A
DC-DC converter is a converter used in a
12V or 24V battery system. It has two main
functions: either to convert the 24V from
the onboard power system to supply 12V
consumers such as navigation and
communication equipment, or to stabilize
the 12 or 24V onboard system. With the
Mastervolt converter you can opt for a 24V
main battery in any situation, without
limiting your use of 12V appliances.
Mastervoltís range also includes
converters that can change 12V into 24V as
well as functioning as a voltage
stabilizer, to keep the onboard system at
a fixed 12 or 24V DC voltage.
Navigation, communication, and
sound equipment will run smoothly, with
minimal energy loss due to the switch mode
technology applied. |
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Using a Mastervolt
converter eliminates the need for a so-called
linear converter. The linear method has a low
efficiency (<50%), limited safety for connected
appliances and a poor quality DC output voltage.
In contrast, Mastervolt's switch mode (high
frequency switching technique) ensures your
power system is much safer, reliable and efficient.
Mastervolt recommends using a 24V system on
all vessels of 13m or longer. Using 24V means
the cables can be thinner (lighter in weight,
lower in cost), improves output and allows for
the installation of heavy duty power consumers
such as a bow propeller.
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The converter
can be used in the following ways:
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For
converting 24V into 12V DC, without
battery charger function. To supply
navigation, telephone and communication
equipment, sound installations,
etc. These appliances are all
connected to a special 12V group. |
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For
converting 24V into 13.6V DV,
with battery charger function.
Same application as above, with
the 12V appliances connected to
a 12V battery. |
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For
converting 12V into 12V DC in
order to stabilize it, without
battery charger function. To supply
navigation/communication equipment
and halogen lighting. |
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For
converting 12V into 24V DC, with
or without battery charger function.
To supply navigation/communication
equipment, stabilization, safeguards
appliances. |
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For
converting 24V DC to 24V DC for
stabilization, with or without
battery charger function. For
stabilizing voltage (i.e. for
halogen lighting) and for galvanic
isolation. |
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Simple
converter models have a common
negative - which does not filter
all disturbances. If you want your
converter to be completely safe
and a guarantee that the DC/out
won't be affected by interferences
in the supply (= the DC/in), a
converter that is isolated both in
the DC plus and DC negative line.
The input and output are not
connected to each other.
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Click
picture to enlarge
Example of an ideal,
safe converter (models
8862, 8770, 8771,
8772): the DC output
remains stable,
independent of DC
input.
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Click
picture to enlarge
Model 8661, converts
24V into 12V DC:
Voltage flow from
Volt/in to Volt/out.
If the input is too
high, the DC output
will be increased to
the same extension.
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Mastervolt
converters are available in three
different versions:
compatible
with all DC power consumers and
suitable for use as automatic
float charger for 12V starter or
navigation batteries, as well as
batteries supplying lighting and
bow propeller. Model 8870. Also
available with galvanic isolation,
see models 8862, 8771 and 8772.
produces a
stable output voltage, even when
input is fluctuating. This is the
best and safest type of converter
to use if you don't need it for
charging batteries. Also available
with galvanic isolation.
This is the
simplest and most cost-effective
type of converter.
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Model
|
8860 |
8861 |
8862 |
8660 |
| Part# |
08-10-21060 |
08-10-21061 |
08-10-21062 |
08-10-12080 |
| Input
Voltage |
24V
DC |
24V
DC |
24V
DC |
12V
DC |
| Output
Voltage |
12V
DC |
12V
DC |
13.6V
DC** |
24V
DC(1) |
| Power
cont. 30°C |
110W |
110W |
132W |
120W |
| Output
Current |
8A |
8A |
8A |
8A |
| Galvanic
isolation* |
NO |
YES |
YES |
NO,
OPTIONAL |
| Efficiency |
87% |
87% |
85% |
81% |
| No-load
consumption |
100
mA |
100
mA |
90
mA |
300
mA |
| Electrical
protection |
Total
full proof electronic protection,
also from short circuit and overload |
| Parallel
connection |
NO |
NO |
YES |
YES,
if used as galvanically isolated |
| Casing |
Aluminum
profile, anodized, protection degree
IP20 |
Dimensions
h x w x d (inch) |
1.8
x 4.7 x 5.3 |
1.8
x 4.7 x 5.3 |
1.8
x 4.7 x 5.3 |
2.8
x 4.1 x 8.7 |
| Weight |
1.3
lbs |
1.3
lbs |
1.3
lbs |
2.2
lbs |
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(1)
24V when connected in series, with galvanic
isolation of input voltage, or 12V output
voltage
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Model
|
8861 |
8770** |
8771 |
8772 |
| Part# |
08-10-21120 |
08-10-21200 |
08-10-22110 |
08-10-22210 |
| Input
Voltage |
24V
DC |
24V
DC |
24V
DC |
24V
DC |
| Output
Voltage |
12V
DC |
13,6
V DC*** |
24
V DC*** |
24V
DC*** |
| Power
cont. 30°C |
180W |
300W |
300W/24V |
580W/24V |
| Output
Current |
12A |
20A |
10A |
20A |
| Galvanic
isolation* |
YES |
NO |
YES |
YES |
| Efficiency |
82% |
94% |
93% |
93% |
| No-load
consumption |
200
mA |
30
mA |
115
mA |
115
mA |
| Electrical
protection |
Total
full proof electronic protection, also
from short circuit and overload |
| Parallel
connection |
NO |
YES |
YES |
YES |
| Casing |
(see
above) sheet
steel casting + internal connections, IP20 |
Dimensions
h x w x d (inch) |
2.8
x 4.1 x 8.7 |
3.9
x 3.9 x 3 |
9.8
x 7.9 x 4.3 |
9.8
x 7.9 x 4.3 |
| Weight |
2.2
lbs |
3.7
lbs |
7.7
lbs |
7.7
lbs |
*
Galvanic isolation keeps the DC output
completely separate from the DC input/battery.
** Parallel switching for higher ratings
40/60/80/100A
*** Stabilized output voltage
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