User Manual

AXELL CSR 3604-3304 UHF REPEATER
PRODUCT DESCRIPTION AND USER’S MANUAL
18 DOC PN 3633B-UM Rev. 2.1 © Axell Wireless Ltd
4.7 EMV Protection
CAUTION! If insufficient Electromagnetic Protection is provided,
or if EMV measures are not taken, warranties issued by Axell Wireless
are not valid.
The lightning hazard to electric and electronic equipment consists in the interferences of
direct lightning current infections and high surge voltages induced by the electromagnetic
field of nearby lightning channels or down conductors. Amplitudes from cloud-to-earth
lightning amounts to several 10kA and may last longer than 2(ms). The damage caused
depends on the energy involved and on the sensitivity of the electronics systems.
Ensure that lightning protection measures are taken to create a reliable repeater site.
Protect all coaxial cables and power cables from the transients caused by lightning. Fit all
cables with suitable lightning protection devices.
For detailed information please refer to IEC 61024-1 and 61312-1 for international standards
for protection of information systems against LEMP, Lightning Electromagnetic Pulse,
including radio transmitters. They define proper planning, installation and inspection of
effective lightning protection systems.
Figure 4-8. Example of EMV protection for a repeater system
Antennas
Primary Protective
Devices
Equipotential
Grounding Bars
230V AC/48V DC
Protective Device
Secondary
Protective Devices
The top of the
mast must be
higher than
the antennas
and be
properly
grounded
The
grounding
path must
have reliable
continuity
and be
correctly
dimensioned
VAC/DC