Adding column foundations
1.
Add or mold four steel reinforced concrete column foundations.
2.
Check locations and heights carefully. The tops of the foundation columns must be at
least 240 mm above the surrounding base ground.
3.
Place bitumen sheets on top of the foundation columns.
4.
If desired, you can add ground between the foundations. This will minimize the need
for post filling under the station later on.
1
2
5
4
3
800 mm
1
2260 x 5855 mm
2
600 x 600 mm (with 100 kPa loading capacity)
3
240 mm
4
Bitumen sheet
5
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Placing the inverter station on the foundation
WARNING!
Before lifting the unit onto the column foundations, check that the foundations are
well aligned, hardened and stable. Then follow the lifting instructions.
1.
Measure the level of the foundation and the tilting of the surface of the surrounding
ground around the foundation. Make sure that you obey the rules in section
the foundation for the inverter station (page 25)
. Do not place the inverter station too
low! Adding gravel around a inverter station which is placed too high is much easier
than reinstalling the inverter station.
2.
Check that the foundation is level. Maximum inclination of the foundation below the
inverter station is 0.1 degrees.
3.
Lift the inverter station onto the foundation. Obey the instructions in section
. Check that the column foundations do not move during lifting and that
they remain vertical. The inverter station must be stable and in direct contact with all of
the foundation columns.
4.
After placing the inverter station on the foundation, measure the height and inclination
of the inverter station again, and check the slope of the surface of the surrounding
ground around the inverter station. See section
Constructing the foundation for the
28 Mechanical installation