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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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    Interesting, clearly London is becoming more "continental" . Joking aside it seems quite wasteful to have extra transformers for 11 to 22 rather than just run round in the incoming voltage, or alternatively to raise the HV loop to 33kV and get the currents down.

    I presume that the problem is one of legacy equipment and use of existing cable ratings, as there are plenty of 33kV to 400V transformers on the ends of long lines in very rural places, so it can be done, just maybe not in the middle of existing system.

    Similar problems are slowing down the voltage increase on the London underground, which is/ has been trying to move from 630-ish DC to more like 750 to align with the 3rd rail railways (and at the current rate of progress will be just about done in time for all  the 3rd rail railway to start planning change to 25kV overhead lines.)
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  • 0
    Interesting, clearly London is becoming more "continental" . Joking aside it seems quite wasteful to have extra transformers for 11 to 22 rather than just run round in the incoming voltage, or alternatively to raise the HV loop to 33kV and get the currents down.

    I presume that the problem is one of legacy equipment and use of existing cable ratings, as there are plenty of 33kV to 400V transformers on the ends of long lines in very rural places, so it can be done, just maybe not in the middle of existing system.

    Similar problems are slowing down the voltage increase on the London underground, which is/ has been trying to move from 630-ish DC to more like 750 to align with the 3rd rail railways (and at the current rate of progress will be just about done in time for all  the 3rd rail railway to start planning change to 25kV overhead lines.)
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