Description
The Littelfuse PLM6405 is a 3-phase line monitor relay designed to continuously supervise voltage conditions in industrial and commercial electrical systems. It monitors all three phases in both delta and wye configurations without requiring a neutral connection, ensuring reliable protection across a wide range of installations. Utilizing microcontroller-based circuitry, the PLM6405 detects and protects against undervoltage, voltage unbalance, phase loss, and phase reversal, helping prevent equipment damage and downtime. The unit features an SPDT output relay that responds to fault conditions with a built-in time delay, along with LED indicators for clear status monitoring and diagnostics. With automatic reset functionality and robust performance, this line monitor is ideal for safeguarding motors, compressors, and other three-phase equipment.
Key Features:
- Monitors 3-phase systems (delta or wye) without neutral connection
- Protects against undervoltage, voltage unbalance, phase loss, and phase reversal
- Microcontroller-based design for accurate and reliable monitoring
- SPDT relay output for flexible control integration
- LED indicators for real-time status and fault diagnostics
- Automatic reset when fault conditions are corrected
- Compact 8-pin plug-in design for easy installation
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