Grounding and light ning prot ect ion
Chapt er 2: Planning considerat ions
2- 8
phn- 2513_004v000 ( Oct 2012)
Lightning protection zones
Use the ‘rolling sphere method’ (
) to determine where it is safe to mount
equipment. An imaginary sphere, typically 50 meters in radius, is rolled over the structure.
Where the sphere rests against the ground and a strike termination device (such as a finial
or ground bar), consider the space under the sphere to be in the zone of protection (Zone
B). Where the sphere rests on two finials, consider the space under the sphere to be in the
zone of protection.
Figu r e 4 2
Rolling sphere m et hod t o det erm ine t he light ning prot ect ion zones
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 equipment 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 equipment in
this zone.
Never mount equipment in Zone A. Mounting in Zone A may put equipment,
structures and life at risk.
Содержание PTP 800 Series
Страница 1: ...Cambium PTP 800 Series User Guide System Release 800 05 02 ...
Страница 40: ...Licensing requirements About This User Guide 10 phn 2513_004v000 Oct 2012 ...
Страница 232: ...Limit of liability Chapter 3 Legal information 3 22 phn 2513_004v000 Oct 2012 ...
Страница 322: ...Radiation hazard assessm ent Chapter 4 Reference information 4 90 phn 2513_004v000 Oct 2012 ...
Страница 418: ...Replacing IRFU components Chapter 5 Installation 5 96 phn 2513_004v000 Oct 2012 Figure 1 1 0 IRFU components example ...
Страница 428: ...Replacing IRFU components Chapter 5 Installation 5 106 phn 2513_004v000 Oct 2012 ...
Страница 552: ...Configuring for FIPS 140 2 applications Chapter 6 Configuration and alignment 6 124 phn 2513_004v000 Oct 2012 ...
Страница 630: ...Using recovery mode Chapter 7 Operation 7 78 phn 2513_004v000 Oct 2012 ...
Страница 648: ...Glossary I V phn 2513_004v000 Oct 2012 ...