Rish Relay 252-PDx - DC Voltage Relay
The DC voltage protectors provide continuous surveillance of the monitored circuit. When the measured voltage moves outside the set-point limits, the relay will operate after the selected time delay or differential, giving an alarm and/or initiation signal.
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- 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-energize 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 will energize. The time delay is not active when resetting.
Overvoltage models: When the monitored voltage exceeds the setpoint, the time delay is started. When the time has elapsed, the relay will energize 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-energizes. The time delay is not active when resetting.
Applications
The protectors can protect for :
Under voltage
Overvoltage
Battery level control. An illuminated LED indicates when the relay is energized.
Relays normally energize on over-voltage and de-energize on under-voltage.
Battery supplies - To monitor correct terminal voltage and detect under or over-voltage conditions
Battery Chargers - To monitor the correct charging voltage is correct.
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