4848
GENERAL INSTRUCTIONS FOR PF
MODULAR ENCLOSURES FOR
TRANSFORMER SUBSTATIONS
IG-021-GB
version 07
29.08.2008
Page 11 of 48
Landfill or vegetal matter
Hard ground
0 Level
Minimum level
100
B) Sloping Grounds
The excavation should be prepared in such a way that the base platform is on a hard
area.
In these cases, it is essential that rainwater from the higher ground be channelled, to
avoid it washing the ground away from under the enclosure.
If there are any doubts concerning this subsequent channelling, it is best to use a
mixture of sand and cement when levelling the ground.
Example:
100
650
Dimensions in millimeters
Figure 3.2:
Sloping Grounds