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Powering the Shard

Former Community Member
Former Community Member
Afternoon one & all


I know we have single and three phase power, single mainly for domestic and three phase for commercial and small industrial.  But what sort of supply would The Shard have, does it have several 3 phase supplies or does it have an even higher supply that is then lowered via step down transformers to supply the various floors etc?
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    well the link I posted below suggested they had about 6 megawatts of load in total and implied they intended to stepped up from the incoming 11kV to 20kV for the internal distribution, which surprised me, I'd have expected an 11kV loop to be easier, but may be about keeping the cable ducts to a manageable diameter for other reasons (even at 20kV phase to phase ~ 15kV phase to ground 6MVA is around 150 amps per phase)

    Mind you 20kV phase to phase is one of the French and Italian HV distribution standards, where we might normally use 11kV or 33kV (or occasionally 6,6 in the UK) so perhaps the choice of primary voltage for the upstairs HV to LV transformers may have been as simple as a cut and paste from the last job by the Italian architects.
    a note from the cahier techniques about HV in varying countries.
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  • 0
    well the link I posted below suggested they had about 6 megawatts of load in total and implied they intended to stepped up from the incoming 11kV to 20kV for the internal distribution, which surprised me, I'd have expected an 11kV loop to be easier, but may be about keeping the cable ducts to a manageable diameter for other reasons (even at 20kV phase to phase ~ 15kV phase to ground 6MVA is around 150 amps per phase)

    Mind you 20kV phase to phase is one of the French and Italian HV distribution standards, where we might normally use 11kV or 33kV (or occasionally 6,6 in the UK) so perhaps the choice of primary voltage for the upstairs HV to LV transformers may have been as simple as a cut and paste from the last job by the Italian architects.
    a note from the cahier techniques about HV in varying countries.
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