Earthing System (Standard Only) - SDMO R 340 U User And Maintenance Manual

6.3.5.3.

Earthing system (Standard only)

•
The ground of the generating set must be connected to earth. To do so, use a copper cable (Green / Yellow), 25 mm² minimum
for a bare cable and 16 mm² for an insulated cable, connected to the earth of the generating set, and to a ground rod of
galvanised steel pushed vertically into the ground.
For a fault voltage of 25 V and a fault current of 30 mA.
Nature of the ground
Rich arable land, moist compact hard
core
Poor arable land
Poor arable land, gravel, coarse hard
core
Stony bare soils,
impermeable rocks
•
Check the earthing connection before switching on the generating set.
•
Check that the safety earthing system is working.
Single genset
Earthing system: IT
Active isolation controller
Rod length (in
metres)
dry sand,
3.6
Interconnection
bar between
genset grounds
transformer
Ground
1
1
1
To obtain an equivalent length several ground rods can be
used connected in parallel and separated by at least their
length. Example: Four 1 metre rods interconnected and
separated by 1 metre respectively.
Isolated neutral
DISJONCTEUR
BREAKER
Current
N
Ground rod
79/285
CIRCUIT
R S T