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BusBar Disconnects
5

BusBar Disconnects

BusBar Disconnects

(OP)
What is the purpose of manufacturers/engineers placing disconnects smack in the middle of busbars? Seems pointless, and if anything reduces the availability of any one busbar. Anyone agree this is pointlessly stupid?




https://www.youtube.com/watch?v=k-Oonc1JCLk

RE: BusBar Disconnects

It allows deenergized work on a bus section to occur.

RE: BusBar Disconnects

In GIS, this will increase availability and service continuity during repair works involving bus section or sections adjoining bus sections.

RE: BusBar Disconnects

Pallet jack, what is the reason of using the word “stupid”. It is this a professional language?

RE: BusBar Disconnects

(OP)
@PalletJack: You don't have single breaker double bus GIS in the US, so I'm not sure how you could understand either since you've never worked in such a substation, going by your inference. 3eyes


@Stevenal: I get that, but isn't that why the bus is replicated to begin with? Just place everything on the A bus and take the B bus out of service and visa versa. Seems overly complicated, especially for a 6/7 bay station like this.

RE: BusBar Disconnects

(OP)
@Cuky2000: PalletJack is simply a detractor. A repudiation complex was triggered in him from me challenging the unbiased nature of the NFPA (or lack there of) on another professional forum a while back. Resulting he now trolls me in every thread with the goal of 1) discrediting my knowledge 2) calling my character/intent into question 3) pushing psychological buttons in hopes of provoking an outburst whereby I can be suspended from these forums based on belligerent conduct.

A certain percentage of individuals exist who do not like authority challenged, being compelled by chauvinism and exceptionalism, in thwarting dissenting opinions so as to de-rail any meaningful discussion or change.

Just a heads up as to where the players stand.




RE: BusBar Disconnects

2

Quote (I get that, but isn't that why the bus is replicated to begin with? Just place everything on the A bus and take the B bus out of service and visa versa. Seems overly complicated, especially for a 6/7 bay station like this.)

Important points in GIS:
1. Repair works can take long time, may be ~3 months depending on spares required.
2, In case of fault between Bus-1 & Bus-2 disconnector (GC-03), both bus shutdown is required during repair work.

RE: BusBar Disconnects

(OP)
Sushilksk: Thank you! This is the explanation I was looking for! That would make a lot of sense now that I think about it- purple star given. smile


I'm attaching 3 PDFs on the subject of GIS continuity- asking out of curiosity- but could the GIS bus and isolator partitions be designed such that busbars do not need to be taken out of service for repair on section GC-03? I'm guessing no in that from what I'm reading the neighboring compartment (that would the isolators GC-01 and GC-02) needs to be at reduced SF6 pressure during repair of GC-03 even (if) gas tight barriers existed between each busbar and GC-01 and GC-02.

https://files.engineering.com/getfile.aspx?folder=...

https://files.engineering.com/getfile.aspx?folder=...


https://files.engineering.com/getfile.aspx?folder=...

You've given me a lot to think about... let me think some more... I may have to withdraw my statement in regards to GIS substations.











RE: BusBar Disconnects

Quote (asking out of curiosity- but could the GIS bus and isolator partitions be designed such that busbars do not need to be taken out of service for repair on section GC-03)


That would require more partitions, more space, more cost, more chamces of failure...

RE: BusBar Disconnects

(OP)
Alright, so off the cuff I drew this up. I added an extra partition between SS3 and SS7, also SS4 and SS7. Ditto for the busbars where the disconnects have a barrier between them and each bus.





Would this work, in theory at least? Cost, space and complexity noted and I am in agreement.



(and yuppers the isolators and breaker are drawn the wrong direction)

RE: BusBar Disconnects

Quote (Cuky2000)

Pallet jack, what is the reason of using the word “stupid”. It is this a professional language?

It was the phrase he used in the OP. That’s why it was in quotation marks.

RE: BusBar Disconnects

(OP)
Perhaps I used the wrong choice of words in my original post- and for that I offer my sincere apologies to everyone in this thread.

RE: BusBar Disconnects

On topic, IMO SS6, SS8, SS10, SS12 & SS15 are not required.

RE: BusBar Disconnects

(OP)
Valid point. Though I'm having a hard time giving up SS6.

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