Description
The Littelfuse 35020028 delivers reliable, continuous 3-phase power quality monitoring for industrial motors and critical equipment operating on 190–240VAC systems. Part of the proven 350 Series, this relay instantly detects abnormal phase conditions — including phase loss, phase reversal, voltage imbalance, and over/undervoltage faults — and trips its output to isolate and protect connected equipment before damage occurs.
Built around a precision microcontroller-based monitoring circuit, the 35020028 provides exceptional accuracy and fast response times in demanding industrial environments. Integrated LED diagnostic indicators deliver at-a-glance fault identification, reducing troubleshooting time and minimizing costly downtime. The DPDT (Form C) relay output offers flexible integration into a wide range of control panel configurations.
This relay is well suited for protecting motors, pumps, compressors, HVAC systems, and industrial automation equipment wherever three-phase power integrity is critical.
Key Features
- Continuous 3-phase voltage monitoring for proactive equipment protection
- Operating voltage range: 190–240VAC
- Detects phase loss, phase reversal, voltage imbalance, overvoltage, and undervoltage faults
- DPDT (Form C) relay output for versatile control panel integration
- Microcontroller-based design ensures high monitoring accuracy and fast fault response
- Advanced LED diagnostic indicators for rapid fault identification and reduced downtime
- Heavy-duty construction built for reliable performance in industrial environments
- Ideal for motors, pumps, compressors, HVAC systems, and automation equipment
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