CT metering

[ggonza]

Just wondering if someone could point me in the right direction. Here's what I have.
A 4000A switchboard with multiple feeders for in-house retail stores and other loads to be metered. Metering will be done with CT's. The plan is to run one pipe big enough for all the CT wires to a seperate metering panel on the other side of the room. Switch board is 3-phase 277/480. I was thinking that running all the CT wires together might cause some unwanted induction from one set of wires to another. Can anyone offer any input on whether or not this scenario might cause problems. Any advice would be appreciated thank you.

 

[SG-1]

I do not see a problem with the layout.

The current output of the CTs is to low to cause any significant induction between conductors.

It is common practice in Medium Voltage Switchgear to bundle CT wiring from many CTs together and rout them to a relay in another cubicle many feet away. These CT wires are bundled with the wiring for control & heaters. The heater wiring can be carrying 30 amps or more in different places along the way.

 

[Open Neutral]

Further, the impedance of the CT->meter loop will be VERY low.....

 

[ggonza]

Great, thanks for the replies. The reason I worried is because I know the current is low, I thought the metering would be more sensitive. But thank you for the affirmation.