ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

ECN Shout Chat
Top Posters(30 Days)
Admin 17
Recent Posts
Old decora style outlets
by Admin. 03/25/17 11:40 AM
ESA Arc flash course
by TheShockDoctors. 03/24/17 10:15 AM
fuse rejectors
by HotLine1. 03/24/17 07:53 AM
Another Forum Update
by Admin. 03/22/17 03:04 PM
Dining room plugs
by watersparkfalls. 03/21/17 10:31 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
231,471 Are you busy
166,174 Re: Forum
160,628 Need opinion
Who's Online Now
1 registered members (sparkyinak), 49 guests, and 12 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#207718 - 11/21/12 08:33 PM MPBS - Mobile Phone Base Station  
Admin  Offline

Administrator
Member
Joined: Oct 2000
Posts: 3,435
NY, USA
Quote
Two sets of photos, one is a newish design of installation known as MPBS - Mobile Phone Base Station and is designed to allow mobile phone masts to be installed on existing HV transmission towers taking its supply from MV supply via a transformer

The other two are just examples of MV transmission, but vertically aligned, due to the other set being removed.

John Orme

[Linked Image]

[Linked Image]

[Linked Image]

[Linked Image]

[Linked Image]

[Linked Image]

[Linked Image]


Tools for Electricians:

#207808 - 11/28/12 05:38 PM Re: MPBS - Mobile Phone Base Station [Re: Admin]  
geoff in UK  Offline
Member
Joined: Dec 2002
Posts: 180
UK
I've noticed that sort of base station on HV pylons and two thoughts come to mind. 1 Does the HV transmission system have to be shut down for them to be worked on? and 2 Are there special measures incorporated to overcome EM interferance? The field strength must be enormous where they are located.


#207819 - 11/29/12 02:28 AM Re: MPBS - Mobile Phone Base Station [Re: Admin]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,057
Estero,Fl,usa
It looks like they locate the antenna low enough to get NESC clearance to the HV lines and I doubt a cell tower can even see 60hz.


Greg Fretwell

#207912 - 12/07/12 11:24 AM Re: MPBS - Mobile Phone Base Station [Re: Admin]  
harold endean  Offline
Member
Joined: Feb 2002
Posts: 2,233
Boonton, NJ
I have seen cell tower horns on HV transmission tower, but I thought it was only there for support, not for power.


#208099 - 12/26/12 12:00 PM Re: MPBS - Mobile Phone Base Station [Re: Admin]  
johno12345  Offline
Member
Joined: Sep 2005
Posts: 96
United Kingdom
They are designed to be worked on while everything is live, but the equipment on the ground has to be outside the circle of influence from earth faults on the tower.

the transformer on the 11kv pole can only supply the one single base station


There are a lot of fibre optic cables on HV transmission pylons here, its wrapped around the top earth conductor


I took my time, I hurried up, The choice was mine, I didn't think enough


Member Spotlight
RonKipperDatacom
RonKipperDatacom
Kansas City, KS
Posts: 30
Joined: January 2013
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.014s Queries: 16 (0.003s) Memory: 0.7688 MB (Peak: 0.9081 MB) Zlib enabled. Server Time: 2017-03-26 03:16:40 UTC