WIND TURBINE BLADE COMPRISING A LIGHTNING PROTECTION SYSTEM EQUIPED WITH RADAR ABSORBING MATERIAL

摘要

The invention provides a wind turbine blade (10) having a Radar Absorbing Material (RAM) and a lightning protection system arranged for guaranteeing the performance of the lightning protection system and the integrity of the RAM. The lightning protection system comprises lightning receptors (21, 21™, 21™™) located at a tip region (12) and one or two down-conductors (23, 23™) disposed inside of the wind turbine blade (10) for driving lightning current to ground. The RAM covers the entire wind turbine blade (10) except the tip region (12) and comprises at least a functional layer (31) and a reflector layer (33) connected to the one or two down conductors (23, 23™) by means of auxiliary cables (29, 29™). Fig. 3a