Lightning Protection Zones; Figure 2-6 Rolling Sphere Method To Determine The Lightning Protection Zones - Motorola PTP 48600 User Manual

User Guide: PTP 600 Series

Lightning protection zones

Lightning protection zones are determined by using the 'rolling sphere method'
(Figure 2-6). Assess locations on masts, towers and buildings to determine if the
location is in Zone A or Zone B:
•
Zone A: In this zone a direct lightning strike is possible. Do not mount the ODU
and antenna in this zone.
•
Zone B: In this zone, direct EMD (lightning) effects are still possible, but
mounting in this zone significantly reduces the possibility of a direct strike.
Mount the ODU and antenna in this zone.
WARNING

Figure 2-6 Rolling sphere method to determine the lightning protection zones

50 m
phn-0896_009v003
Feb 2010
Never mount the ODU in Zone A. Mounting in Zone A may put
equipment, structures and life at risk.
Zone A
UNDER DEVELOPMENT
ODU
Zone B
Zone B
Lightning protection
Zone A
2-19