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An Under/Over Voltage Relay is a protective device designed to continuously monitor the supply voltage and safeguard electrical equipment from damaging voltage fluctuations. It detects when the voltage drops below a preset minimum (undervoltage) or rises above a preset maximum (overvoltage) and instantly triggers an output to disconnect the load, preventing overheating, insulation failure, or equipment malfunction. These relays come with adjustable voltage thresholds, time delay settings, and clear LED indicators for easy status monitoring. Many models also feature wide input ranges, precise sensing accuracy, and compact DIN-rail mounting for seamless integration into control panels. Under/Over Voltage Relays are widely used in motor protection, automation panels, building electrical systems, pump controls, and industrial machinery where maintaining stable operating voltage is essential for equipment safety, efficiency, and longevity.
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