Applications
The protectors can protect for :
  • Under voltage
  • Over voltage
  • Battery level control. An illuminated LED indicates when the relay is energised.
  • Relays normally energise on over voltage and de - energise on under voltage.
  • Battery supplies - To monitor correct terminal voltage and detect under or over voltage conditions
  • Battery Chargers - To monitor correct charging voltage is correct.
 
Features
  • Adjustable Setpoint
  • Adjustable time delay
  • Internal differential (factory settable)
  • LED trip indication
  • 2 pole relay contacts
  • Adjustable Differential (252 PDE only)
  • Internal time delay (252 PDE only)
  • Auto Reset
 
Product Function
Under Voltage models : When the monitored voltage falls below the setpoint, the time delay is started. When the time has elapsed, the relay will de -energise and the red LED will extinguish to indicate the trip condition. The relay will automatically reset once the monitored voltage rises above the setpoint plus the differential. When reset, the LED will illuminate and the relay energise. The time delay is not active when resetting.
 
Over Voltage models : When the monitored voltage exceeds the setpoint, the time delay is started. When the time has elapsed, the relay will energise and the red LED will illuminate to indicate the trip condition. The relay will  automatically reset once the monitored voltage falls below the setpoint minus the differential. When reset, the LED will extinguish and the relay de - energise. The time delay is not active when resetting