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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
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.
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
106
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 BATSW250
is a suitable switch, which is also available
in a 2-pole version, VETUS part number
BATSW250T.
5.4
Fuses
Main power fuse 1, see page
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.
22
020817.01
106
for the applicable battery capacity.
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112
For all fuses we can suppy a fuse holder, VETUS part no.: ZEHC100.
See page
106
for the size of the fuse to be used.
5.5
Connecting the main power cables and config-
uring the bow and/or stern thruster
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.
• Take off the cover.
• Feed the battery cables through the input glands in the cover.
• Apply cable terminals to the battery cables and connect the ca-
bles to the motor controller.
Make sure that the cable terminal on the negative cable cannot
cause a short circuit to the lowest of the three motor connecti-
ons on the controller!
The tightening torque of bolts in the motor regulator is a
maximum of 10 Nm (7 ft-lbf).
The drawing shows how the cables must be laid in order for the
cover to be replaced again.
Make sure that the voltage stated on the motor type plate is
identical to the boat's power supply voltage.
12 V
For connection diagrams, see also page 112.
To allow the bow thruster or stern thruster to be distinguished
on the CAN bus, these must be configured appropriately.
Installation manual BOW PRO Series Thrusters: BOWA0401
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8 - 10 Nm
(6 - 7 ft-lbf )
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