Wilmar Electronics Over/Undervoltage Relay Model 255X

The Wilmar Electronics Model 255X is a robust over/undervoltage relay designed for protecting electrical systems in industrial and aerospace applications by monitoring voltage levels in 3-phase, 3-wire systems. Operating at 460 volts line-to-line with a frequency range of 50-400 Hz, this relay detects deviations from set voltage thresholds, triggering protective actions to prevent equipment damage from power fluctuations. Key features include adjustable overvoltage and undervoltage setpoints via front-panel knobs, allowing precise customization for specific operational needs. It supports connections for phases 1-3 and neutral, making it versatile for various electrical configurations. Advantages over similar products include its wide frequency compatibility, ideal for variable-speed drives or aircraft systems, and its durable metal enclosure that withstands harsh environments. Benefits encompass enhanced system reliability, reduced downtime, and easy integration into control panels. Drawbacks may include its vintage design lacking modern digital interfaces, potentially requiring manual adjustments and limiting remote monitoring capabilities. Commonly used in manufacturing, power distribution, and aviation settings, this relay ensures safe operation by isolating circuits during voltage anomalies. Based on image analysis, the unit appears used with minor surface wear, no visible damage, and intact faceplate details including model, voltage, and frequency ratings. No serial number is clearly visible, and there are no attached parent/child assets like sensors. Estimated dimensions and weight are derived from visual scaling against standard components. For resources, refer to manufacturer archives or similar models; a datasheet summary indicates typical response times under 100ms and contact ratings up to 10A. Comparable listings suggest a used market value around $200-400 USD.