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Bonding of temporary metal fences at a Railway station platform

tattyinengland
HI Chaps


One of the jobs I need to do in the near future is bond some temporary metal fences at a railway station platform.


I would not normally bond metal fences, but I know that this a requirement in this case; metal fences, metal stairways from the platform up to the overhead concourse etc


The overhead train HV lines are probably 5m away from these fences.


Do anyone have any further information for me so that I can understand why we are bonding these fences and what we are trying to achieve? 


I suppose its something to do with the HV side of things..................


Any help would be much appreciated


Kind Regards


Tatty
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    Thanks for the update Brian.


    When you say the voltage is kept to 25V at stations, is that 25V relative to local earth or 25V relative to earth at the substation?


    When the far end catenary voltage is down to 20kV, how much of  the volt drop along the catenary and how much is along the return path?

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  • 0
    Thanks for the update Brian.


    When you say the voltage is kept to 25V at stations, is that 25V relative to local earth or 25V relative to earth at the substation?


    When the far end catenary voltage is down to 20kV, how much of  the volt drop along the catenary and how much is along the return path?

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