Quick Facts
- monitoring of DC and AC voltage in single-phase systems in 3 ranges
- voltage monitoring: in 2 independent levels (overvoltage/undervoltage)
- 2 versions, HRN-41: "HYSTERESIS" function and HRN-42: "WINDOW" function
- "MEMORY" function - for resetting from fault state to normal state - press "RESET
- function of the 2nd relay (independent/parallel)
- adjustable delay to avoid voltage peaks
- galvanic isolated supply
The relay is delivered in 2 variants - depending on how the voltage levels are set and monitored.
HRN-41 has a "hysteresis" function, i.e. only the upper level (Umax) is set and the lower level (Umin) is set in % of the upper level. Therefore, the lower level changes automatically as soon as the upper level changes.
HRN-42 has a "window" function, i.e. the upper level (Umax) and the lower level (Umin) are set individually in % of the monitored voltage. Both types have a "MEMORY" function. If the relay enters the fault state, the setting is stored until the reset button is pressed. DIP switch no. 3 is used to set whether the relays should switch independently for each level or in parallel if the voltage level is exceeded or not reached. DIP switch no. 4 is used for hysteresis setting, which takes effect when resetting from fault state to normal state. The relay is protected against reverse polarity of the DC voltage or wrong AC/DC input voltage. This is indicated by simultaneous blinking of both LEDs (LED <U and LED >U).
Electrical Data
| Operating voltage | AC 110 V, AC 230 V, AC 400 V or AC/DC 24 V (AC 50-60Hz) |
| Power consumption | max. 4.5 VA |
| Switching output | 250 V AC1 / 24 V DC |
| Mechanical life | 3 x 10^7 |
| Connection | screw terminals 2.5mm² |
| Max. ambient temperature | -20°C to +55°C |
| Storage temperature | -30°C to +70°C |
| Protection class | IP40 |
| Voltage limitation class | III |
| Pollution degree | 2 |
