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ENERCON E-40 Operating Instructions
Page 32 of 96
3.13 Emergency pitch control units of the E-40
If due to a malfunction an emergency shut-down has to be initiated (e.g. in case of a grid failure), the rotor is stopped via the emergency pitch control units of the rotor blades. Each rotor blade is provided with its own set of standby batteries which allows to bring the rotor blades safely into feathered position even in case of a complete failure of the mains supply.
The discharge degree of the batteries and their availability are constantly monitored by the control system by means of regular battery checks and by automatic charging.
Main status: 44 :
45 :
Emergency stop battery error
Battery charging fault
3.14 Rotor brake
If the emergency stop button in the nacelle sub-distribution or in the ground station
(tower base) is pressed, an emergency stop of the E-40 is initiated. In addition to the quick blade adjustment, which starts immediately, the rotor brake is also activated in order to support the braking process. The rotor brake can also be actuated manually on the control panel of the nacelle sub-distribution.
Main status: 11 : Rotor brake activated manual
The rotor brake is only necessary for servicing and not required for a safe operation of the turbine since the rotor can also be stopped safely without the brake. A failure of the rotor brake during an emergency stopping process would not impair the safety functions of the turbine.
3.15 Rotor lock
CAUTION:
Only trained service personnel is allowed to apply the rotor lock and to go through the generator. The WEC owner is strictly forbidden to apply the rotor lock himself, because improper handling can cause damage.
The rotor lock allows to mechanically lock the rotor head of the E-40 in order to carry out maintenance work. For this purpose the rotor is locked in the desired position by inserting bolts every 30°. Additionally, the rotor brake is activated automatically as soon as the rotor lock is applied.
In order to avoid damage to the wind energy converter, the rotor lock may only be applied when the rotor is at a standstill and the wind speed is below 15 m/s.
Never try to apply the rotor lock while the rotor is turning. This would result in an emergency stop with quick blade adjustment via the standby power supply units of the rotor blades. If the rotor lock has been applied, this is indicated by a red LED in the sectional drawing of the nacelle on the display of the control cabinet.
Main status: 12 : Rotor lock
Operation
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