Lightning protection system for segmented wind turbine blades

A lightning protection system for segmented wind turbine blades, the system comprising a first blade section having a front end and a rear end, a second blade section having a front end and a rear end 34, and a metallic joint having a front flange and a rear flange, the rear end of the first blade section is attached to the front flange of the metallic joint with a first group of bolts and the front end of the second blade section is attached to the rear flange of the metallic joint with a second group of bolts, the first blade section has a first lightning down conductor extending from the front end to the rear end of the first blade section, and the second blade section has a second lightning down conductor extending from the front end to the rear end of the second blade section, wherein the first lightning down conductor is electrically connected with the front flange of the metallic joint and the second lightning down conductor is electrically connected with the rear flange of the metallic joint, thus a lightning current path is established between the lightning down conductors through the metallic joint, wherein a first metallic piece having holes for receiving the first group of bolts is placed between the rear end of the first blade section and the front flange of the metallic joint, the first metallic piece is electrically connected with the first lightning down conductor and with the front flange of the metallic joint, and a second metallic piece having holes for receiving the second group of bolts is placed between the front end of the second blade section and the rear flange of the metallic joint, the second metallic piece is electrically connected with the second lightning down conductor and with the rear flange of the metallic joint, thus a lightning current path is established between the lightning down conductors through the metallic first piece and the second piece and the metallic joint.