User's Manual Part 2

Quantum 1000 Base Station User
3.
Grounding and Lightning Requirements
Proper lightning protection requires t
protection built into the PureWave equipment. The primary protectors offer the surge currents a direct
path to earth ground versus the undesirable sneak paths it may find through the equip
Properly installed and grounded primary protectors will dramatically increase the surge withstanding
capabilities of the PureWave equipment. Surges that exceed the maximum ratings of the primary
protector devices will eventually cause them to fail,
short or open, as the application warrants, such that further surges will not damage the end equipment.
While a failed primary protector still results in a service outage, it does prevent further damage
more expensive end equipment.
A Base Station that is installed outdoor on the tower or mast (ODU) is especially vulnerable to lightning
surges. Good surge mitigation practice starts with the lightning rod and its connection to a proper sized
down conductor.
The ground down conductor should be as straight as possible and avoid incidental contact with other
conductors such that it represents the path of least resistance to earth ground from the lightning rod. The
tower/mast is also earth grounded to
safety, and generally presents a less desirable path to ground to surge currents. ODU equipment and
external primary protection devices are mounted to the tower/mast and should be bonded t
at the same point on the down conductor. This practice is intended to avoid ground loop currents that may
flow from differences in potential between the tower/mast structure and down conductor while large surge
currents are flowing in them r
espectively. Good surge mitigation practice also makes use of shielded
cables with peripheral shield grounding to minimize potentials induced on circuit conductors.
These cables should also be secured to the tower/mast at regular intervals to create
from conductors which are carrying surge currents. This practice avoids incidental contact or possible
insulation breakdown from high surge potentials.
A Base Station that is installed indoor units (IDU) requires similar protection as
(ODU). Primary protection devices are installed on all cables just prior to entry of the facility and bonded
to an earth ground stake. Likewise, the cable shields are grounded at the entry panel which should be
bonded to the same e
arth ground stake.
IDU equipment may also be vulnerable to surges entering via the AC power connection and steps should
be taken to install a proper AC Surge Suppressor device to complete a well protected installation.
3.1
Lightning Protection Installation
The following are considered to be the main elements that constitute the components of a lightning
protection scheme.
Lightning Rod
Base Station and Antenna Grounding
Down Conductor
Coaxial and/or Cat 5 Cable Shield Grounding
Quantum 1000 Base Station User
Guide
Grounding and Lightning Requirements
Proper lightning protection requires t
he use of external primary protectors to complement the secondary
protection built into the PureWave equipment. The primary protectors offer the surge currents a direct
path to earth ground versus the undesirable “sneak” paths it may find through the equip
Properly installed and grounded primary protectors will dramatically increase the surge withstanding
capabilities of the PureWave equipment. Surges that exceed the maximum ratings of the primary
protector devices will eventually cause them to fail,
however these devices are generally designed to fail
short or open, as the application warrants, such that further surges will not damage the end equipment.
While a failed primary protector still results in a service outage, it does prevent further damage
A Base Station that is installed outdoor on the tower or mast (ODU) is especially vulnerable to lightning
surges. Good surge mitigation practice starts with the lightning rod and its connection to a proper sized
The ground down conductor should be as straight as possible and avoid incidental contact with other
conductors such that it represents the path of least resistance to earth ground from the lightning rod. The
tower/mast is also earth grounded to
keep its conductive elements at earth potential (0V) for personnel
safety, and generally presents a less desirable path to ground to surge currents. ODU equipment and
external primary protection devices are mounted to the tower/mast and should be bonded t
at the same point on the down conductor. This practice is intended to avoid ground loop currents that may
flow from differences in potential between the tower/mast structure and down conductor while large surge
espectively. Good surge mitigation practice also makes use of shielded
cables with peripheral shield grounding to minimize potentials induced on circuit conductors.
These cables should also be secured to the tower/mast at regular intervals to create
physical separation
from conductors which are carrying surge currents. This practice avoids incidental contact or possible
insulation breakdown from high surge potentials.
A Base Station that is installed indoor units (IDU) requires similar protection as
the outdoor installation
(ODU). Primary protection devices are installed on all cables just prior to entry of the facility and bonded
to an earth ground stake. Likewise, the cable shields are grounded at the entry panel which should be
arth ground stake.
IDU equipment may also be vulnerable to surges entering via the AC power connection and steps should
be taken to install a proper AC Surge Suppressor device to complete a well protected installation.
Lightning Protection Installation
Components
The following are considered to be the main elements that constitute the components of a lightning
Base Station and Antenna Grounding
Coaxial and/or Cat 5 Cable Shield Grounding
Rev 1.1, Page
38 of 70
he use of external primary protectors to complement the secondary
protection built into the PureWave equipment. The primary protectors offer the surge currents a direct
path to earth ground versus the undesirable sneak paths it may find through the equip
ment.
Properly installed and grounded primary protectors will dramatically increase the surge withstanding
capabilities of the PureWave equipment. Surges that exceed the maximum ratings of the primary
however these devices are generally designed to fail
short or open, as the application warrants, such that further surges will not damage the end equipment.
While a failed primary protector still results in a service outage, it does prevent further damage
to the
A Base Station that is installed outdoor on the tower or mast (ODU) is especially vulnerable to lightning
surges. Good surge mitigation practice starts with the lightning rod and its connection to a proper sized
The ground down conductor should be as straight as possible and avoid incidental contact with other
conductors such that it represents the path of least resistance to earth ground from the lightning rod. The
keep its conductive elements at earth potential (0V) for personnel
safety, and generally presents a less desirable path to ground to surge currents. ODU equipment and
external primary protection devices are mounted to the tower/mast and should be bonded t
o earth ground
at the same point on the down conductor. This practice is intended to avoid ground loop currents that may
flow from differences in potential between the tower/mast structure and down conductor while large surge
espectively. Good surge mitigation practice also makes use of shielded
cables with peripheral shield grounding to minimize potentials induced on circuit conductors.
physical separation
from conductors which are carrying surge currents. This practice avoids incidental contact or possible
the outdoor installation
(ODU). Primary protection devices are installed on all cables just prior to entry of the facility and bonded
to an earth ground stake. Likewise, the cable shields are grounded at the entry panel which should be
IDU equipment may also be vulnerable to surges entering via the AC power connection and steps should
be taken to install a proper AC Surge Suppressor device to complete a well protected installation.
The following are considered to be the main elements that constitute the components of a lightning

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