CT's In Switchgear

[Alwayslearningelec]

Are CT's that are in switchgears considered a meter? DOes the switchgear vendor normally provide the CT's? THanks.

 

[iwire]

In my area we would provide the switchgear with provisions for the utility to mount their CTs to. We do not provide the CTs, I think the power company likes to supply their own cash register.

 

[zog]

All depends on what is speced, but normally all the CT's should come with the gear.

Your question is a little vauge, some of us picture different things when you say "switchgear", can you provide some more info?

 

[iwire]

All depends on what is speced, but normally all the CT's should come with the gear.

In what applications?

If the CTs are there for utility metering we never supply them, obviously if the CTs are in place for GFP or the customers own metering we provide them.

 

[jumper]

Here is a new install booklet from my old POCO. Towards the end it specifies different scenarios about who provides what.

Different POCOs will have own rules. You POCO should have something similar, probably online.

http://www.dom.com/dominion-virginia-power/customer-service/for-businesses/pdf/bluebook.pdf

 

[zog]

In what applications?

Switchgear, metal enclosed switchgear with power circuit breakers. Not an oversized panel for a Taco Bell. As usual we have different things in mind so lets see what the OP is asking about, but based on most of his other posts I think he and I are on the same page.

 

[Alwayslearningelec]

In my area we would provide the switchgear with provisions for the utility to mount their CTs to. We do not provide the CTs, I think the power company likes to supply their own cash register.

lol.. i hear ya..but installed by EC, right?

 

[Alwayslearningelec]

THis is an old drawing I came across and was wondering..MV gear

 

[jumper]

lol.. i hear ya..but installed by EC, right?

Maybe, but not always by any means.

 

[rbalex]

THis is an old drawing I came across and was wondering..MV gear

The CTs shown on that snipet have nothing to do with metering. They are part of various forms of protection. I see differential, and both line and ground overcurrent protection indicated.

 

[hillbilly1]

Most, but not all utilities prefer a seperate enclosure for their metering equipment, Just got back from looking at some gear in Minnesota, where one store had the metering equipment as part of the gear, complete with padlock and seal, but another store a few miles away had a CT cabinet outside. The majority of the POCO's here in the south mount their CT's in transformers on the stabs. In Indianna I've seen special cabinets that look like cellar doors that house the CT's on buss bars.

 

[zog]

THis is an old drawing I came across and was wondering..MV gear

HA! Take that iWire, I assumed right for once

Horsegoer, I see CT's on the drawing, are you saying someone provided you with MV gear, Schweitzer relays, and no CT's??