Iveco Marine Diesel Engines, Installation Handbook

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MARCH 2004 ELECTRICAL INSTALLATION
12.111
MARINE ENGINES INSTALLATION
12.1 OVERVIEW
With the advent of engines electronic control and injection systems, electronic equipment has gained
fundamental importance.The application of such systems, since they have contributed to the improve-
ment of the engine performance, makes ship owners to comply with certain essential quality standards.
Therefore, installations shall be carried out following strictly the instructions supplied by IVECO and the
companies that supply the equipment and system components.
To offer dockyard personnel and ship owners a vast range of layouts, the electrical equipment has a
series of alternative installations.
The use of components with “isolated poles” or with negative insulated from the ground connexion will
guarantee a more effective protection against galvanic corrosion avoiding circulation of operating cur-
rents on the engine block; which is to be connected to the vessel ground connexion (see figure 1B).
According to the engine type and version, the electrical installation may be powered by 12V or 24V.
The installation powered by 24V may facilitate the engines startup in cold climates and on a discontin-
ued engine startup basis.
General warnings for on board electrical installation:
■
DO NOT USE the engine equipment wiring to power other electrical equipments on the vessel.
■
SET the electrical wiring separated from other circuits.
■
DO NOT USE battery circuit breakers to stop the engine.
■
PAY PROPER ATTENTION to the wiring polarisation and to the correct attachment of its fasten-
ing parts.
■
FOLLOW instructions to carry out the wiring and the electrical connexion.
12.2 POWER CIRCUIT
Connect with two independent lines the storage battery to the electrical start-up motor, and to the
connexion electronic preheating system as well as to the EDC installation, if present.
The +B alternator terminal connexion to the +30 positive terminal of the start-up electrical motor is
to be carried out with a 16 mm
2
conductor or a larger one.
The +30 positive terminal connexion from the startup electrical motor to the storage battery positive
pole is to be carried out with a conductor
≥
50 mm
2
, for a 24 V voltage supply, and with a conductor
≥
70 mm
2
for a 12V voltage supply.
Similar conductors shall be used for the connexion of negative terminals and/or engine ground con-
nexion. In case the installation requires the batteries to be fitted far from the engine, it is advisable
to use larger conductors and to control that the accumulator poles have the proper voltage value
(from 12.8 to 14.5 V) (see figure 1).
The protection parts with thermomagnetic switches or the battery circuit breaker cannot be used to
stop the engine, and if necessary, its connexions will remain opened for only some seconds after the
engine stop.
IVECO provides, together with the engines technical data, the basic instructions only for the engine
power circuit; the dockyard personnel/ship owners are responsible for the batteries electrical dimen-
sioning and for the entire vessel electrical circuit.