Specifications

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NAVAIR
TECHNOLOGIES
RF Surge Protection
Table below allows comparison between the 3 technologies of RF coaxial surge protectors, in order to select the right
solution regarding the application and the requirements.
Gas tube
P8AX
Sparkover
from 70V to 600 V in relation with the
dV/dt , then arc regime (short - circuit
of the line in the full bandwidth). RF
signal disturbed during the protection
o peration.
DC to 3GHz (dependent of the coaxial
connector and of the impedance)
Compatible
10 kA
Linked to the GDT stress N, BNC,
TNC, UHF, SMA, 7/16
DC Block
CXP-DCB
Sparkover + Filtering
< 100 V
Short-circuit of the line in the full
bandwidth : RF signal disturbed during
the protection operation.
125-1000 MHz
Not compatible
10 kA
Linked to the GDT stress
N, BNC, TNC, F
Quarter wave
PRC
Adapted short-circuit/selective band fi lter
< 20 V
RF signal not disturbed during the
protection operation.
Narrox band (GSM, DCS1800, PCS,
DECT, GPS) Wide band (e.i. 1,3 - 2,8 GHz)
Not compatible
Fonction de la connectique : 100 kA
pour le 7/16, 50 kA pour le N
Illimited
7/16, N, TNC....
The effi ciency of coaxial protectors is highly dependent on proper
installation, in particular their connection to the earthing network of the
installation.
The following installations rules must be strictly observed to insure the
effi ciency:
Equipotential bonding network : all the bonding conductors of the
installation must be interconnected and connected to the installation
earthing network.
Optimized connection of the protector to the bonding network: to reduce
the residual voltages during lightning discharge currents, the connection
of the protector to the bonding network must be as short as possible (less
than 50 cm) and has a proper cross section (at least 4 mm).
The ’feedthrough mounting‘ versions meet perfectly all these requirements.
Warning: for good contact, remove carefully all paintings or insulating
coatings.
Location of the protectors: they should preferably be placed at the
entrance of the installation (to limit the penetration of lightning currents)
and also near sensitive equipment (to enhance protection).
Feedthrough mounting
Direct mounting of the surge protector on the grounded frame at the instal-
lation entrance:
– perfect connection to the bonding network
– best location (conduction of the surge currents at the entrance of the
installation)
– good mechanical withstand.
Alternative mounting
– connection to the bonding network by wire (4 mm minimum and shortest
length possible).
Technology
CITEL series
Principle
Residual voltage
Bandwidth
DC injection
8/20s discharge
current capability
Life expectancy
Connedtors