iRelay 460 Equipment Installation Guide
UGD-D01035
Airspan Commercial and Internal Use
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red dividing line.
Figure 18:
Recommended Metal Combinations
Important:
Corrosion due to electrochemical action between dissimilar metals that are in
contact can be minimized if the combined electrochemical potential is below 0.6 V.
Figure 18
shows the combined electrochemical potentials for a number of pairs of metals that are
commonly used. Avoid combinations listed above the red dividing line.
3.2 Lightning Protection
The use of lightning protection depends on the regulatory and end user requirements. To minimize
the risk of damage caused by the lightning strikes, iR460 is designed with built-in surge limiting
circuits. Airspan recommends to use additional surge protection devices for longs exposed cable runs
(for example—a cable over 5 m).
Additional surge protector device can be positioned at the building entry point and grounded properly,
as illustrated in the figure below.
Airspan recommends to avoid positioning iR460 at the highest point on a structure (for example—the
roof of a building, telecoms mast or tower). Ideally you should position the iR460 unit within a lightning
protected zone.
