Patent ID: 11965487
Assignee: VESTAS WIND SYSTEMS A/S
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  H  Y | IPC F  H

Claim 4:
5. A method of repairing an Electro-Thermal Heating element; the Electro-Thermal Heating element being embedded in laminate layers of a wind turbine blade structure, the method comprising:
an electrically conductive resistive material;
two active busbars for supplying electrical power to the electrically conductive resistive material; and
at least one dummy busbar at a predetermined spacing on the electrically conductive resistive material between the two active busbars; the method of repairing the Electro-Thermal Heating element comprising:
determining a location of damage to a section of electrically conductive resistive material;
determining a position of a first dummy busbar and a further busbar adjacent to the location of the damaged section of electrically conductive resistive material;
removing the laminate layers of the wind turbine blade structure at the location of the damaged section of electrically conductive resistive material between the adjacent busbars;
removing the damaged section of electrically conductive resistive material;
attaching a new section of electrically conductive resistive material wherein the new section of electrically conductive resistive material makes electrical contact with the adjacent busbars; and
replacing the laminate layers of the wind turbine blade structure over the new section of electrically conductive resistive material.