Monitoring relay Ex9JP V-1 3P

The Ex9JP V-1 3P is voltage monitoring relay compatible with 3-phase 3-wire and 3-phase 4-wire systems. It effectively monitors voltage for 3-wire 155-500 V AC or 4-wire 90-228 V AC. The device offers adjustable parameters: upper and lower voltage levels; assymetry; voltage and frequency hysteresis levels; delay after supply connection. Operating within a 155–500 V AC supply voltage range, the relay features two changeover contacts, each rated at 5 A/AC1, ensuring reliable performance under varying electrical loads. Adjustments are facilitated via front-panel LCD display with controlling buttons.