Correct notation for current Differential Scheme for Auto Transformer
Correct notation for current Differential Scheme for Auto Transformer
(OP)
We use 87 to denote bias Differential function.My question is what no is appropriate to denote current differential scheme applied on auto transformer where CTs from HV side , LV side and Neutral point with identical ratio are summed on per phase basis.In my view the no 64R is not appropriate as the scheme will detect both phase and ground faults.






RE: Correct notation for current Differential Scheme for Auto Transformer
RE: Correct notation for current Differential Scheme for Auto Transformer
RE: Correct notation for current Differential Scheme for Auto Transformer
http://GeneralPAC.com - Awesome video tutorials for power systems PAC!
The Wye Wye Transformer Connection video: http://gpac.link/1GdGRSQ
RE: Correct notation for current Differential Scheme for Auto Transformer
RE: Correct notation for current Differential Scheme for Auto Transformer
I don't think there is a "phase" detector relay ANSI device number. Otherwise that would make things a little easier. So you'll have to be creative with how you use these device numbers. 64P is a suggestion given the circumstance.
http://GeneralPAC.com - Awesome video tutorials for power systems PAC!
The Wye Wye Transformer Connection video: http://gpac.link/1GdGRSQ