utility PT/CT secondary circuit
utility PT/CT secondary circuit
(OP)
Hi all,
we need to connect utility's PT/CT secondary circuit to the meters (100 m away), we would like to use the same duct bank (concrete encased) we use for power cables (25kV),
Is this possible to do?
I'm worried about power cables interfering with the secondary signal from the PT/CT. I didn't ask utility measurement guys yet , just wanted to have your opinions/experiences first.
Thanks
we need to connect utility's PT/CT secondary circuit to the meters (100 m away), we would like to use the same duct bank (concrete encased) we use for power cables (25kV),
Is this possible to do?
I'm worried about power cables interfering with the secondary signal from the PT/CT. I didn't ask utility measurement guys yet , just wanted to have your opinions/experiences first.
Thanks






RE: utility PT/CT secondary circuit
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: utility PT/CT secondary circuit
RE: utility PT/CT secondary circuit
it will be in dedicated conduit but common duct bank. I contacted my utility meter department, waiting for an answer.
Have you ever seen this type of installation? Power cables and meter cables are going to the same place...so I think it makes sense using only one duct bank.
I will update this thread as soon as I get an answer from utility guys.
Thanks
RE: utility PT/CT secondary circuit
RE: utility PT/CT secondary circuit
I assumed you mean to only share the ductbank not the conduit or ducts with the power conductors. Separate conduit always..as david said.
RE: utility PT/CT secondary circuit
Yes it will be separate conduit for sure, it is part of utility standards, just not sure if I can put these conduits in the same ductbank with power cables, still waiting an answer from utility.
JL
RE: utility PT/CT secondary circuit
RE: utility PT/CT secondary circuit
As long as the CT burden rating is sufficient, the length shouldn't be a problem. Runs of that long are quite common in substation environments.
Length is not an issue for the PT circuit.
RE: utility PT/CT secondary circuit
RE: utility PT/CT secondary circuit
RE: utility PT/CT secondary circuit
davidbeach you're right, the best thing to do is having your design approved by utility metering guys right from the start.
in my case they accepted it.
thanks for your comments
JL