F23011320102 is a single-phase voltage monitor designed by Tecsis. It is intended for use as a safety measure in industrial and commercial switchgear, and is designed to monitor the voltage of a three-phase system. It can be used in AC systems with voltages up to 690V and a frequency range of 45-65 Hz. When the monitored voltage reaches its preset limit value, the monitor trips and signals the system to shut down, thus preventing further damage. The monitor is equipped with various functions, such as hysteresis, reset delay and memory for error history, that ensure reliable and safe operation of the monitored circuit. It is compliant with international safety standards, including UL, IEC and CE, and can be customized to meet customer requirements.