Description
The Littelfuse 460-VBM is a microcontroller-based, three-phase voltage monitoring relay engineered to deliver reliable protection for motors and industrial electrical systems across a wide 190–480V AC operating range. By continuously monitoring all three phases in real time, the 460-VBM detects dangerous power quality events — including phase loss, phase reversal, undervoltage, overvoltage, and voltage imbalance — before they cause costly equipment damage or unplanned downtime.
When a fault condition is identified, the relay output de-energizes after a user-defined trip delay, then automatically resets once stable voltage is restored following a programmable restart delay. This intelligent auto-recovery behavior eliminates nuisance tripping in environments with fluctuating power supply, keeping your systems running efficiently and safely. The 460-VBM is a trusted solution for motor control panels, pumps, compressors, and HVAC applications that demand dependable voltage monitoring and protection.
Key Features
- 190–480V AC three-phase voltage monitoring range
- Detects phase loss, phase reversal, and voltage imbalance
- Protects against undervoltage and overvoltage conditions
- Adjustable trip delay (1–30 seconds) and restart delay (1–500 seconds)
- Microcontroller-based design for precise, reliable fault detection
- Flexible DIN rail or surface mount installation
- Ideal for motors, compressors, pumps, and HVAC systems
- Reduces equipment damage, downtime, and nuisance tripping
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