Monitoring voltage relay
HRN-57

DESCRIPTION

• Relay doesn’t monitor phase sequence.
• Supply is done from monitored voltage.
• Fixed T1(500ms) and adjustable T2 (0.1 – 10 s) delay to eliminate short voltage drops and peak.
• In case supply voltage falls below 60 %Un (U off lower level) relay immediately switch OFF with no delay.
• It is possible to set upper and lower level independently.
• Monitoring voltage relay in two variants:

HRN-57: supply from all phases, means that relay is functional also in case of failure in one phase
HRN-57N: supply L1-N, means that relay monitors also failure of neutral wire, replacement for HRN-52

• Faulty state is indicated by red LED and by breaking output relay contact.

TECHNICAL PARAMETERS

• Monitored power voltage: 

HRN-57: 3 x 400 V 
HRN-57N: 3 x 400 V/ 230 V

• Umax: 105 – 125% of monitored voltage.
• Umin: 75 – 95% of monitored voltage.
• Output contact: 1x changeover 8 A/250 V AC1 (AgNi, 2500 VA)

Downloads

• Datasheet HRN 57 57N

  Format: pdf | Size: 1 MB | 26. 05. 2020

• Manual HRN-57 57N

  Format: pdf | Size: 216 kB | 26. 05. 2020

• Manual multilanguage HRN-57 57N

  Format: pdf | Size: 2 MB | 01. 07. 2020