Installation Manual
16
comply with 4S2 classification criterion.
5.2.3
Foundation requirements
The inverter should be installed on a flat concrete foundation whose surface is made of
fire-resistant materials, and the foundation must meet the following requirements:
The degree of unevenness is <0.25% without any sinking.
The compression ratio should be 98%.
Soil stress needs to be 150kN/m
2
.
The foundation has a certain bearing capacity suitable for the weight of the inverter.
The foundation should be made of fire-resistant materials.
The foundation upper surface should be slightly higher than the ground surface to avoid
stagnant water after rains or snow melting.
During foundation construction, cable trenches should be reserved according to overall
plant design and cable routing on the bottom of the inverter.
Holes need to be designed on the foundation, and hole dimensions should be consistent
with those of the location holes on the inverter bottom, so that the inverter can be firmly
installed onto the foundation.
Six slotted holes of 16mm×25mm are designed on the inverter bottom, as shown in the
figure below (in mm). It is recommended to attach the inverter bottom to the foundation with
bolts of M12.
1227
820
744
B
A
B
Item
Description
A
Slotted hole
B
Cable entry
