Comparison of Standardized Protocols Available to Replace Substation Copper Field Wiring With Digital Communications D. J. Dolezilek and A. Kalra Schweitzer Engineering Laboratories, Inc. Presented at the XIV Simposio Iberoamericano Sobre Proteccion de Sistemas Electricos de Potencia Monterrey, Mexico February 18–22, 2019 Originally presented at the 14th International Conference on Developments in Power System Protection, March 2018