Description
The Littelfuse 460-15 is a microcontroller-based 3-phase voltage protection relay engineered to keep motors, compressors, pumps, and HVAC systems running safely in demanding industrial environments. Continuously monitoring across a wide 190–480V range, it instantly detects phase loss, phase reversal, undervoltage, overvoltage, and voltage imbalance — the most common causes of costly motor failure and unplanned downtime.
When an out-of-range condition is detected, the output relay trips after a user-defined delay and automatically resets once stable voltage is restored. Fully adjustable trip and restart delays give technicians precise control over system response, dramatically reducing nuisance trips without sacrificing protection.
Key Features
- Wide 190–480V three-phase voltage monitoring range suits a broad range of 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 (1–30 seconds) minimizes nuisance tripping in fluctuating environments
- Adjustable restart delay (1–500 seconds) allows controlled, safe system recovery after a fault
- Microcontroller-based design delivers precise, reliable monitoring and consistent relay control
- Suitable for motors, compressors, pumps, HVAC equipment, and general industrial machinery
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