Key Specifications

• Function: Can operate as either an undervoltage or overvoltage relay.
• System Compatibility: Suitable for 3 AC systems.
• Power Supply: Draws power directly from the system it monitors.
• Energy Backup: Includes a built-in energy store that maintains operation for 5 seconds during voltage failure.
• Response Delay: Adjustable from 0.3 to 5 seconds.
• Release Delay: Fixed at 0.5 seconds.
• Alarm Indication: Red LED signals when voltage thresholds are exceeded or not met.

 Operating Modes

• Overvoltage Mode 

  • If one or more phase voltages exceed the preset value Y, the alarm LED lights up and the relay activates.
  • When voltage drops below Y + hysteresis (Hy), the LED turns off and the relay deactivates.

• Undervoltage Mode 

  • If phase voltages fall below Y, the alarm LED lights up and the relay deactivates.
  • When voltage rises above Y + Hy, the LED turns off and the relay reactivates.