Lightning surge protection for 3G/4G/5G Radio Cellular Masts

Mike 

Very impressed with speed of response - thankyou very much  , I'm very sorry but please can you tell me what TT and TNC mean .. just shows how new to this I am ! 

its the Base Site Mast and equipt , but I certainly should consider the PSU.


The deployments (s) are on trailers and located at a suitable coverage spot for about 2 - 3 months to cover  over a season  mounted on a trailer , often in exposed locations ( like near a quarry ) . The mast is a tilt-over (or pneumatic)  10m (like the ALTRON), with an omni perhaps 2 -3 deg downtilt / 10 - 20 EIRP  for Band 1 (2100 MHz)  .. often generator and locally powered, although a PV cell supplement for the Battery backup. Local backhaul is a fibre CPRI connection , possible to a mmW Line-of-Site dish.  


The method i was looking at was used SPD (say from Furse etc and Polyphaser components on RF feed lines. ) with an airgap at the top of the Antenna perhaps a 30cm with a conductor (at least 10 mm2)  running to multiple earth spikes in a 1m trench which would have to be dug out and backfilled with Marconite or something similar) and try and meet the < 10 ohm ground resistance mentioned in BS 6761.   BIG problem would be the change in RF coverage from this so this may not be viable at all.  I'd not considered the power supply conductors (which was a serious oversight)  and will go for an RCD and a grounding  to the spikes . 


Does this make sense. ? 


Paul 

Mike 

Very impressed with speed of response - thankyou very much  , I'm very sorry but please can you tell me what TT and TNC mean .. just shows how new to this I am ! 

its the Base Site Mast and equipt , but I certainly should consider the PSU.


The deployments (s) are on trailers and located at a suitable coverage spot for about 2 - 3 months to cover  over a season  mounted on a trailer , often in exposed locations ( like near a quarry ) . The mast is a tilt-over (or pneumatic)  10m (like the ALTRON), with an omni perhaps 2 -3 deg downtilt / 10 - 20 EIRP  for Band 1 (2100 MHz)  .. often generator and locally powered, although a PV cell supplement for the Battery backup. Local backhaul is a fibre CPRI connection , possible to a mmW Line-of-Site dish.  


The method i was looking at was used SPD (say from Furse etc and Polyphaser components on RF feed lines. ) with an airgap at the top of the Antenna perhaps a 30cm with a conductor (at least 10 mm2)  running to multiple earth spikes in a 1m trench which would have to be dug out and backfilled with Marconite or something similar) and try and meet the < 10 ohm ground resistance mentioned in BS 6761.   BIG problem would be the change in RF coverage from this so this may not be viable at all.  I'd not considered the power supply conductors (which was a serious oversight)  and will go for an RCD and a grounding  to the spikes . 


Does this make sense. ? 


Paul