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The ES-49 Temperature Relay is a microprocessor-based protection relay designed to monitor remote temperatures using resistance temperature detectors (RTDs). Available with three or six RTD inputs and compatible with copper or platinum RTDs, the ES-49 provides accurate temperature monitoring and dependable thermal protection for generators, motors, transformers, and other critical equipment. Advanced digital circuitry enhances performance and measurement accuracy, while built-in diagnostics continuously monitor relay health and indicate when relay functionality or accuracy may be compromised. With flexible RTD monitoring capabilities and rugged industrial design, the ES-49 offers an effective solution for protecting valuable equipment from overheating and temperature-related failures.