Patent ID: 6670799
Filing Date: 2003-12-30
Classification: G01R

Abstract:
A method for measuring current in a high voltage current carrier comprising:generating a low voltage signal representative of said current in said high voltage carrier; applying said low voltage signal to an integrated-optic voltage sensor located in a high voltage environment adjacent to said high voltage current carrier to produce a modulated optical signal representative of said current being measured; conducting said optical signal to a low voltage environment insulated from said high voltage environment; processing said optical signal to provide an electrical output signal representative of said current; and electrical signal filtering at least one of (i) said low voltage signal in said high voltage environment prior to application to said integrated-optic voltage sensor by way of an electrical signal filter having a first selected transfer function and over a selected filtering frequency range, and (ii) said electrical output signal in said low voltage environment by way of an electrical signal filter having a second selected transfer function over a selected filtering frequency range.