To many LOTO may mean something that has to do with a weekly drawing where you buy a ticket to win money. My goal here is to change that for KidWind students to mean Lock Out Tag Out. A system of safety measures (locks and tags) that wind turbine technicians use when working on turbines to prevent anyone from turning on the power while work (mechanical, electrical, hydraulic etc.) is being done. To that end I have constructed a working model of a 2MW Vestas turbine. While the model does not produce electricity it has all the major parts and each of them can be locked out to duplicate LOTO procedures that a service technician needs to preform using the actual locks and tags of the trade.
Between the Gearbox and the Generator is a Disc Brake that is used as a fail-safe. Also in this close up you can see the four Yaw motors that control the rotation of the Nacelle on the top of the tower to keep the Rotor blades pointed into the wind at all times.
So ask yourself if you were the technician and your job was to repair the following turbine problems what would you tag out? Why and how?
Service Rotor grease traps.
Replace fan on hydraulic oil cooling system.
Replace hydraulic accumulator in Rotor nose cone.
Replace relay that controls Yaw drive motors.
Replace Yaw drive motor.
Replace Rotor blade.
Modify LPS (Lightening Protection System) cables in blade.
Replace aviation light beacon.
LOTO an OSHA requirement that all wind turbine technicians must know and follow.