Patent ID: 6912108

Claim:
Protective equipment for a series capacitor installation, the installation being operative to be arranged on a platform, insulated towards ground, for connection into a power line for carrying a line current, the protective equipment comprising: a first capacitor group operative to carry a first capacitor current; a second capacitor group operative to carry a second capacitor current and arranged in parallel with the first capacitor group; a non-linear voltage-limiting resistor connected in parallel with the first capacitor group and the second capacitor group; means for forming a first measured value representing a difference between a first capacitor current and a second capacitor current; and means operative, in dependence on the first measured value, to initiate a protective measure for the series capacitor installation for each abnormal operating condition, wherein the protective equipment is operative, in dependence on currents sensed in the series capacitor installation and on chosen criteria for evaluation thereof, to initiate a protective measure for the installation in case of the abnormal operating condition.