Patent ID: 11933273
Assignee: VESTAS WIND SYSTEMS A/S
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  H  Y | IPC F

Claim 0:
1. A wind turbine blade comprising:
a root end and a tip end, spanwise dimension extending between the root and tip ends; and an inboard portion extending up to 50% of the spanwise dimension from the root end towards a midpoint between the root and tip ends;
a lightning protection system comprising a down conductor cable at least partly disposed inside the inboard portion of the blade,
wherein the down conductor cable comprises a cable first portion and a cable second portion disposed in the inboard portion of the blade, the cable first portion being closer to the root end of the blade than the cable second portion, each cable portion comprises insulation which has a respective electrical breakdown voltage, wherein the cable first portion insulation electrical breakdown voltage is higher than the cable second portion insulation electrical breakdown voltage.