|30 November 2011||Posted by Alex from Lagoon under Technical world|
Valerie and Laurent from the Lagoon 380 Letitgo sent me an email asking me “Why don’t you talk about the electrical system and basic principal wiring of the Lagoon 380?”.
So I tried to gather all the info to find a clear picture of the Lagoon 380 electrical system. Please come with me inside the technical world of this catamaran. As my old teacher said during an electricity course: “Don’t be afraid, catch a wire and follow it all the way to the end to understand its function!”.
Let’s start from the engine on the right side of the picture:
– If you take the positive wire from the starter motor (red one), it goes to the positive breaker B. This positive breaker has wires which go to the engine battery and to the battery charger.
– The battery charger has 2 other positive wires which go to the two other positive breakers A and D. It is also connected to the shore power plug.
– The positive breaker A goes to the house batteries, to the electrical panel by the way of the shunt, to the relay of the electrical winch and to the relay of the windlass.
– The positive breaker D has the same role for the left engine as the breaker B.
– To ground all the elements, the negative breaker C and E gather the negative wire.
So we understand where all the wires go. But do you know what each element can do?
– The starter motor is the device of the engine which launches it when you turn the key.
– The battery charger allows you to charge your batteries when you are connected to the electrical system of the harbour thank to the shore power plug.
– The electrical panel is one of the visible parts of this installation because it gathers all the switches of the different electrical elements of the boat (lights, electronics, vhf…)
– A breaker allows to isolate the electrical installation.
– A shunt is a copper bar which enables to connect a current meter to indicate the current consumption.
– A relay is a kind of switch which is controlled by electricity.
Missing on this picture are the wires coming from the alternator to the battery isolator which will charge the engine and domestic batteries.