MaxPower CT60 Anleitung zur Fehlerbehebung PDF herunterladen (Seite 9)

English Manual: Super Power Series 60-80 25/03/2004

14 FUSE

Sizing of fuses for overcurrent protection are a function of the cable sizes in the circuit, not the

amperage drawn by the appliance (thruster motor) in the circuit. The current carrying

capability (ampacity) of this cable is determined by referring to the appropriate cable

datasheet, and then a fuse is chosen with a ratio no higher than this (it can be lower). If there

is not an exact match between cable ampacity and available fuse ratings, an overcurrent

device (for example a fuse) with a rating of up to 150% of the ampacity of the cable can be

used, but that’s the limit.

After choosing the required fuse size verify if thruster motor current(given below) is not to big

for the fuse, thus causing nuisance blowing of the fuse. If fuse is found to be to small for

motor current a bigger cable and fuse size need to be used.

Series/V Amps Series/V Amps

60/12 415 60/24 240

80/12 490 80/24 285

15 TESTS

UNDER NO CIRCUMSTANCES SHOULD THE THRUSTER OR ITS MOTOR BE ACTIONED WITH

THE BOAT OUT OF THE WATER.

THE TESTS MUST BE CARRIED OUT WITH THE BOAT IN THE WATER, AND THE BATTERY (IES)

AT 100% CHARGE; ENGINES RUNNING AND THE CHARGING SYSTEM AS PER NORMAL

OPERATION.

16 ELECTRICAL MEASUREMENTS

In normal “use” configuration for, i.e. thrusters running, yacht in the water, with fully charged

batteries receiving a charge (alternator). Electrical measurements should be made at the

following points:

At the batteries

At the battery cut off switch

At the fuses

At the motor’s connections

At supply arriving at thrusters control box

These measurements will able you to detect voltage drop. The voltage read should be of

approximately 11 volt for a 12-volt system and 22 volts for 24-volt system.

Should the voltage measured be too low the following points need to be checked:

Insufficient battery capacity

Bad battery quality

Insufficiently charged batteries

Incorrect cable sections

Badly tightened connections.

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MaxPower CT60 Anleitung zur Fehlerbehebung Seite 9