HV Pylon Anatomy

[gman76]

Inspired by RF Lighting's recent pylon post, here is mine:

Untitled

• gman76
• 4 Jun 2013
• 1

This is the larger of two overhead supplies to an industrial estate.

Does anybody know what purpose the metal screens in the centre serve?

Also, what voltage are these carrying?

 

[RF Lighting]

I have no idea. Just a complete guess, to prevent bird strikes?

 

[SimonH2]

My guess would be to limit the ability of a flashover on one side (including should a fuse fail in "a dramatic way") to affect the other side. But that's just a guess.
If earthed, then I could see they might be there to allow work on one side with the other live. But that's also a guess.

Is there anything about the site that might make the supplies need to have higher availability than normal ?

 

[Jackrae]

Not quite on topic but some 50 years or so ago, electrical distribution systems ( at least to my eye) were very neat and tidy. I've noticed over the past few years that pole mounted MV/LV distribution systems are getting very "messy" with multiplicity of "devices" most of which seem to be hanging off at any old angle. In international parlance they are starting to look very "Americanised". I suppose that's "progress" !!

 

[westie101]

Does anybody know what purpose the metal screens in the centre serve?

It provides an earthed metal screen to permit work on one side with the other live

Also, what voltage are these carrying?

33kV

 

[gman76]

Ah, that makes sense - thanks westie & top marks to SimonH2 for educated guesswork!