4.3.2
Support surface
☐ The support surface must be a dry and solid foundation, e.g. gravel.
☐ In areas subject to strong precipitation or high groundwater levels, a drainage system must be implemented.
☐ Do not mount the MV Power Station into ground depressions to prevent water ingress.
☐ The support surface underneath the MV Power Station must be clean and firm to avoid any dust circulation.
☐ To facilitate accessibility for servicing operations, the maximum foundation height must not be exceeded. The
maximum foundation height is: 500 mm.
4.3.3
Pea gravel ground
Figure 13: Structure of the support surface
Position
Designation
A
Pea gravel ground
B
Solid ground, e.g. gravel
The subgrade must meet the following minimum requirements:
☐ The compression ratio of the subgrade must be 98%.
☐ The soil pressure must be 150 kN/m
2
.
☐ The unevenness must be less than 0.25%.
☐ Minimum clearances for servicing operations must be observed(see Section 4.1, page 19).
☐ Access roads and areas must be passable, without any obstructions, for service vehicles (e.g. forklifts).
4.3.4
Weight load
The weight load on each of the six support feet of the MV Power Station is 4000 kg.
The installation surfaces (e.g. strip foundations) are to be designed accordingly.
4.3.5
Mounting options
The MV Power Station can be mounted on flagstones, pile-driven steel pillars, concrete pillars, strip foundations or
foundation plate. The unevenness must be less than 0.25%.
The type of mounting foundation is the responsibility of the customer.
The service platforms must be taken into account when planning the support surface (see Section 4.3.6, page 26).
Earthquake and Storm Qualification
For the "Earthquake and storm qualification" order option, stricter requirements apply to the support feet and
foundations. The mounting and installation options described below are not adequate for these requirements. In
earthquake and storm areas, a foundation plate with additional reinforcement is recommended (see Section 4.3.5.5,
page 25). The foundation is the responsibility of the customer. It is still recommended to remove the protective roofs in
storm areas.
4 Information for Installation
SMA Solar Technology AG
Transportation and Installation Requirements
MVPS22JP-TA-en-20
22
Summary of Contents for MEDIUM VOLTAGE POWER STATION 1000-1SC-JP
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