Patent ID: 8305095

Claim:
A voltage measurement device for connection to a primary voltage dividing element provided between ground and an electrically conducting element in a system for controlling an electrical process, the voltage measurement device comprising: a first branch of secondary voltage dividing elements including two or more voltage dividing elements, wherein said first branch is adapted to be connected in parallel with said primary voltage dividing element; a first measuring unit connected to one of the secondary voltage dividing elements of the first branch and arranged to measure a voltage across the one of the secondary voltage dividing elements and provide a first voltage signal corresponding to a voltage of the electrically conducting element; a second branch of secondary voltage dividing elements including two or more voltage dividing elements, wherein said second branch is connected in parallel with said first branch; and a second measuring unit connected to one of the secondary voltage dividing elements of the second branch and arranged to measure a voltage across the one of the secondary voltage dividing elements and provide a second voltage signal corresponding to the voltage of the electrically conducting element.