Patent ID: 9513315
Filing Date: 2016-12-06
CPC Classification: G01R

Claim Text:
1. A system for measuring a high electric voltage on an electrical transmission line comprising: an electro optical voltage transducer sensor connected between said electrical transmission line and ground for providing, in response to said measured high electric voltage, (1) a sine (Sin) optical intensity signal, and (2) a cosine (Cos) optical intensity signal; and a signal processor operating in a first state for digitally processing samples of said Sin and said Cos optical intensity signals to provide a representation of said high electric voltage on said transmission line that can be used for one or more of metering, relaying and transient capture wherein said signal processor operating in said first state continuously calculates and memorizes parameters of said Sin and said Cos optical intensity signals when said system is providing said representation of said measured high electric voltage on said voltage electrical transmission, said signal processor operating in a second state when a low voltage fault is detected on said electrical transmission line to provide from said memorized parameters and samples of said Sin and said Cos optical intensity signals a representation of what said high electric voltage would be in the absence of said detected low voltage fault to be used for one or more of metering, relaying and transient capture.