MARLOW-HUNTER MH31, Руководство оператора

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DC Electric Systems
7.8
mounted on the inboard face of the engine compartment/
companionway bulkhead to the immediate right of the
BSP (Fig. 7.5).
7.2.10 Generator
The optional generator supplies AC power to the boat.
However, as with the boat engine, the generator engine
requires power from the DC system to start and is con-
sequently briefly mentioned here. For a full discussion
of the optional generator system, please refer to the AC
Electrical Systems section of this manual.
7.2.11 Grounds and Zincs
The negative ground system incorporates busbars in
various locations within the boat (Fig. 7.15). These are
identified by the congregation of yellow (negative) wires
attached to the bar. All electrical circuits require a ground,
and they are joined in sections at these busbars.
Figure 7.15
Sacrificial zinc anodes are included within some compo-
nent assemblies to protect them from the effects of gal-
vanic corrosion. Galvanic corrosion occurs primarily in
salt water but can occur to a lesser degree in fresh water.
Salt water allows electric current to flow from anodic to
cathodic material. Any two metals from two components
and their relative position in the galvanic rating table
will determine which metal loses material (anode) and
which metal remains largely undisturbed (cathode). The
distance apart in the galvanic table of the two metals
determines the rate of wear.
Consequently, zinc anodes are used as the sacrificial
metal allowing corrosion of the anodes but limiting cor-
rosion of the more costly underwater components. The
sacrificial zinc anodes are considerably easier and less
expensive to replace and their deterioration will not affect
the performance of your boat as would the deterioration
of any underwater components. The zinc anodes are
replaced on a periodic basis (see the Maintenance sec-
tion in this manual).
Important: DO NOT PAINT any part of the sacrificial zinc anode
as it will retard the flow of electric current through them and
render them less effective.
7.3 DC System Components and Operation
The majority of the controls for DC components are
located on the two master panels.
7.3.1 Battery Switch Panel (BSP) Controlled
Components
Please refer to the panel layout in Fig. 7.4 for reference
in the following discussion.
7.3.1.1 DC Main Breaker
As previously mentioned, the DCP is supplied power
through the BSP. The 50 amp breaker on the panel is
labeled “DC MAIN”. To operate the majority of the DC
components in your boat controlled from the DC Panel,
this breaker must be “ON”.
7.3.1.1.1 To Energize the Main DC Panel
Choose the source battery(ies) by positioning the
Battery Switch to “1” (Start Battery) or “2” (House
Battery) to provide power from one battery or posi-
tion the Battery Switch to the “1+2” position to supply
power from both batteries.
Toggle the “DC MAIN” breaker switch to “ON”.
7.3.1.2 Battery Charger Breaker
As mentioned previously, two 40 amp reset breakers exist
on the BSP labeled “BATTERY CHARGER OUTPUT
RESET”. Refer to the Battery Charger discussion above
for addtional details on these breakers.
7.3.1.3 Bilge Pump Breakers
The bilge pump system essentially consists of a main
bilge pump together with a high-water alarm component.
Additionally, an optional high water bilge pump is avail-
1.
2.