Description
The Littelfuse 355400 SymCom Motor Saver is a 3-phase voltage monitoring relay designed to protect motors and industrial equipment operating on 380–480V systems. It continuously monitors voltage conditions and quickly responds to faults such as phase loss, voltage imbalance, phase reversal, overvoltage, and undervoltage. When abnormal conditions are detected, the device de-energizes its output relay to prevent motor damage and costly downtime. With adjustable trip and restart delay settings, it helps reduce nuisance tripping while ensuring reliable protection in demanding environments such as HVAC systems, pumps, and industrial automation.
Key Features:
- 3-phase voltage monitoring for 380–480V systems
- Protects against phase loss, phase reversal, and voltage imbalance
- Overvoltage and undervoltage protection
- Adjustable trip and restart delay settings
- SPDT relay output for flexible control integration
- Microcontroller-based monitoring for accurate performance
- Ideal for HVAC, pumps, compressors, and industrial motors
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