The Power Supply; Choice Of Battery; Main Power Cables (Battery Cables); Main Switch - Vetus BOW2512D Instructions De Montage

8

The power supply

8.1

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 ma-
rine 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.
Be sure to only use 'sealed' batteries if the batteries are locat-
ed in the same compartment as the bow thruster.
The Vetus 'SMF' and 'AGM' maintenance-free batteries are ideally
suited to this application.
Batteries that are not 'sealed' may produce small amounts of ex-
plosive gas during the charging cycle.
Sparks generated by the carbon brushes of the bow thruster
motor may ignite this explosive gas.
Always use batteries whose type and capacity are compatible for
their use.
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.
8.2

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 sup-
plied, consult the table in your bow thruster installation and operat-
ing manual.
The maximum duration of engagement and the thrust, as
specified by the technical details in your bow thruster instal-
lation and operating manual, are based on the recommended
storage battery capacities and storage battery connection
cables.
If appreciably larger batteries in combination with very short
connection 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.
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8.3

Main Switch

A main switch must be included on the 'positive cable' .
A Vetus battery switch is a very suitable choice. Consult the following
table for the correct type of battery switch.
Vetus Battery Main Switch
Thruster
Art. code:
'BOW . . 12D'
25
35
45
BATSW250
55
60
75
95
BATSW600
125
The BATSW600 can be used as a battery main switch for the
BOW28548D bow thruster.
BATSW250
The BATSW250 is also available with two poles, (Vetus art. code
BATSW250T).
Main switch with remote control
Instead of a storage battery main switch, a remotely controlled main
switch annex emergency stop can be installed.
This remotely controlled main switch is available for 12 or 24 Volt di-
rect voltages.
Vetus art. code: BPMAIN12 respectively BPMAIN24.
NOTE:
When using a series-parallel switch, the main switch must be suitable
for the voltage onboard.
Use a 12 Volt main switch if a 24 Volt bow thruster has been con-
nected in combination with a series-parallel switch to a 12 Volt on-
board network.
vetus® Installation recommendations for thrusters
Thruster
Art. code:
'BOW . . 24D
55
60
BATSW250
75
95
125
160
BATSW600
220
BATSW600