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Carthage water utility says two unusual outages at SPA substation in one week caused by separate events
Summary
The general manager of Carthage Water & Electric told the City Council that two separate outages at the SPA substation — one last week and another the morning of March 11 — cut power to the city. The utility and the Southwest Power Administration are investigating; SPA will replace damaged switchgear and take preventive steps, the manager said.
Chuck Bryant, general manager of Carthage Water and Electric Plant, told the City Council on March 11 that the city experienced two separate outages linked to the Southwest Power Administration (SPA) substation south of Carthage — one the previous Monday and a second the morning of March 11. "When that happens, it shuts the power off to the entire city," Bryant said, describing how a relay or switch opens to protect transformers when a fault occurs.
Bryant said Carthage receives transmission power on 161 kV lines that step down through two transformers at the SPA site; one transformer feeds Carthage Water and Electric and the other is used by the neighboring utility. He…
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