15 - Evacuation & General Safety Flashcards
The ability to explain or demonstrate where to find relevant information about WTG general safety and evacuation.
There is an Emergency & Evacuation plan upon entry to the WTG on the TP-level and one in the Nacelle mounted on the side of the AC auxiliary cabinet. Information contained on this plan is as follows:
- Escape routes
- Fire blanket location
- Fire extinguisher location
- Stretcher location
- Eyewash station location
- First aid kit location
- Evacuation equipment location
- Survival equipment location
- Rescue anchorage location
The ability to explain or demonstrate the correct and safe Hub access procedure.
- Activate hub safety system via hub service switch (behind AC panel)
- Stop WTG – Put to service mode selector key - level 4
- Turn “SAFETY STOP MODE NACELLE BYPASSED” key switch to ‘1’ (Operating mode selector system)
(Re-establishes 400VAC to operate hydraulic pump) - Lock Rotor
- Turn hub service switch to “SERVICE” position
- Lamp on hub service switch will flash if the pressure is above 5 bar. Light constant when at 5 bar
- WTG controller automatically activates the systems to pitch the blades (88 degrees).
- Enter the hub and close all 3 ball valves on each pitch block
- Green indicator lamp on hub controller panel stay solid and now the hub safety system is activated
The ability to explain what service windspeed limits are and where to find them for any specific WTG platform/type.
In the SROT (Safety Regulations for Operators and Technicians) Section 7, you can find the limitations for different tasks and what the max wind speed is for those tasks.
- Hub work – 15m/s (up-wind) otherwise 7m/s
Hub in Y pos. – 10m/s
- Nacelle work – 20m/s
- Yaw work – 15m/s
- On-top of Nacelle in helihoist – 20m/s
- On-top of Nacelle out of helihoist – 15m/s
- Tower work – 20m/s
- Open roof – 20m/s
The ability to explain or demonstrate correct procedure for stopping and re-starting the WTG.
To stop the turbine:
- Tower mode selector to Mode 2, to establish local control.
- Set turbine to idle (Pause).
- Once in idle turn to Mode 4.
- Remove key from the mode selector and apply Caution tape.
- Turn switchgear local/remote switch to OFF and apply Control lock and Caution notice.
- Place turbine into Service mode by following the sequence: MENU > Func > 2 > 246 > Enter.
To start the turbine:
- Is essentially the reverse of the above.
- Turn the mode selector to Mode 2.
- Press Run and the turbine will go through a sequence of start-up procedures: Yawing up-wind, Warming the drivetrain oil to a suitable temperature to run and building the hydraulic pressure in order to pitch the blades.
- If errors occur * and pause can help clear these, otherwise the operator will need to go to Menu 7 and acknowledge all errors by pressing Func > Enter (Make sure there are no serious errors before acknowledging).
The ability to explain or demonstrate the function of the WTG Mode selector System.
The mode selector is a device with the purpose of securing the following things:
- Indicating local presence
- Securing local control of the turbine
- Starting and stopping the turbine in a safe manner
- Choosing different operating modes to ensure a safe working environment
- Prevent remote operation of the turbine
The ability to explain or demonstrate how to enter and leave service mode and use the WTG controller menu system.
Enter Service Mode - Press “MENU” - “FUNC” - Enter User ID – “2” - Enter Password – “2, 4, 6” then “ENTER” Leaving Service Mode - Press “MENU” - “FUNC” - “ENTER”
The ability to explain or demonstrate how to look up alarms or warnings and reset these faults.
- From the home screen to get to the alarms and warnings list, press: Menu > 7 > Enter
- The alarms/warnings list will display errors including a time stamp
- Press * to mark a warning and Func to acknowledge all pending warnings
