The Power Supply; Choice Of Battery; Main Power Cables (Battery Cables) - Vetus BOW28548 Manuel D'utilisation Et Instructions D'installation

The power supply

Choice of battery

The total battery capacity must be sufficient for the size of the
bow thruster; see the table. We recommend Vetus maintenance
free marine batteries; these can be supplied in the following
sizes: 55 Ah, 70 Ah, 108 Ah, 120 Ah, 143 Ah, 165 Ah, 200 Ah
and 225 Ah.
We also recommend that each bow thruster is powered by its
own separate battery or batteries. This allows the battery bank
to be placed as close as possible to the bow thruster; the main
power cables can then be short thus preventing voltage losses
caused by long cables.
Always use batteries whose type and capacity are compatible
for their use.

Main power cables (battery cables)

The minimum diameter must be sufficient for the bow thruster
in use and the voltage drop must not be more than 10% of the
voltage supplied; see the table.
A main switch and fuse must be fitted in the 'plus' cable. A
Vetus battery switch is suitable here. The fuse protects the bow
thruster against overvoltage and at the same time protects the
vessel's wiring against short-circuits.
Fuse
A suitable fuse is available for the bow thruster, see table. We
can also supply suitable fuse holders for all fuses, Vetus art.
code: ZEHC100.
Bow thruster
Mini-
mum
Recom-
mended
285 kgf, 48 V
Maxi-
mum
The series battery circuits above are achieved using a series/
parallel switch.
Consult the instructions provided with the series/parallel switch
on how to install these.
16
020569.01
Battery capacity required
143 Ah-12 V 143 Ah-12 V 143 Ah-12 V
143 Ah - 48 V
200 Ah-12 V 200 Ah-12 V 200 Ah-12 V
200 Ah - 48 V
120 Ah-12 V 120 Ah-12 V 120 Ah-12 V
120 Ah-12 V 120 Ah-12 V 120 Ah-12 V
240 Ah - 48 V
(2 x BCI 31 A -750)
The maximum operating time and the thrust as speci-
fied in the technical details are based on the recom-
mended battery capacity and the battery connection
cables, see the 'Installation instructions'. If appreciably
larger batteries in combination with very short con-
nection cables with appreciably larger diameter than
recommended are used then the thrust will increase.
In such cases the maximum operating time must be
reduced in order to prevent damage to the motor.
In extreme cases, for example when a battery with a
capacity of five times or more than suggested is used,
there is the danger of causing permanent damage to
one or more of the following shaft connections:
- The connection between motor shaft and the tail
piece input shaft.
- The connection between the tail piece output shaft
and the propeller.
Total
length of
plus- and
minus
cable
143 Ah-12 V
200 Ah-12 V
0 - 46 m
0 - 151 ft
120 Ah-12 V
120 Ah-12 V
Operation manual and installation instructions Bow thruster 285 kgf, ø 300 mm
IMPORTANT!
Fuse
Cable
cross-
'slow Vetus art.
section
blow'
95 mm 2
355 A
AWG
000
code
ZE355