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Elko HRN-54 Three Phase Network Monitoring Voltage Relay


  • 3-phase 3-wire operation
  • Under voltage, over voltage and phase sequence monitoring
  • Nominal input voltage 400Vac
  • Overvoltage setting (Vmax) 105…125% Vnom
  • Undervoltage setting (Vmin) 75…95% Vnom
  • 5% hysteresis
  • Adjustable trip delay 0.5…10 sec
  • 1 Changeover contact
  • Auxiliary self supplied


Monitoring voltage relay HRN-54, HRN-54N
Supply L1-N (monitors also disconection of neutral wire). All parameters adjustable by potentiometers serves to monitor voltage, phase failure and sequence in switchboards, protection of devices in 3-phase mains.

It is possible to set upper and lower level of monitoring voltage.
Adjustable time delay eliminates short voltage peaks and failures in the main supply is done from monitored voltage.
Faulty state is indicated by red LED and by breaking output relay contact.
Output contact 1 x changeover 8A /250 V AC1
In case supply voltage falls below 60% Un (Uoff lower level)relay immediately breaks with no delay.

HRN-54 – supply from all phases which means that relay is functional also in case when one phase is faulty. HRN-54N – supply L1-N, means that relay monitors also failure of neutral wire.

1-MODULE, DIN rail mounting

Additional Information

Manufacturer Elko
Product Name / Options Price (ex VAT)
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