Sailor 100, Руководство по установке

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Alternative grounding for steel hulls
B-4 Appendix B: Grounding and RF protection 98-136280-B
B.3 Alternative grounding for steel hulls
The following guidelines assume a two-wire, isolated grounding arrangement; that is
no part of the circuit, in particular the battery negative, is connected to any ground
potential or equipment.
B.3.1 Grounding the ACU
The ACU should preferably be grounded to the ship with the short cable. Further, the
ACU must be grounded at its grounding stud in order to ensure a proper grounding if
the short ADU cable is disconnected.
The ground connection can be established either at the hull (recommended) or at a
dedicated RF ground if available (alternative).
The ACU provides galvanic isolation (as required) from its input power terminals to the
chassis/grounding stud. This way the isolated grounding arrangement is maintained.
B.3.2 Grounding the ADU
Terminal grounded at the hull (recommended)
In this case the ADU is grounded to the ship via one (or more) of its mounting bolts.
Make sure to remove painting, dirt, grease etc. at the mounting holes in order to make
good electrical contact to the hull. Use serrated washers when securing the mounting
bolts and seal the joint with protective coating to avoid corrosion.
Terminal grounded at a dedicated RF ground (alternative)
In this case the ADU is grounded with a separate ground cable. The ground cable must
be routed parallel and close to the shielded coax cable connecting the ADU to the ACU
grounding kit. A heavy gauge wire with tinned strands (min. 6 mm
2
) can be used for
this purpose.
Importan
However, bear in mind that the ADU ground
connection is to be made at the
same electrical
ground potential as the ACU (see Grounding the
ADU ).
Note
For optimum grounding use the mounting bolt located closest to the ADU
cable plate, see Figure 3-20:
ADU, bolt for optimum grounding on page 3-20.
Note The ADU must be electrically isolated at its mounting bolts by
means of shoulder bushings and washers ensuring the
isolated RF ground - see
Isolation of the ADU from the
mounting base on page B-10.
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