Replaced legacy DCB protection with a modern four-terminal 87L differential scheme over Ethernet, improving fault detection speed and security. Utilized four SEL-411L relays, SEL-ICON multiplexers, ...
On September 12, 2019, a pair of SEL-T400L Time-Domain Line Protection relays detected a B-phase-to-ground fault while protecting the Public Service Co. of New Mexico (PNM) 109-mile 345 kV ...
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