Littelfuse VM110 Voltage Monitoring Relays
Littelfuse VM110 Voltage Monitoring Relays are designed for electrical systems to ensure reliable and safe operation. These relays monitor the sequence of phase voltages, preventing incorrect rotation of three-phase motors, detecting undervoltage conditions, and identifying overvoltage situations. By monitoring these conditions, the VM110 relays from Littelfuse protect equipment from potential costly or critical damage, malfunction, or operational failure. Additional features include adjustable setpoints for undervoltage and overvoltage thresholds and phase sequence detection, providing a voltage protection solution in industrial applications.
Features
- Compact design
- Multi-voltage
- Selectable undervoltage and overvoltage levels
- Adjustable time-delay
- One C/O configuration
- LED indication for all faults
- Protects against phase loss, phase reversal, and phase asymmetry
- Improved accuracy
- High reliability
- Quick visual indicator for the cause of the trip and relay status
Applications
- Building systems
- HVAC compressors
- Lifts
- Escalators
- Industrial machines
- Conveyors
- CNCs
- Packaging lines
- Water and waste
- Irrigation pumps
- Lift stations
- Cooling towers
- Refrigeration and cooling
- Rooftop ACs
- Supermarket systems
Specifications
- 17.5mm wide
- 208VAC to 480VAC voltage range
- 4.5VA maximum power consumption
- -15°C to +60°C operating temperature range
- 17.5mm x 58.5mm x 90mm dimensions
- IP20 protection for terminals
- IP40 protection for housing
- IP50 protection for front facia
- Base/DIN-rail mounting
Dimensions
Published: 2025-09-29
| Updated: 2025-10-16