Description
The Littelfuse 102A2 is a 3-phase voltage monitoring relay designed to protect motors and industrial equipment from harmful power conditions in 190–480V AC systems. This intelligent device continuously monitors voltage quality and detects issues such as phase loss, phase reversal, voltage unbalance, undervoltage, and overvoltage. When a fault condition is detected, the relay quickly disconnects the load to prevent equipment damage and reduce downtime. With adjustable restart delay and microcontroller-based sensing, the 102A2 ensures reliable protection for HVAC systems, pumps, compressors, and other critical motor-driven applications.
Key Features:
- 3-phase voltage monitoring protection relay
- Operating range: 190–480V AC (auto-ranging)
- Detects phase loss, phase reversal, and voltage imbalance
- Overvoltage and undervoltage protection
- Adjustable restart delay (reduces nuisance tripping)
- Microcontroller-based monitoring for high accuracy
- Ideal for motors, HVAC systems, pumps, and compressors
- Compact design for control panel installation
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