1Real Time Monitoring: This relay can achieve real time monitoring of DC overvoltage and undervoltage faults, with adjustable overvoltage value, undervoltage value, and action time. 2Contact and Indicator: This voltage monitoring relay has 2 sets of NO NC contacts, and 3 indicator lights indicate various working condition, without the need for additional auxiliary power supply. 335mm DIN Rail Mount: The phase sequence protection relay adopts a 35mm DIN rail and standard modular structure, making it easy to install and ensuring structural stability. 4Protection Range: The working voltage is 3 phase 380VAC, the undervoltage protection range is 300380VAC, and the overvoltage protection range is 380460VAC. 5Wide Application: The 3 phase voltage relay is commonly used in DC motor, battery, UPS power supply, DC switchgear, DC panel, machine tool, industrial control system, etc.