Electrical Installation; Choice Of Battery; Main Power Cables (Battery Cables); Main Switch - Vetus PRO Série Instructions D'installation

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 151 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 ca-
bles can then be short thus preventing voltage losses caused by long
cables.
Always use batteries whose type and capacity are compatible for
their use.
5 .2

Main power cables (battery cables)

The minimum diameter must be sufficient for the bow thruster's cur-
rent draw in use and the voltage drop must not be more than 10% of
the voltage supplied, consult the table on page 151.
The minimum wire cross-section is given in the table; the bow thrust-
er will perform even better with a larger cross-section!
5 .3

Main switch

see page 29
The main switch must be fitted to the 'positive 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 29
In addition to the main switch and main relay, a fuse must be fitted to
the 'positive' cable as close to the battery as possible.
The fuse will protect the bow thruster from overloading and provide
short circuit protection for the on-board power system.
See page 151 for the size of the fuse to be used.
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020806.01
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 ex-
plosive gas during the charging cycle.
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 .
vetus® Installation instructions BOW PRO Series Thrusters: BOWA0651, BOWA0762 and BOWA0902
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