This is a SEG (Schaltanlagen-Elektronik GmbH) STROMRELAIS (Current Relay), specified as model IWÜ-2-3/S. This industrial protection device is commonly used for time-dependent overcurrent protection in three-phase electrical systems, safeguarding equipment from excessive current flow. The specific factory number is 41484-24-74. The relay unit features an adjustable current scale (Strom A) and time delay scale (Zeit/sek) on the front face, allowing customization of protection parameters. It is rated for connection to 3x5A Current Transformers (CTs). Note: The specific unit in the photos is marked IÜU-2-3/B, but shares the same basic design, physical layout, and electrical specifications with the IWÜ-2-3/S variant. SEG, STROMRELAIS, IWÜ-2-3/S, IÜU-2-3/B, Overcurrent Protection, Time Relay, Pr.
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