Specifications

Shore Power
Shore power will connect to the AC distribution system via the AC supply selector
switch.
A galvanic isolator will be installed between the yacht’s hull and the shore side electrical
earth system.
Provision will be made for connection to a 50 amp shore power supply via an isolating
transformer located in the engine room. Primary input tapings will allow inputs from
208/210/220/230 V single or two phase shore supply with an output of 220V, 3 wire,
suitable for 50Hz operation.
A 63 amp 3 pole + earth shore power inlet, IEC 309 configuration, fitted with RCD circuit
breaker with a degree of protection of IP 55 will be installed in a dedicated cockpit
locker. Plug to be suitably connected to the vessel
One 20 metre flexible shore power lead complete with cord connector and plug top is to
be provided.
Inverter
One Mastervolt Mass 24/3500 230 volt, 50Hz, 2500 watt continuous rated inverter is to
be installed. It will be supplied via slow blow 160 amp fuses from the 24V DC services
battery and located as close as practical to the main DC distribution panel (DCDB 1).
The inverter output will supply selected circuits via an automatic AC mains fail switching
system.
10.8. DC Power Supplies
The following low voltage DC systems will be installed:
24 volt DC General Services. 12 volt DC
Navigation and Services. 12 volt DC Engine
Start and Control.
These systems will all be two wire insulated from ground.
All batteries will be the gel cell type installed to meet the manufacturer
recommendations with adequate means of restraint and maintenance access.
An isolating switch will be placed as close as practical to each battery plus an
emergency parallel switch is to be installed between the main engine start battery and
the service batteries.
Service Batteries
1 x 24 volt services battery bank rated at minimum 800 amp hours will be installed
according to the designers plans.
Batteries are Sonnenschein SB6/200A, 16 off required.
Navigation and Service Batteries
1 x 12 volt navigation and services battery bank rated at minimum 180 amp hours will be
installed according to the designers plans. Battery is a Sonnenschein A 412/180A, 1 off
required.
Start Batteries
This battery will be used to start both the engine and genset.
1 x 12 volt engine start battery bank rated at minimum 180 amp hours will be installed
according to the designers plans.
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