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System choice

The Volvo Ocean Race power system is divided into two clear sections:

MasterBus section,

including:

n

2 x MLI 24/5000, Lithium Ion battery;

n

2 x 24/150 A alternator;

n

2 x Alpha Pro charge regulator;

n

2 x Magic DC-DC converter 24/12-20;

n

1 x MasterBus USB Interface;

n

1 x Multipurpose Contact Output;

n

2 x 500 A safety relay;

n

1 x DC Distribution 500;

n

1 x MasterShunt 500.

CZone section,

including:

n

1 x Combination Output Interface (COI);

n

1 x Touch 5, touchscreen;

n

5 x Output Interface;

n

2 x Signal Interface;

n

1 x Meter Interface;

n

1 x CZone MasterBus Bridge Interface;

n

1 x CZone Network Bridge Interface.

What the system needs to power

and control:

n

Port and starboard water ballast pumps;

n

Sat C (satcom messaging and positioning);

n

All lighting (both internal and external);

n

Fleet broadband 250 and 500;

n

Cockpit and navigation MFDs;

n

LAN network;

n

B&G multifunctional displays;

n

Gas alarm;

n

Radar;

n

Bilge pumps;

n

Two onboard PCs;

n

VHF radio;

n

AIS (Automatic Identification System);

n

Watermaker;

n

Freshwater pumps;

n

Electric-hydraulic keel pump and PLC controls;

n

Media equipment for the onboard reporters.

SYSTEMS

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REFERENCES

1

2

Energy consumption

DESCRIPTION

POWER

NUMBER X POWER X TIME

DAILY CONSUMPTION

24 V DC consumers

Electric-hydraulic canting keel pump

2500 W 1 x 2500 watt x 30 minutes

= 1.250 kWh

Canting keel PLC controller

150 W

1 x 150 watt x 4 hours

= 0.600 kWh

Port and starboard water ballast pumps

1200 W 1 x 1200 watt x 30 minutes

= 0.600 kWh

Navigation & deck lights

60 W

1 x 60 watt x 6 hours

= 0.360 kWh

Cabin lights

30 W

1 x 30 watt x 6 hours

= 0.180 kWh

Watermaker

250 W

1 x 250 watt x 2 hours

= 0.500 kWh

12 V DC consumers

Communication (VHF, AIS, LAN, etc.)

150 W

1 x 150 watt x 12 hours

= 1.800 kWh

Navigation & media

150 W

1 x 150 watt x 12 hours

= 1.800 kWh

Total DC consumers

= 7.090 kWh

The total of DC consumers requires around 7.1 kWh. In this case, we chose for two MLI Ultra 24/5000

batteries in parallel, resulting in 10 kWh battery power. Totally discharging the batteries is not advisable

so opt for a maximum of 80 % discharge, i.e. at least 8 kWh.

Both sections are connected through a CZone MasterBus Bridge Interface and

collectively run the majority of the boats’ electrical requirements. The system

enables monitoring and control of just about everything though the CZone Touch 5.

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