34 Mechanical installation
Constructing the foundation
WARNING! The pit for the foundation and the foundation must be designed by an
experienced civil works engineer. Obey all local rules and regulations.
For detailed foundation drawings, refer to Dimension drawings on page 63.
To prevent the risk of corrosion, install the megawatt station higher than its surroundings to
prevent surface water from collecting around the megawatt station.
• Tilt the surface of the surrounding ground at least 50 mm per meter (2 in per 40 in).
This makes sure that surface water flows away from the megawatt station.
• When you plan the foundation, take into account the local conditions, such as the soil
type, frost protection, rain amounts, etc. An improper foundation can cause settling of
the megawatt station or difficulty opening the door.
• Take into account the required cable bending radius and installation room.
• ABB recommends that the service platform around the megawatt station is at least
one meter (40 in) wide.
Support the megawatt station from the points marked in the footprint layout drawing (refer
to Dimension drawings on page 63) by using concrete or steel column foundations. The
columns or concrete pad foundations are not part of the delivery.
Select the foundations to match the local soil conditions, the load carrying capacity of the
ground, and the potential local special requirements (such as the need for earthquake or
typhoon anchoring) of the construction area.
Start by making a deep enough hole for the foundation. Always dig down to a frost proof
depth and drain the hole. If it is necessary, connect the foundation hole to the general
drainage network or lead drainage pipes to a well-drained terrain where the water does not
cause harm.
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