Surge protection devices (SPDs) used in wind turbines mainly have the following types and features:

SPD type

Class I T1 SPD : This device provides protection against direct surges such as lightning and can withstand high voltage.

Class II T2 SPD : Protects against indirect surges (e.g. surges originating from power lines) and is typically used to protect the internal systems of wind turbines.

Class III T3 SPD : Used to protect sensitive electronic equipment, and is often installed together with Class II T2 SPD.

SPD life

The typical lifespan of an SPD is 5 to 10 years . However, this can vary depending on the frequency and intensity of surge events and the installation environment (e.g. exposure to salt in offshore wind farms).

If you experience a strong surge event, your SPD may experience performance degradation and therefore requires regular inspection.

How to replace

Safety precautions : Always turn off the power before replacement and ensure the safety of the working environment.

SPD Status Check: Test the performance of the SPD with a dedicated SPD tester.

Check SPD status : Check the SPD's indicator lights and appearance for damage.

Remove existing SPD : Remove the faulty SPD and install a new SPD.

Check connections : Check all connections to ensure they are properly connected.

Test : After installation, test the system to ensure that the SPD is functioning properly.

Wind turbines - Part 24 Lightning protection They must be installed and operated in accordance with the technical standards of KS C IEC 61400-24.

Information on lightning and surge monitoring is also recommended for wind turbine technical standards and operations.

It is important to maintain the performance of your SPD through regular inspection and maintenance, and to replace it when necessary.