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ENERCON E-40 Operation instructions
Page 37 of 96
4 T
OWERS AND GROUND STATIONS OF THE
E-40
The E-40 is supplied with either steel or reinforced concrete towers of the following versions (see also section 11.1.2 "Tower specifications"):
steel tower with a length of 42 m (hub height 44 m)
steel tower with a length of 44 m (hub height 46 m)
steel tower with a length of 53 m (hub height 55 m)
steel tower with a length of 63 m (hub height 65 m)
reinforced concrete tower with a length of 42 m (hub height 44 m)
reinforced concrete tower with a length of 48 m (hub height 50 m)
In the past, other tower versions were also used. To find out your tower version, please check your contract documents.
4.1 Steel tower
Apart from different tower lengths, there are also differences with regard to the arrangement of the electrical installations, e.g. the transformer, the medium-voltage switchgear, the low-voltage connection and the power and control cabinets.
The transformer, the medium-voltage switchgear and the low-voltage distribution are normally located in a ground station next to the tower. For some towers (44 m,
55 m steel tower) it is also possible to locate this equipment in the cellar of the tower below the actual tower base. The power and control cabinets are installed in the tower base. Depending on the size of the tower, either all the cabinets are installed at the lowest level, or only the control cabinet is at the lowest level, whereas the power cabinets are arranged on the first platform.
If the wind energy converter is equipped with a remote monitoring system, the computer for this system is located in a separate cabinet in the tower.
The tower can be entered by a door provided with a safety lock. The safety ladder for climbing up to the nacelle is inside the tower. Also inside the tower are the control and power cables via which the nacelle is electrically connected to the ground station.
The cables are guided through the basement to the transformer and switchgear station. The basement can be accessed via a hatch in the floor.
For climbing and for maintenance work, lighting is provided inside the tower over its whole length. The standing platforms mounted on the inside of the tower allow the persons climbing up to rest at certain intervals. The standing platforms are also used by the maintenance personnel for checking and servicing the tower flange connections.
In steel towers, control and power cables are guided over a pulley below the nacelle in order to ensure sufficient freedom of motion for twisting due to nacelle movements. Below the pulley the cables are fastened to the inside of the tower wall with plastic clamps.
Towers and ground stations of the E-40
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