Thrane&Thrane SAILOR 6110, Installation Manual

Page: 46 / 82

Chapter 4: Connecting the system
36 Connecting power
3. Calculate the maximum allowed impedance in the extension cable as
follows:
Max. allowed impedance in extension cable = max. total impedance -
measured source impedance including impedance of the supplied cable.
4. Then calculate the max. extension cable length as follows:
Max. impedance in extension cable (from step 3)
Max. length = 0.5 x impedance/meter (from step 2)
(The length is multiplied by 0.5 above because there are two conductors in the
cable.)
Example:
Ship supply voltage: 15 V DC
Ship source impedance (measured): 50 m

Extension cable type: 1.31 mm
2
(AWG 16)
Max. cable extension =
In this case, the power cable can be extended with up to 28.8 m.
If you need more length, you can double the maximum allowed length by
connecting two cables instead of one, or you can use a cable with a larger
diameter.
Note
The maximum allowed total length of cables between the
GMDSS Terminal and the SAILOR 6081 PSU and Charger is 55 m.
0 5

800 m

50 m

–
13 0 m
   
m

----------------------------------------

28 8 m

=