Very interesting, and not quite the same philosophy - in the event of failure of external power it makes perfect sense to cluster those loads you wish to maintain, and those you will drop, but I might have expected things like ventilation and maybe lights to be a mix of maintained and not, to reduce the load on the genset, but maintain a tolerable if not ideal environment inside.
The thinking for preventing large area loss due to a single fault in the building is not really quite the same over here either - if one of the critical group sub-mains gets spiked, or even if it just needs to be dead tested as part of a periodic inspection, it is not clear how you keep everything else working, I presume there are other links not shown, or the final circuit sub-division is such that very small areas can be isolated quickly.
Very interesting, and not quite the same philosophy - in the event of failure of external power it makes perfect sense to cluster those loads you wish to maintain, and those you will drop, but I might have expected things like ventilation and maybe lights to be a mix of maintained and not, to reduce the load on the genset, but maintain a tolerable if not ideal environment inside.
The thinking for preventing large area loss due to a single fault in the building is not really quite the same over here either - if one of the critical group sub-mains gets spiked, or even if it just needs to be dead tested as part of a periodic inspection, it is not clear how you keep everything else working, I presume there are other links not shown, or the final circuit sub-division is such that very small areas can be isolated quickly.
