Littelfuse 460 3-Phase Voltage Monitor | 190–480V Adjustable Protection Relay

Description

The Littelfuse 460 is a microcontroller-based 3-phase voltage monitoring relay engineered to deliver continuous, dependable protection for motors and industrial equipment across 190–480V three-phase systems. It actively monitors for dangerous electrical conditions — including phase loss, phase reversal, voltage imbalance, overvoltage, and undervoltage — and responds instantly by disconnecting the output the moment a fault is detected. Once normal operating conditions are restored, the relay automatically resets, minimizing downtime and keeping equipment running efficiently. Adjustable trip and restart delay settings allow technicians to fine-tune response thresholds, eliminating nuisance trips in demanding environments. Whether protecting HVAC systems, compressors, pumps, or general industrial motors, the Littelfuse 460 provides the accurate sensing and long-term reliability that critical applications demand.

Key Features

• Wide input voltage range covers 190–480V three-phase systems
• Detects phase loss, phase reversal, and voltage imbalance in real time
• Guards against both overvoltage and undervoltage fault conditions
• Adjustable trip and restart delay settings minimize nuisance tripping
• Microcontroller-based design ensures precise, consistent monitoring performance
• Suitable for motors, compressors, pumps, HVAC, and industrial equipment