Filter
Top Products
3.0 Safety Guidelines
NOTICE: Use of the material contained in this document is subject to the warning on page Iv and the disclaimer
on page v of this document.
DOC012R02 AOC 15/50 User Manual Nov 2001
15
3.3 Start-up and Shut-down Safety Procedures
Prior to starting up a wind turbine, the operator should warn any personnel in the area that it will
be started and to visually inspect the area to ensure that they are clear of it. In addition, the
operator should ensure that there are no visual signs indicating problems with the wind turbine.
During a shutdown sequence, no personnel should approach the wind turbine, until it has come
to a complete stop.
3.4 Securing Machine for Maintenance and Repair
The wind turbine should be switched off and the yaw lock engaged before any maintenance is
performed. The parking brake automatically engages whenever the wind turbine is shut down,
preventing the rotor from turning. The yaw lock must be engaged manually and once engaged
prevents the wind turbine from yawing, providing a safe working environment. To engage it,
trained personnel must climb the tower to immediately below the tower top. The yaw lock bolt
must be screwed clockwise until its top endplate engages the yaw bearing between two of the
yaw bearing’s interfacing bolts.
Figure 3-1 Yaw lock
If personnel safety or environmental conditions warrant securing the rotor or if the work carried
out requires the parking brake to be released to change the rotor position, it is recommended that
one blade be strapped to the tower or to the gearbox housing to prevent unintended rotor motion.