HRN-54N voltage monitoring relay

Monitoring voltage relay HRN-54N 
Serves to monitor voltage , phase failure and sequence in switchboards, protection of devices 
DESCRIPTION 
Serves to monitor voltage , phase failure and sequence in switchboards. 
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 (Uoff lower level)relay immediately breaks with no delay 
It is possible to set upper and lower level of monitoring voltage.