This paper suggests a process for performing consistent and thorough commissioning tests through many sources: breaking out relay logic into schematic drawings; using SER, metering, and event reports from relays; simulating performance using end-to-end testing and lab. This paper suggests a process for performing consistent and thorough commissioning tests through many sources: breaking out relay logic into schematic drawings; using SER, metering, and event reports from relays; simulating performance using end-to-end testing and lab. ronous optical transmission signal protection performance indicators. In this paper, the basic content of relay protection is described, the application of optical fiber communication technology, as well as the problems exposed in the practical application in the signal transmission channel is. This paper was presented at the 71st Annual Conference for Protective Relay Engineers and can be accessed at: https://doi. For the complete history of this paper, refer to the next page. Presented at the 5th Annual PAC World Americas Conference Raleigh, North Carolina. Working Group H9 of the IEEE Power System Relaying Committee Gary Michel Chairman, Greg Pleinka Vice Chairman, Mark Adamiak, Ken Behrendt, Doug Dawson, Ken Fodero, William Higinbotham, Gary Hoffman, Chris Huntley, Bill Lowe, Jerry Johnson, Ken Martin, Tim Phillippe, Roger Ray, Mark Simon, John. RED615 is a phase-segregated, two-end, line differential protection and control relay for protection, control, measurement and supervision of overhead line and cable feeders in utility and industrial power distribution networks, including radial, looped and meshed distribution networks, with or. So Fibre optic provides great advantage for Solkor differential protection relaying. Induced voltage is generated. Abstract—Performing tests on individual relays is a common practice for relay engineers and technicians. Most utilities have a wide variety of test plans and practices.