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The RS PRO 223‑7791 is a compact, DIN‑rail mountable phase monitoring relay engineered to deliver dependable three‑phase power oversight. Featuring SPDT contacts, this relay continuously monitors all phases and provides fast-acting protection against over‑voltage, under‑voltage, phase loss, phase reversal, and asymmetry—helping secure motors, machinery, and electrical systems from harm. With durable construction, adjustable thresholds, and LED indicators, it’s ideal for diverse industrial control and distribution applications.
If you're looking to safeguard your electrical setup proactively, this monitoring relay is an excellent investment. It offers versatile voltage-range support (208–480 VAC for 3‑wire or 120–277 VAC for 4‑wire systems), customizable voltage and timing thresholds, and is housed in an ultra-slim 17.5 mm casing—perfect for tight control panels. Choose it to ensure reliable, real-time protection, save valuable floor space, and reduce downtime.
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