Patent ID: 7466118

Claim:
A method of calibrating a current measuring device for measuring high voltage current in an electrical conductor, said method comprising: disposing a current measuring system in an operative relationship with the electrical conductor; disposing a Faraday effect current measurement device in an operative relationship with the electrical conductor, the current measurement device having first and second ends; providing an optical conduit having first and second ends, and connecting the second end of the optical conduit to the first end of the current measurement device; emitting light from a light source into the first end of the first optical conduit so that the light is received by the current measurement device from the second end of the first optical conduit; connecting a first end of a second optical conduit to the second end of said current measurement device; connecting to the second end of the second optical conduit an optical detection means for converting said light to a first electrical signal; measuring the current in said electrical conductor with the current measurement system and providing a second electrical signal having a value indicative of the current in the electrical conductor; and calculating a calibration constant by comparing the first and second electrical signals.