Description
The Littelfuse 201A-AU-OT is a 3-phase plug-in voltage monitoring relay designed to protect motors and industrial equipment operating within 190–480VAC systems. This advanced auto-ranging device continuously monitors all three phases for abnormal power conditions such as phase loss, phase reversal, undervoltage, overvoltage, and voltage unbalance. When a fault is detected, the relay output deactivates to prevent equipment damage and automatically restores operation once voltage conditions return to normal. Its adjustable settings for trip delay, restart delay, and voltage unbalance provide flexible protection for a wide range of motor-driven applications. The plug-in design allows easy installation in control panels and industrial automation systems.
Key Features:
- 3-phase plug-in voltage monitoring relay
- Operating range: 190–480VAC, auto-ranging
- Detects phase loss, phase reversal, and voltage imbalance
- Overvoltage and undervoltage protection
- Adjustable trip delay and restart delay settings
- Voltage unbalance protection for added motor safety
- Microcontroller-based sensing for accurate monitoring
- Ideal for HVAC, pumps, compressors, and industrial motors
Reviews
There are no reviews yet.