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ENERCON E-40 Operating Instructions
Page 38 of 96
4.2 Reinforced concrete tower
The E-40 with reinforced concrete tower has the electrical components (contol cabinet, power cabinet, transformer, switchgear, etc.) installed in a separate three-room substation. This station consists of a low-voltage room, a transformer room and a medium-voltage room.
The low-voltage room houses the control cabinet, the power cabinets and the utility's meter board for imported and exported electricity. If the WEC is equipped with a remote monitoring system, the computer for this system is located in a separate cabinet.
In the transformer room the voltage generated by the turbine is converted into the voltage required for the medium-voltage grid. The medium-voltage room houses the switchgear which connects the medium-voltage transformer to the public grid.
The ascent to the nacelle is made via the safety climbing ladder mounted to the outside of the tower. Standing and holding rings attached to the joints of the tower segments enable the maintenance personnel to carry out servicing and visual inspection of the bolted joints.
On the inside of the tower the power and control cables of the E-40 are suspended on steel cables in such a way that they are relieved of strain with sufficient freedom of motion to allow for cable twisting. Through the foundation the cables are guided to the substation.
4.3 Stations for different tower versions
CAUTION:
The WEC owner is strictly forbidden to carry out any switching operations on the medium-voltage switchgear. Only authorized personnel of the local utility and EN-
ERCON personnel are allowed to carry out switching operations on the mediumvoltage switchgear. Access to the medium-voltage room is only allowed to authorized persons.
In the following the three mostly used types of stations are described. Deviating versions are possible due to differing requirements at the respective locations. If your tower and the ground station belonging to it deviate from the versions described here, they are a special version tailored to your requirements. The specification can be found in your contract documents or maintenance documents and need not be discussed here because it does not affect the actual functioning of the turbine. The functions of the substation are explained by the following drawings.
The safety instructions apply to all versions in the same way and must be observed by you, even if your tower / your ground station should deviates from the standard versions described here.
Towers and ground stations of the E-40
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