描述

HRN-39/2 is a multifunction voltage monitoring relay designed for AC/DC supply monitoring applications with 1-pole changeover contact configuration. The relay monitors supply voltage in the range of 24–150 V AC/DC (50–60 Hz) and features smooth adjustment of both upper voltage level (Umax: 80–150 V) and lower voltage level (Umin) set as a percentage of Umax, with adjustable time delay (0.5–10 s) to eliminate short-term voltage fluctuations. It measures true RMS voltage and offers multiple selectable functions including OVER, UNDER, and WINDOW modes with optional fault state memory (Latch) that can be reset via control input (R). The relay provides independent output contacts for each voltage level, operates over a temperature range of -20°C to +55°C, and is mounted on DIN rail EN 60715, making it suitable for industrial control systems, power distribution monitoring, and equipment protection applications requiring reliable voltage supervision.