It serves to control supply voltage for appliances sensitive to supply tolerance, protection of the device against under/over voltage.
HRN-3x is band voltage relay, HRN-6x is over/under voltage relay
Monitors voltage in range AC 48 - 276 V.
Umax and Umin can be monitored independently
Voltage Umin adjusted as % of Umax.
3-state indication - LEDs indicating normal state and 2 fault states.
Type of monitored voltage: AC
Monitored levels: undervoltage and overvoltage
Monitoring range: 48-276 V
Output: 1x CO, 16 A
Power supply: from monitored voltage
Dimensions: 90 x 17.6 x 64 mm (3.5˝ x 0.7˝ x 2.5˝)