Amel FR-AML SM, Руководство пользователя

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User’s guide
1-5
1.1.3 Ground circuit and protection against electrolysis
All the equipment in contact with water (pumps, engines, pipes, transmission, propeller,
toilets, …) are connected together to make a circuit, isolated from the other wires but linked
to the zinc anodes of the rudder.
This installation (green / yellow wire) represents a protection against the electrolysis :
anodes break up, but not the item being protected.
Warning : inspect anodes every 6 months.
Change anodes every year, maybe more often. Electrolysis depends on the environment of
the boat, ands especially if there is a metal boat close-by.
The Super Maramu 2000 has got in standard 2 ground plates on the rudder, used by the
SSB system.
If the boat hasn’t got any SSB, these plates are connected to the zinc anodes.
When setting up a SSB, disconnect ground plates of the anodes (behind the chart table).
When a new metallic material in contact with water is installed :
- be sure the alimentation wires (positive and negative) are isolated,
- link the metallic part to the ground circuit.
Maybe after having set a new electrical appliance, the mass circuit isn’t perfectly insulated
anymore from the 24 V positive or negative. Some electrical leaks and damages on the
appliances, equipment, seacocks or components of the boat linked to the mass circuit can
appear.
A leak detector is installed on the companion way’s bulkhead. You can search for an
electrical leak on the inside electrical circuit of the boat (but not on the electrical circuit of the
masts).
To use it, push the switch to “Masse +” position : if the light is on, it means that the mass
circuit is linked to the positive circuit of the boat; if nothing is on, push the switch in the
“Masse –“ position : if the light is on, it means that the mass circuit is linked to the negative
circuit of the boat.
In the case of a light on, the leak must be find and suppressed.
The leaks must be looked for at least twice a year, or more if necessary : if you see that your
anodes break up fast, if you have some metallic boats as neighbours, if you set a new
electrical appliance (computer, antenna, pump, radio, …) or to confirm electrolysis
symptoms.