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Control and protection devices
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The RN-111M single-phase voltage monitoring relay

The RN-111M voltage monitoring relay is designed to de-energize an industrial/appliance single-phase 220V/50Hz load in case of inadmissible voltage variations in the mains with subsequent automatic re-energizing after the circuit parameters recovery.

The RN-111M voltage monitoring relay is designed to de-energize an industrial/appliance single-phase 220V/50Hz load in case of inadmissible voltage variations in the mains with subsequent automatic re-energizing after the circuit parameters recovery.

 

 

Load is connected to the relay either directly via relay terminals or through a magnetic starter, depending on the wattage. The relay can operate in four independent modes:

 

 

  • voltage monitoring relay;

 

  • minimum voltage monitoring relay;

 

  • maximum voltage monitoring relay;

 

  • time relay with a restart delay.

 

 

The device front panel features load status indicator (on/off) and three-digit, seven-segment display, which displays (depending on the device status):

 

 

  • actual RMS voltage;

 

  • accurate value of the set-up parameter;

 

  • time remaining till automatic load re-energizing;

 

  • emergency de-energizing the load (RMS voltage flashing).

 

 

The variable pot knobs on the front panel allow for setting:

 

 

  • the maximum allowable voltage tripping threshold;

 

  • the minimum allowable voltage tripping threshold;

 

  • time delay for load re-energizing after the circuit parameters recovery.

 

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