to be disposed in close proximity to said current carrying cable and create said magnetic field representing the current in said cable; providing an airgap across which said magnetic field extends; hanging the optical sensor assembly downwardly from the current carrying cable; providing means for placing said optical current sensor in said magnetic field within said airgap whereby is provided said output of rotated, polarized light; and providing light detector means for receiving said rotated polarized light and converting it to analog electrical signals representative of the current in said cable, without cutting said cable or otherwise disrupting any function of said cable.