6.6K views · 189 reactions | On this day 35 years ago, Dr. Schweitzer shipped the very first product that started it all—the SEL-21! If you're asking yourself "What's an SEL-21?" or "What does SEL even do?", this is the video for you. Check it out! | SEL Community—Schweitzer Engineering Laboratories | Facebook
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6.6K views · 189 reactions | On this day 35 years ago, Dr. Schweitzer s…
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4K views · 228 reactions | Now available: the SEL-T401L Ultra-High-Speed Line Relay—a new transmission line relay that combines time-domain technology and phasor-based protection in a single device. Learn more: https://bit.ly/2QRzQAd | SEL Community—Schweitzer Engineering Laboratories | Facebook
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4K views · 228 reactions | Now available: the SEL-T401L Ultra-Hig…
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