Simrad ES333-7C - REV A, Руководство по установке, Страница: 32 / 52

Simrad ES333-7C
STEEL CONDUIT
Why use steel conduits?
It is strongly recommended to lay a steel conduit from the
transducer’s cable gland to the echo sounder transceiver, and to
pull the transducer cable through this conduit. There are several
reasons for this.
• It will make it easier at a later stage to replace the transducer.
• Noise and interference from other electrical equipment is
greatly reduced.
• The risk of flooding is greatly reduced if the pipe is terminate
above the water line.
With a steel conduit the installation will satisfy the EU
regulations for EMC interference. Without a steel conduit, there
is a risk of reduced echo sounder performance.
Steel conduits qualities and shielding
The steel conduit must be unbroken and watertight from the
transducer to above the water line. From there, the cable can
be pulled further, or a junction box can be installed to facilitate
further connections. Note that the steel conduit must act as a
continuous electrical screen all the way.
Steel conduit dimensions:
• minimum 35 mm inner diameter
• minimum 6 mm wall thickness (4.5 mm if galvanised)
More that one transducer cable?
If two or more transducers are installed close to each other it is
possible to pull their cables in the same steel conduit, provided
the conduit diameter is increased accordingly. However, for easy
replacement it is recommended that each transducer has its own
steel conduit.
30
329786/A