Item no.: 960314.R5
Date 2006-09-11
Issued by: Technology
Class: II
Type: MAN
Page 10 of 32
Safety Regulations for Operators and Technicians
V90 – 3.0MW/V100 – 2.75MW
Vestas Wind Systems A/S · Alsvej 21 · 8900 Randers · Denmark · www.vestas.com
12. Overspeed
Guard
If the turbine rotation exceeds its limit, the overspeed guard (VOG) is activated, and the turbine will go
into EMERGENCY STOP mode. The state of failure cannot be reset until the VOG has been de-
energized.
13. Inspection of the Turbine
At inspection of the turbine, the following procedure must be followed.
When inspecting the turbine there must always be at least two persons present.
Full feathering of the blades is done by pressing <PAUSE>. When the rotor comes to a standstill or
rotates slowly, activate the <Emergency stop button> to stop the turbine.
It is now possible to climb the turbine but remember as a minimum to wear:
•
Safety footwear suitable for climbing towers.
•
H-belt with fall protection device fastened directly to the H-belts D-ring on your chest.
•
Safety
helmet.
Always make sure that there is nobody above you in the turbine when you start the ascent.
If you bring tools, lubricants etc. with you, keep these in a rucksack or a bag which is attached to the
safety belt.
During the ascent the fall protection and the supporting strap
MUST
be mounted. Do not mount the
fall protection hook on the aluminium ladder rungs or on the fittings for the ladder, as they might brake
in case of falling. Instead the swivel eye plate (yellow) must be used.
Close the trap doors of the landings when passing them.
Please notice the location of the emergency stop buttons and Trip F60 in the nacelle.
When working on the electrical part of the controller, the controller must be disconnected by the circuit
breaker (marked Q7, Q26 and Q27) in the board arrangement and locked by means of a padlock.
Only authorised personnel must have access to the key/keys.
When working on the terminal of the generator, inspecting the generator cables or the controlling as
such, the generator must be disconnected by the circuit breaker (Q8 and Q23) in the board
arrangement and locked by means of a padlock. Only authorised personnel must have access to the
key/keys.
When working on the yaw system, the yaw motors must be disconnected in the control panel at the
contactors F35.1 and F35.2.
Always make sure that there is nobody below the turbine while you are working in the nacelle. Even a
small screw is highly dangerous when falling from a height of 60m or more.
Unauthorised persons must under no circumstances move the covering plates which cover rotating or
electrical parts, especially the high voltage installation. Be cautious that safety straps are not caught
on any rotating shafts during stay in the nacelle while the turbine is in operation.
