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PowerDistribution
flowchart-elk TB
subgraph HouseBank
Battery1["Battery 1"] ---|500A| LynxPower
Battery2["Battery 2"] ---|500A| LynxPower
end
subgraph Distro1["Lynx Distro 1"]
Fuse1-1[120A] --- Windlass
Fuse1-2[40A] --- Cerbo
Fuse1-3[120A] --- Winch
Fuse1-4[300A] --- ChargerFuse
end
subgraph Distro2["Lynx Distro 2"]
Fuse2-1[40A] --- MPPT2
Fuse2-2[40A] --- MPPT1
Fuse2-3[40A] --- Watermaker
Fuse2-4[250A] --- Distro3Fuse
end
subgraph ShorePower
AC-IN --- Quattro
end
ChargerFuse --- Quattro
subgraph DistroNavDesk["Lynx Distro 3 (Under NavDesk)"]
FuseND-2[250A]
FuseND-1[250A]
FuseND-3[120A]
end
Distro3Fuse --- DistroNavDesk
subgraph PortEngine
PortPowerBus ---|40A| OrionDCDC --- PortStartBattery["Start Battery"]
PortPowerBus ---|40A| EngineOnRelay ---|5A| WS500
WS500 ---|5A| Alternator((Alternator)) --- FuseAlt[150A] --- PortPowerBus
end
subgraph StarboardEngine
StarboardPowerBus[/Same As Port/]
end
subgraph DIN
HouseMain[120A TB] --- BreakerPanel[Distribution Panel]
end
LynxPower --- LynxShunt ---|500A| Distro1 --- Distro2
FuseND-2 --- StarboardPowerBus
FuseND-1 --- PortPowerBus
FuseND-3 --- DIN
The LynxPower combines both batteries to the primary house bus. The batteries have internal 500A Class T fuses and are software limited to 400A each. The LynxShunt contains an additional 500A class T fuse. The LynxShunt is not used by the Cerbo for battery measurements. It was added for its internal 500A fuse and to provide an emergency backup in case of BMS failure.
Each LynxDistro (3 total) contains 4x Mega fuses feeding high current branch circuits. Spare fuses are located in the starboard lounge locker. A blown Mega fuse will be indicated by an alarm on the Victron touch display and a red (vs green) led on the affected Distro unit. LynxDistro1 and 2 are located beneath the salon settee. LynxDistro3 is beneath the navdesk. LynxDistro2 has a 400A Mega fuse to protect the cable between Distro2 and Distro3. Distro3 branches to MRBF fuse blocks in each engine room.
Each high current circuit may be further branched into lower current circuits. High inductive loads (Windlass, Winch) are further protected by a thermal breaker (TB) sized to blow before the Mega fuse to make resets easier after the fault is cleared. Smaller loads are fed through a thermal breaker on the DIN rail then to the breaker panel. After each breaker, further branches may be protected by ATC fuse blocks located near the loads. Locations and amperage ratings of the fuses are documented in the appendices.
High current appliances (Quattro, Windlass, Winch, Watermaker) are terminated directly to the Lynx Distro units. Lower current devices are terminated to a 35mm DIN rail located just forward of the navigation desk. DC power is fed from Distro 3 with a 150A Mega fuse, followed by a 120A thermal breaker on the DIN rail, then to a BEP millennium distribution panel. Breakers in the distribution panel then feed back to circuits on the DIN rail. A key for the DIN rail is in the appendices and posted on the DIN cabinet door.
The distribution panel has 44 breakers. Breakers are arranged in 3 columns, roughly left to right are Port, Salon, and Starboard devices with a few exceptions. A key to breaker numbering and amperage ratings is in the appendices.
Sintered bronze bonding plates are located on the outer side of each hull. The plates are connected to the negative busbar in each engine room. The busbar, engine, shaft, and prop are electrically bonded. There are 30mm id shaft zincs on each shaft.
Wire to wire connections (DC, low current only) are made with Deutsch DT or DTP connectors with the female connector on the source size and male on the equipment side. Additional connectors can be sourced from Deutsch Connectors or Digikey.
| Series | Wire Size | Amps |
|---|---|---|
| DTM | < 1mm2 | ? |
| DT | 1-2.5mm2 | 12 |
| DTP | >= 4mm2 | 20 |
Wire to wire splices (1 to many) are made with ring terminal blocks. Low current ring terminals are Ancor insulated with adhesive heat shrink and terminal blocks are Blue Seas 25xx (30A) series. Secondary fuse blocks (which use ring terminals) are Blue Sea Systems ST Blade series. High current ring terminals are Ancor uninsulated with adhesive heat shrink sleeves added.
The connection from the Garmin ECU and the Octopus LAM drive unit is made with Anderson PowerPole PP45 connectors in a 4x weatherproof boot to accommodate higher current (40A). Both the primary and spare drive units are wired identically to make it easy to swap. PP45 connectors and boot were sourced from Powerwerx