SDMO R 340 U User And Maintenance Manual page 118

Air preheating (Optional)
Turn the switch to "ON" to initiate preheating of the generating set.
In the case of a power plant, the position of the air preheating switches must NECESSARILY be the
same on all the switches of the generating sets in the power plant.
Important
Bi-frequency (Optional)
Turn the switch to the desired frequency and voltage.
Earthing system
Turn the switch to the desired earthing system.
The EDF earthing system is only used in the so-called rental configurations.
The switch must necessarily correspond to the wiring described in the section on "Connection of the
generating sets".
Important
AIR PREHEATING
OFF ON
FREQUENCY
50Hz
50Hz 60Hz
440V
400V 480V
EARTHING SYSTEM
TT
IT TN
1: IT
2: TN (TNS)
3: TT (TT or EDF APPLICATION)
116/285