Vetus BOW PRO B Serie Manuel D'installation page 22

ENGLISH
5 Electrical installation
5.1 Choice of battery
The total battery capacity must be sufficient for the size of the bow
thruster; see the table. See page 114 for the applicable battery capacity.
The minimum battery capacity is specified in the table; with a lar-
ger battery capacity, the bow thruster will perform even better!
We recommend VETUS maintenance free marine batteries; these can
be supplied in the following sizes: 55 Ah, 70 Ah, 90 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.
Be sure to only use 'sealed' batteries if the batteries are located
in the same compartment as the bow thruster.
VETUS 'SMF' and 'AGM' maintenance-free batteries are ideal for
this application. Batteries that are not 'sealed' may produce small
amounts of explosive gas during the charging cycle.
MCVB boosted charge function
Using the MCVB boosted charge function, the 48 Volt motor can be
used in an (existing) 24 V on-board power grid.
By connecting the 24 Volt battery bank to the MCVB boosted char-
ge connection, the 48 Volt, battery bank is charged. An additional
charging facility is not required. See page 113 for the connection
diagram.
As a standard, the MCVB boosted charge function is only suitable
for Lead acid batteries
5.2 Main power cables (battery cables)
The minimum diameter and battery capacity must be sufficient for
the bow thruster's current draw in use. Consult the table on page
114 for the correct values.
The maximum operating time and the thrust, as specified by
the technical details in your bow thruster installation and op-
erating manual, are based on the recommended battery ca-
pacities and battery connection cables.
5.3 Main switch
see page 112
The main switch must be fitted to the 'posi-
tive cable' . The VETUS battery switch type
BATSW600 is a suitable switch.
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5.4 Fuses
Main power fuse 1, see page 112
A fuse must be included in the 'po-
sitive cable' for the main switch, as
close to the battery as possible.
This fuse protects the on-board po-
wer cabling from short circuits.
For all fuses we can suppy a fuse holder, VETUS part no.: ZEHC100.
See page 114 for the size of the fuse to be used.
When replacing the fuse, the replacement must be of the
same rating.
5.5 Connecting the main power cables and config-
uring the bow and/or stern thruster
For connection diagrams, see also page 112
Make sure that no other electrical parts come loose when con-
necting the electric cables.
Check all electrical connections after 14 days. Electrical parts
(such as bolts and nuts) may come loose as a result of fluctua-
tions in temperature.
1
2
2 x M8
13
8 - 10 Nm
(6 - 7 ft.lbf )
Be careful not to rotate the bolt and nut 1 while connecting the
cables. To prevent this happening, keep an open-ended spanner
on nut 1 while screwing on bolt 2, without rotating this spanner.
The torque for nut 2 is 8 - 10 Nm (6 - 7 ft.lbf ).
• Apply cable terminals to the battery cables and connect the ca-
bles to the motor controller.
The tightening torque of bolts in the motor regulator is a
maximum of 10 Nm (7 ft-lbf).
Installation manual BOW PRO Series Thrusters: BOWB385 - BOWB420
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48 Volt
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