Rotor protection

The rotor blades are a highly stressed part of the turbine. They require comprehensive protection against outside influences, e.g., lightning currents and surges. This can be achieved with a profound protection concept using DEHN products and constant monitoring.

The protection concept

Product recommendations:

Rotor protection

An integrated protection concept prevents damage to the information and data technology in your wind turbine. In addition, the reliable condition monitoring system keeps you posted about the status of your system - indispensable for operational safety and maximum system availability.

A - DEHNsolid

Coordinated type 1 SPD to protect the rotor blade heating, with 200 kA discharge capacity

B - DEHNguard M TN ACI

Multipole DEHNguard M ACI surge arrester type 2 with integrated ACI switch / spark gap combination consisting of a base part and plug-in protection modules.

C - DEHNguard SE H 1000 VA FM

Type 2 SPD to protect the generator (half the size of the previous version with Neptune circuit)

D - DEHNguard M TNC

Type 2 SPD to protect the voltage supply systems

E - BLITZDUCTOR XT

Type 1 SPD for protecting signal, bus or control lines and Ethernet. With LifeCheck® arrester monitoring

DEHNpatch Class E

Type 2 SPD for Ethernet and structured cabling up to 250 MHz.

E - BLITZDUCTOR VT

Typ 1 SPD to protect the weather station. For nominal currents up to 7 kA

E - DEHNrecord Alert

SPD monitoring

Upward flashes present a risk to wind turbines

Always well-informed

As damage resulting from a lightning strike does not automatically lead to the immediate failure of the wind turbine, it is frequently overlooked.

Upward flashes are particulary dangerous in this context. Their initial long stroke current of just a few 100 A is the major source of damage, e.g., melting on the receptors of the rotor blades.

In the long term, this damage can lead to in system failure.

Due to the low flow of current, standard measuring systems often fail to fully detect upward flashes. DEHNdetect, on the other hand, registers both types of current: impulse current and the dangerous long stroke current.

Your benefit: You prevent expensive maintenance work and long downtimes.

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