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Replacement of electromechanical line relays with an SEL-311L relay, which was the primary relay and performed current differential relaying, and an SEL-421 relay, which served as the secondary relay and performed impedance-based protection of the line.
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Updating the relaying one-line, DC/AC schematics and wiring diagrams to reflect the relay replacements.
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Developing Remote Terminal Unit (RTU) drawings along with all the data points at the substation.
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Creating fiber patch panel drawings for OPGW connection of the line relays at both line terminals.
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Performing IEEE 485 based battery calculation for the substation.
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Working closely with the testing crew for the commissioning of the new installation.