Voltage monitoring relay HRN-57N 7515

• It is used for voltage monitoring in the switchboard (protection of devices and equipment).
• It monitors the voltage magnitude in a 3-phase voltage system.
• The relay does not monitor the phase sequence.
• It is possible to set the upper and lower voltage limits at which the output relay contact will trip.
• Adjustable time delay eliminates short-term spikes and outages in the network.
• If the supply voltage drops below 60% Un (_UOFF lower level), the relay will immediately trip without applying a delay.
• HRN-57: power supply from all phases i.e., the relay function is maintained even if one of the phases fails.
• HRN-57N: power supply to L1, L2, L3-N, i.e., the relay also monitors for interruption of the neutral conductor.
  

Technical parameters

• Phase failure: Yes
• Phase sequence: x
• Adjustable overvoltage: Yes
• Adjustable undervoltage: Yes
• Asymmetry: x
• Monitored range: AC 3 x 172-287 V
• Output: 1x switching, 8 A
• Design: 1-MODULE
• Supply voltage: from monitored voltage
• Dimensions: 90 x 17.6 x 64 mm