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Emergency Power System
Former Community Member
Say you had a building that needed backup power. Do any British Regs require that the loads be subdivided onto different branches and different automatic transfer switches based on type and priority?
Pretty much as you would in the US - although we have very few legally mandated loads (usually fire related systems).
What gets connected is a matter of risk assessment - are you seeing the difference here - we decide what needs to be done based on performance required rather than blind adherence to code
It's also likely we would have less ATS - so a typical system might have a transformer incomer to a switchboard, a bus section switch and a generator incomer to the switchboard - we would use the incoming ACB's and bus switch with interlocks as the ATS - ie swap the whole of the load to emergency supply rather than bits of it. If we have a partial standby, again we might open the bus switch to only support half the switchboard.
As I understand NEC, you would tend to do this at the feeder level via dedicated ATS
Of course we also have systems that keep the mains and generator synchronised
Pretty much as you would in the US - although we have very few legally mandated loads (usually fire related systems).
What gets connected is a matter of risk assessment - are you seeing the difference here - we decide what needs to be done based on performance required rather than blind adherence to code
It's also likely we would have less ATS - so a typical system might have a transformer incomer to a switchboard, a bus section switch and a generator incomer to the switchboard - we would use the incoming ACB's and bus switch with interlocks as the ATS - ie swap the whole of the load to emergency supply rather than bits of it. If we have a partial standby, again we might open the bus switch to only support half the switchboard.
As I understand NEC, you would tend to do this at the feeder level via dedicated ATS
Of course we also have systems that keep the mains and generator synchronised
