
Chapter 2: Installation
98-141368-A 34
Power cable selection
A power cable of 1 m is supplied with the SAILOR Fleet One terminal. Use this cable if possible.
If 1 m is not long enough, you can extend the cable according to the guidelines in this section.
Source impedance
The length of the power cable depends on the type of cable used and the source impedance of
the DC power installation in the ship.
The maximum allowed source impedance depends on the usage of the power range of the
terminal DC input (10.5 - 32 V DC; 11.5 A - 4 A).
Select a power outlet from the DC system and measure the source impedance of the ship
installation as described in the next section.
For further recommendations on power cable selection, see Power cable recommendations
on page 35.
Measuring the ship source impedance
Select a power outlet from the ship 24 V DC or 12 V DC system, and measure the source
impedance of the ship installation as described below.
1. Measure the voltage without load (R.var disconnected).
2. Set the current to e.g. 1 A by adjusting R.var.
3. Measure the corresponding voltage change.
Example:1 A and 50 mV. Source impedance: 50 mV/1 Amp = 50 mOhm.
If the total impedance is higher than the limits stated in this section, the terminal
may become unstable and start to on/off oscillate.
The total impedance is made up of the source impedance of the ship power
supply plus the impedance of connected cables including connectors and joints
where cables are extended.
A
V
Ship Installations
Battery 24 VDC
BDU Power
outlet
R.var
Power outlet
for terminal
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