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
Rod length (in
metres)
Rich arable land, moist compact hard
core
1
Poor arable land 1
Poor arable land, gravel, coarse hard
core
1
Stony bare soils, dry sand,
impermeable rocks
3.6
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.
• 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
DISJONCTEUR
N
R
ST
Ground
Ground rod
Interconnection
bar between
genset grounds
CIRCUIT
BREAKER
Current
transforme
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