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Ring buss

5K views 15 replies 9 participants last post by  dtmartin408 
#1 ·
When did this design come into use? Which country was the first to use it?
 

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#5 · (Edited)
#7 ·
I wouldn't have a clue but googled out of curiosity and this came up, some cool old drawings and photos

http://lcweb2.loc.gov/master/pnp/habshaer/pa/pa3600/pa3680/data/pa3680data.pdf

http://www.loc.gov/pictures/collection/hh/item/pa3680/

A book from 1909 ... couldn't be too much older than that could it?

edit - It was "almost universal" in 1903?

Engineering, volume 76, page 605, 1903

The Electrical Engineer, Volume 31 - 1903

:notworthy::notworthy: That pure awesome! :D And thank you! :)


So it seems ring buss came from or was predominately a European thing?

Also, what interesting is it seem the earliest ring buss systems were simply manual switches for the ease of switching devices for maintenance, while the breakers (fault interrupting) where still directly in series with the outgoing feeder like single breaker single buss.

Did they not have the relaying technology back then to do the same with the breakers?
 

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#15 ·
Single buss with sectionalizers I believe. Same with the 26KV although there are 26KV rings for network areas here, and a 26KV ring in at least one sub for overhead distribution. The substation guys would know more. Up here every sub is different, not a single sub is the same. Most subs do have 3 incoming transmission lines that feed the switch yard (buss), then hit the XFMR which may be an auto, or not. Then hit the distribution switch yard, and finally out too the customer.
 
#16 ·
loops and rings.

I operate a system where we have all types of loops and rings in are older portion of our system. We have stations where we have multiple transformers in parallel that feed a linkage bus, which is then paralleled with the individual bus's, with operating points to sectionalize if needed. We have looped power lines that come of the different bus's from two positions that feed out and are tied all the way through. We have networks where we bank all the secondaries. The older portions of our system were built with loops and rings in the stations, on the lines, and in the secondary for reliability. It doesn't really have to do with loading due to the fact that if you take a portion of the system out of service it now becomes a radial feed and may not be able to handle the loading. we also have distribution lines that are a 4.8kv ungrounded delta that are ringed as well. Wire comes down/tree on the line, theres no fault since its ungrounded, and the lights stay on since its a ring. The relaying and voltage controls in this part of our system are very complex though compared to our 13.2kv wye system which is all radial feeds.
 
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