|
|
|
0 members (),
34
guests, and
11
robots. |
|
Key:
Admin,
Global Mod,
Mod
|
|
|
|
Joined: Jul 2007
Posts: 1,335
OP
Member
|
Providing a CT has the amperage output, can a single CT provide accurate signalling to two or more meters requiring a CT?
"Live Awesome!" - Kevin Carosa
|
|
|
|
|
Joined: Jul 2004
Posts: 783
Member
|
I will take a wild guess, but if the two meters are physically close AND you connect the two meter's CT inputs in SERIES, I think yes.
Acceptable practice, I do not know.
|
|
|
|
|
Joined: Apr 2002
Posts: 7,288 Likes: 4
Member
|
Another wild guess of 'yes'. Pondering a little deeper, I would venture a guess that as long as the 'meter' device doesn't exceed the power (correct term?) output of the CT, multiple 'meters' could be attached.
John
|
|
|
|
|
Joined: Jul 2007
Posts: 1,335
OP
Member
|
It makes sense to me, but would degrade the accuracy is what I'm concern.
"Live Awesome!" - Kevin Carosa
|
|
|
|
|
Joined: Jul 2004
Posts: 9,677 Likes: 9
Member
|
My guess is the manufacturer will not guarantee the accuracy if it is not installed exactly the way they say.
Greg Fretwell
|
|
|
|
|
Joined: Nov 2000
Posts: 2,148
Member
|
CTs have a rated maximum current output and a maximum circuit resistance. As long as the load of the multiple meters is below the maximum permitted load, there will be no issues with the operation or accuracy. http://www.nktechnologies.com/pdfs/ct-tutorial.pdf
Don(resqcapt19)
|
|
|
|
|
Joined: Jul 2001
Posts: 599
Member
|
In the days of electromechanical meters it was standard practice to provide a single set of CT's to feed both the Ammeter and the Wattmeter. Even in today's world of electronic meters it is still common.
However, it is rare that a protective device and a meter will share a single set of CT's (although it seems common in MV starter applications).
|
|
|
|
Posts: 440
Joined: December 2001
|
|
|
|
|
|
