The IET is carrying out some important updates between 17-30 April and all of our websites will be view only. For more information, read this Announcement
The IET is carrying out some important updates between 17-30 April and all of our websites will be view only. For more information, read this Announcement
You've never seen entire towns get fed with many pole pigs? ?
One unit per 5-7 homes, One 3 phase bank per commercial property?
Certainly not. ? And we do not do phase banks, we do proper 3 phase transformers like the ones in This brochure.
Well, "never seen" except on holiday in Brazil, and on work trips to Japan, both of whom also seem to have a fetish for overhead cable, and no worries about HV and LV on the same pole. Brazil even do mixed polyphase and SWER on the HV so they cannot do earth fault detection on the HV - in the UK that would be a big no-no.
The local UK DNO design is to install larger and larger TX as the no of users grows, up to about 70 houses per phase serving a radius of a few hundred metres, so max of maybe 200 houses and the small shops per half megawatt transformer.
London is 'funny' as they have a much higher user density, so things that would not be done elsewhere, like cross-link at LV and having 33kV and 11kV in the same street. They also have more MW size transformers.
Also really tall buildings may have vertical HV risers and transformers to 230/400 LV on a number of floors
The larger transformer for the bigger village would go on an H pole in rural places that flood, but more commonly in a shed at ground level, or in the sub-urbia pad mount with a fence and hedge around it, and always on the ground in a built up area. Where did you grow up ?
Mike.
You've never seen entire towns get fed with many pole pigs? ?
One unit per 5-7 homes, One 3 phase bank per commercial property?
Certainly not. ? And we do not do phase banks, we do proper 3 phase transformers like the ones in This brochure.
Well, "never seen" except on holiday in Brazil, and on work trips to Japan, both of whom also seem to have a fetish for overhead cable, and no worries about HV and LV on the same pole. Brazil even do mixed polyphase and SWER on the HV so they cannot do earth fault detection on the HV - in the UK that would be a big no-no.
The local UK DNO design is to install larger and larger TX as the no of users grows, up to about 70 houses per phase serving a radius of a few hundred metres, so max of maybe 200 houses and the small shops per half megawatt transformer.
London is 'funny' as they have a much higher user density, so things that would not be done elsewhere, like cross-link at LV and having 33kV and 11kV in the same street. They also have more MW size transformers.
Also really tall buildings may have vertical HV risers and transformers to 230/400 LV on a number of floors
The larger transformer for the bigger village would go on an H pole in rural places that flood, but more commonly in a shed at ground level, or in the sub-urbia pad mount with a fence and hedge around it, and always on the ground in a built up area. Where did you grow up ?
Mike.
