National New Year folks Hello everyone, I 宁浩博 mining company Ji Machinery Co., Ltd. with its strong technology, excellent product quality, satisfactory service, in the market enjoy a high reputation. Intelligent integrated protection with excellent quality, trusted by the user. First-class products, good service is our consistent aim! The company is willing to friends and the community work together for common development! The staff warmly welcome the global community of companies and individuals to negotiate business for a better future! You have any questions about the company and products need advice, you can call the telephone company and we look forward to your sincere cooperation. Let me take you to understand this product:? PIR-700 feeder intelligent integrated protection devices for mine intelligent feeder switch covers 380V, 660V, 1140V voltage level, 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 protection function; with four remote RS485 communication function; with fault memory and query capabilities; experiment with the menu function. An economic product. Testing by EMC test and proof testing center. Note: For side shell electric sub-closing a mine ,? feed switch rated current measurement techniques used parameters: 20 ~ 630A 2 ,? Rated voltage: 10VAC 3 ,? Rated frequency: 50Hz 4 ,? content measurement: U, I , R, U0, I0 5 ,? Accuracy: ± 3% 6 ,? switch input methods: optical isolation ,? power level measurement 7: 6 ‰ precision environment ,? altitude of no more than a 2000m, pressure is 80kPa ~ 110kPa 2 ,? ambient temperature is -5 ℃ ~ + 55 ℃ 3 ,? ambient air relative humidity less than 95% (+ 25 ℃ when) 4 ,? no obvious damage to the insulation in the gaseous environment can prevent dripping 5 ,? place? Standard Host a zero-sequence current transformer a current transformer 3 power one above is the introduction of this product, if you have any questions please contact us, you can also visit to the company site.