I forgot my password.
Don't have an account?
What is the (through PLCC) carrier send, carrier receive, direct trip receive?
You dont need to know this, as I understand from your question.
Download the free GE "Art & Science of Protective Relaying" book from the following site, and check out Chapter 6 on Carrier Current Pilot relaying.
http://www.gedigitalenergy.com/multilin/notes/artsci/index.htm