Iveco Marine Diesel Engines, Installation Handbook

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MARCH 2004 ELECTRICAL INSTALLATION
12.115
MARINE ENGINES INSTALLATION
12.4 STORAGE BATTERIES
The storage batteries must be properly sized to provide the appropriate current intensity to the elec-
tric engine startup and to the other engine electric uses.
Should the vessel have electrical equipment with non-rotating motor, two different storage batteries
assemblies should be installed, each one for the engine and the auxiliary services.
Guarantee good ventilation of the storage battery compartment to avoid temperature rise and for-
mation and accumulation of dangerous burning gases.
Storage batteries contain a highly caustic and corroding water and sulphuric acid solution; therefore,
they must be handled very carefully to avoid accidental spillage. Once replaced, they must be sent to
an appropriate waste-recycling centre.
The alternator characteristics and the indications on discharge capacity of storage batteries are detailed
in the technical instruction chart of each engine.
Storage batteries recharge
The storage batteries recharge is accomplished by the alternator through the power circuit; the equip-
ment electronic regulator ensures an effective control of the recharge parameters.
The led indicator powered by the regulator and generally fitted on the on-board panel
does not
show the storage battery recharge real status, which depends completely on the maintenance con-
dition and age.
The storage battery recharge for the auxiliary services, not electrically connected to the engine stor-
age battery, may be managed by a relay. The relay excitation is produced by the recharge signal of the
(D+) alternator electronic regulator, in the single engine installations (see figure 7), or by the second
engine alternator.
If more electrical power should be needed to attain appropriate vessel equipment running conditions,
supplementary alternators can be used. Installing generating-set has become very common, even in the
case of small vessels.
Installation and testing instructions:
■
Respect the connexions polarity, especially the ones in the batteries.
■
Avoid short circuit on the alternator or regulator terminals.
■
Do not disconnect the battery while alternator is rotating.
Alternator can cause disturbances to on-board equipment and instruments due to electromagnetic
interferences.Therefore, carry out timely compatibility controls.
Figure 6