Gen diff protection: grounding connection on CT secondary
Gen diff protection: grounding connection on CT secondary
(OP)
Hi all,
I have a question of installation of CT link to differential protection relay, please see attached file.
The problem is secondary CT connection was connect to ground oppose to generator terminal on both side which normal scheme will connect to ground on generator terminal side. (it could be better to see attached file)
So can I use this scheme for 87 protection? and are there any effect to the circuit or relay operation?
Thanks for helps.
Psit
I have a question of installation of CT link to differential protection relay, please see attached file.
The problem is secondary CT connection was connect to ground oppose to generator terminal on both side which normal scheme will connect to ground on generator terminal side. (it could be better to see attached file)
So can I use this scheme for 87 protection? and are there any effect to the circuit or relay operation?
Thanks for helps.
Psit






RE: Gen diff protection: grounding connection on CT secondary
NO effect to the relay operation.
Diff current is still =0.
Regards.
Slava
RE: Gen diff protection: grounding connection on CT secondary
I ask because maybe the relay (if it's digital) has a setting where you can change the polarity of the currents you are reading?
I'm not as familiar with the electromechanical... I would think you'd have to have your CT coils wired correctly to make them work properly.
RE: Gen diff protection: grounding connection on CT secondary
RE: Gen diff protection: grounding connection on CT secondary