Ji Ning Haobo Quality is an eternal theme. The market is the sea, the quality of the ship, the brand is a fan. Today, the quality of tomorrow's market. Build quality Great Wall, Hing Chinese economy. For your business to provide multi-faceted services. ??????? PIR-700 feed Intelligent integrated protection devices for mine intelligent feeder switch covers 380V, 660V, 1140V voltage, 20 ~ 630A rated current, all-digital tuning. With undervoltage | overvoltage | overload | short circuit | Unbalanced | break with | Wind Power | Gas | metering analog electrical degrees | leakage lockout | leakage protection | selective leakage and other protection; with four RS485 remote communication functions; with fault memory and search functions; experiment with menu function. An economic product. Test by EMC test and proof testing center. Note: For side shell electric sub-closing rated current mine 1 ,? Feed Switch measuring technical parameters: 20 ~ 630A 2 ,? Rated voltage: 10VAC 3 ,? Rated frequency: 50Hz 4 ,? measurement content: U, I , R, U0, I0 5 ,? Accuracy: ± 3% 6 ,? the switch input methods: optical isolation measure 7 ,? electricity: Accuracy 6 ‰ Ambient 1 ,? altitude does not exceed 2000m, pressure is 80kPa ~ 110kPa 2 ,? ambient temperature of -5 ℃ ~ + 55 ℃ 3 ,? ambient air relative humidity less than 95% (+ 25 ℃ when) 4 ,? no obvious damage to the insulation of the gas atmosphere to prevent dripping 5 ,? where? Standard Host a summation current transformer a current transformer 3 Power 1