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DNO upgrade.

broadgage
A farm near me has only a single phase 60 amp supply, believed to be 100 amps until the fuse operated recently. They are the last customer on an LV overhead line and the voltage regulation is very poor.

A three phase 11Kv line crosses their property, but the supply is not derived therefrom rather surprisingly.


They have requested an upgrade to three phase 200 amps.


The DNO have offered this for some very substantial price, but have offered to waive this fee if the farmer will grant to the DNO a long lease for a small substation. Consisting of a ground mounted transformer, air break 11 Kv switches atop poles and related equipment, room for second transformer if required.

This seems to me to be a good bargain, is there any reason not to agree ?
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    As you describe it, I suggest he bites their hand off quick.. ?

    Unless - the proposed new transformer is so large or in such a place that will obstruct access to,  or the normal working of, the farm, or they need to do a lot of excavation for earth mats and so on to install it.

     

    I presume they are thinking of reversing the direction of the LV and supporting the supply to  other users at the low end of the current cable - space for two transformers sounds like they are thinking of more than just this farm.

    Is the proposed new farm supply TT or TNS - you do not really want questions of step voltages from electrodes - is this the sort of farm with priceless horses, or herds of valuable cattle, or more like a grain dryer and shed full of chickens ? It may matter a bit. Check if for example once the new TX is in , how close the DNO think he can plant an electric fence to it.

    Mike.

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  • 0
    As you describe it, I suggest he bites their hand off quick.. ?

    Unless - the proposed new transformer is so large or in such a place that will obstruct access to,  or the normal working of, the farm, or they need to do a lot of excavation for earth mats and so on to install it.

     

    I presume they are thinking of reversing the direction of the LV and supporting the supply to  other users at the low end of the current cable - space for two transformers sounds like they are thinking of more than just this farm.

    Is the proposed new farm supply TT or TNS - you do not really want questions of step voltages from electrodes - is this the sort of farm with priceless horses, or herds of valuable cattle, or more like a grain dryer and shed full of chickens ? It may matter a bit. Check if for example once the new TX is in , how close the DNO think he can plant an electric fence to it.

    Mike.

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