Description
The Littelfuse 460-14 is a microcontroller-based 3-phase voltage monitoring relay built to deliver dependable protection for motors, compressors, HVAC systems, and industrial electrical equipment. Continuously scanning line conditions across a wide 190–480V operating range, it responds instantly to dangerous faults — disconnecting the output relay to isolate connected equipment before damage can occur. Once stable power conditions return, the unit automatically restores operation, minimizing downtime without manual intervention. Adjustable trip and restart delay settings give technicians precise control over response timing, reducing nuisance trips in environments where momentary power fluctuations are common.
Key Features
- Wide 190–480V three-phase voltage monitoring range suits diverse industrial applications
- Detects phase loss, phase reversal, and voltage imbalance for comprehensive fault coverage
- Guards against both overvoltage and undervoltage conditions to extend equipment life
- Adjustable trip delay and restart delay settings minimize nuisance tripping
- Microcontroller-based design delivers precise, repeatable voltage monitoring
- Ideal for motors, compressors, HVAC equipment, and general industrial systems







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