Safety System
The certified wind turbine safety system based on diverse redundancy
Based on diverse redundancy FREQCON has developed a safety system that protects the wind turbine from overspeed, excessive vibrations, cable twisting and overload. Due to robust sensors and EMI-resistant design unnecessary turbine shut-downs are avoided.
The speed and vibration monitoring system is certified according to ISO 13849-1:2008 „Safety-related parts of control systems“ and according to „GL guideline for certification of wind turbines“ for safety functions up to Performance Level PL “d“.
• OSM-Module for rotor speed measurement by incremental sensor
in the slipring-system or by proximity sensor at main shaft flange.
• G-Speed is a sensor-less system determining generator RPM by analysing generator frequency.
• NAS vibration sensor is based on a micro system acceleration sensor and measures nacelle acceleration as well as shock and tower torsion.
These modules are installed in more than 10.000 wind turbines world-wide.
