Spot Network Collector Bus

[Grouch1980]

In a building in NYC that requires a 265/460 volt service, you'll need transformer vaults on the sidewalk and network compartments within the building, the network compartments being adjacent to the transformer vaults.

My question is, where is the collector bus located? Is the collector bus located on the load side of all the network protectors? And from the collector bus, that's where the 265/460 volts then goes into the Service Point? In the case of NYC, the Service End Box.

 

[infinity]

The collector bus is upstream of the service point. Typically they will have the substation transformers in the vault under the sidewalk > feeding the network protector via cables > feeding the welded aluminum collector bus > feeding the service. Between the collector bus and the service is usually a 5000 amp fuse for a 4000 amp service > from fuses stabs (in end box) to convert to cables typically 10 sets of 600 kcmil to service. Some photos:

Collector bus connection to network protector:

3Ø collector bus with bare neutral bus:


Stabs in end box transition to cables to service

 

[infinity]

End box connection to service:

 

[Alwayslearningelec]

The collector bus is upstream of the service point. Typically they will have the substation transformers in the vault under the sidewalk > feeding the network protector via cables > feeding the welded aluminum collector bus > feeding the service. Between the collector bus and the service is usually a 5000 amp fuse for a 4000 amp service > from fuses stabs (in end box) to convert to cables typically 10 sets of 600 kcmil to service. Some photos:

Collector bus connection to network protector:
View attachment 2571007
3Ø collector bus with bare neutral bus:
View attachment 2571008

Stabs in end box transition to cables to service

Those are stabs from the SEB provide by the gear vendor?

 

[infinity]

Those are stabs from the SEB provide by the gear vendor?

I think that those stabs are part of the ConEd Network.* The field work begins are the stabs.

*Edit-Looking at the photo again I'm not 100% sure that the stabs were provided by the switchboard manufacturer.

 

[Grouch1980]

End box connection to service:
View attachment 2571010

Sorry for the late response. Thanks Infinity for the pictures. Pictures say a lot!

The box at the very top... that's the Service End Box / Service Point? So on the other side of the wall is the network protector?

 

[Grouch1980]

In the first picture you posted, titled "Collector bus connection to network protector"... what angle is this? are we standing where the network protector would be, looking towards the collector bus?

 

[infinity]

Sorry for the late response. Thanks Infinity for the pictures. Pictures say a lot!

The box at the very top... that's the Service End Box / Service Point? So on the other side of the wall is the network protector?

Yes. On the other side of the wall is fuses that connect to the collector bus, sorry it's a bit blurry:

In the first picture you posted, titled "Collector bus connection to network protector"... what angle is this? are we standing where the network protector would be, looking towards the collector bus?

Standing in front of the network protector looking up. I have some more photos that I can post I just have to find them. Before the network protector was installed:

 

[Grouch1980]

Awesome, thanks!

 

[Grouch1980]

What is the depth of the network compartments and the transformer vaults? Con Edison's layout does not seem to indicate it... I attached their layout.

 

[Grouch1980]

So I almost found the depth requirements... if you look in Con Edison's EO-5023 document:

https://www.coned.com/-/media/files/coned/documents/es/specs/eo-5023.pdf

and go to section 13 (page 9), titled "space requirements", it leads you to EO-1114... and I cannot find this document on Google... can anyone help?

you would think putting all these requirements into ONE document, that is AVAILABLE for use... I don't know, maybe I'm reaching for the stars.

 

[Grouch1980]

Just bumping this up a little... anyone familiar with the height requirements?

 

[Grouch1980]

@infinity (or anyone):
Do you have any pics you can share of a Con Edison 120/208 volt transformer vault? Similar to above where you shared the pics of the network compartments (for a 265/4690 volt setup).

 

[infinity]

@infinity (or anyone):
Do you have any pics you can share of a Con Edison 120/208 volt transformer vault? Similar to above where you shared the pics of the network compartments (for a 265/4690 volt setup).

I don't have any 208Y/120 vault photos. From the non utility perspective there isn't much to see other than conduit penetrations and conductors.

 

[Grouch1980]

The collector bus is upstream of the service point. Typically they will have the substation transformers in the vault under the sidewalk > feeding the network protector via cables > feeding the welded aluminum collector bus > feeding the service. Between the collector bus and the service is usually a 5000 amp fuse for a 4000 amp service > from fuses stabs (in end box) to convert to cables typically 10 sets of 600 kcmil to service. Some photos:

What's the rating of the collector bus itself? Is it 5000 amps?

 

[infinity]

What's the rating of the collector bus itself? Is it 5000 amps?

I believe that it's much higher than 5000 amps. If you had 4 network compartments you would have 4 network protector switches feeding into the collector bus. I don't remember what each network protector was rated for. I might have a old photo of the nameplate if I can dig it up.