The 1SVR730830R0300 is a voltage monitoring relay from the CM range, designed to reliably monitor single-phase AC or DC mains. It operates with a control supply voltage of 24-240 V AC/DC and features four selectable measuring ranges from 3 V to 600 V. This device can be configured for either overvoltage or undervoltage monitoring, utilizing a true RMS measuring principle for accuracy. It includes an adjustable ON-delay tripping time from 0.1 to 30 seconds and provides a single c/o (SPDT) contact output. Its function is to protect equipment from damage caused by unstable supply voltages in various applications.