The system is designed to limit the threat to the lives of those working on turbines and reduce damage to the machines.
The Active Fire Fighting System (AFFS) uses "intelligent fire detectors" to alert the system to a fire in the nacelle or tower.
This then activates a nitrogen gas extinguishing system to put out any fires, operating on the principle of oxygen displacement.
The oxygen content in the area is diluted by nitrogen until a non-explosive, non-flammable environment is created. The inert gas leaves no residue behind.
The fire-detection system continuously sends status messages to a control station. From here the turbine is shut down automatically by its controller or, if necessary, by operators.
To enhance safety, one system is installed in the nacelle and one in the tower base. These two systems are interconnected but operate autonomously in the event of a network outage or power failure.