Description
The Littelfuse 460-575 is a microcontroller-based three-phase voltage monitoring relay engineered to deliver dependable protection for motors and electrical systems operating in demanding 475–600V AC environments. By continuously scanning line conditions in real time, it detects potentially damaging power anomalies — including phase loss, phase reversal, undervoltage, overvoltage, and voltage imbalance — before they cause costly equipment failures or unplanned downtime.
When a fault condition is identified, the relay output trips after a user-defined delay, then automatically re-engages once stable power is confirmed following the programmed restart interval. This combination of precise fault detection and intelligent auto-recovery makes the 460-575 an ideal solution for industrial motor control panels, commercial HVAC systems, compressor banks, and generator-fed 600V installations where power quality and system uptime are non-negotiable.
Key Features
- 475–600V AC three-phase voltage monitoring range
- Detects phase loss, phase reversal, and voltage imbalance
- Protects against both overvoltage and undervoltage conditions
- Adjustable trip delay (1–30 seconds) for customized fault response
- Adjustable restart delay (1–500 seconds) for controlled system recovery
- Microcontroller-based sensing for precise, reliable fault detection
- Suited for motors, HVAC systems, compressors, and generator applications
- Reduces risk of equipment damage and costly operational downtime
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