Franciscan Ninghao Bo quality is the eternal theme. Market is the sea, the quality of the ship, the brand is a fan. The quality of today's and tomorrow's market. Build quality of the Great Wall, China Xing economy. You PIR-300FJ dual power single fan switch intelligent integrated protection devices for intelligent integrated protection devices mine dual power single dedicated fan switch covers 380V, 660V, 1140V voltage level, 3 ~ 200A rated current, all-digital tuning and calibration. With undervoltage | overvoltage | overload | short circuit | Equilibrium | leakage lockout protection; with four remote RS485 communication function; with calendar clock; with fault memory and inquiries; with test functions via the menu. Achieve a variety of operating modes. Functional, well-targeted, long-term stable and reliable operation. By EMC testing and proof testing center. Note: You can use the PIR-300FJ supporting the measurement circuit composed of three technical parameters 1, Rated current: 3 ~ 200A; 2, rated voltage:? 18VAC 3, Rated frequency: 50Hz 4, measuring content: U, I, R 5, measuring Accuracy: ± 5% 6, the switch input methods: optical isolation environment an altitude of no more than 2000m, the air pressure is 80kPa ~ 110kPa 2, the ambient temperature is -5 ℃ ~ + 55 ℃ 3, ambient air relative humidity less than 95 % (+ 25 ℃ when) 4, no obvious damage to the insulation of 5 atmospheres, to prevent dripping local standard configuration host a display a data line a set of connectors, the company offers a multi-faceted services.