GENERAL INSTRUCTIONS FOR CTC
UNDER POLE COMPACT
TRANSFORMER SUBSTATION
IG-086-GB
version 02
11.07.2007
Page 11 of 20
3.5. LEVELLING
PROCESS
Levelling the ground is important for the correct installation of the enclosure.
The following tools are necessary:
•
1 Bubble lever
•
1 Square shovel
•
8 Levelling tools
It is necessary to cover the base of the pit with a 100 mm thick layer of compacted and
levelled sand to avoid an uneven base.
The installation operation involves positioning the
CTC
TS in the excavation made for this
purpose and connecting the LV and MV cables, as well as the external earthing circuit.
VERY IMPORTANT:
For installations on sloping ground, consult Ormazabal’s Technical – Commercial
department.
INSTALACION DE TIERRA
SEGUN LOS VALORES DE
TIERRA OBTENIDOS EN
EL PROYECTO
ARENA COMPACTADA
TIERRA COMPACTADA
RELLENO COMPACTADO
INCLINACION 2 %
Figure 3.4
:
Excavation elements
Earth circuit installation
using the earth values
obtained in the project
Compacted sand
Compacted soil
