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-500 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. BKD series dedicated to the circular shell feed switch intelligent upgrade and renovation. Certified by EMC testing and proof testing center. Note: For a round shell sub-gate manual feed switch mine measuring technical parameters 1 ,? Rated current:? 20 ~ 630A 2 ,? Rated voltage: 110VAC / 127VAC 3 ,? Rated frequency: 50Hz 4 ,? measuring elements: U, I, R, U0, I0, gas 5 ,? Accuracy: ± 3% 6 ,? switch input methods: optical isolation ,? electricity metering 7 degrees: a precision 6 ‰ environment ,? altitude does not exceed 2000m, pressure of 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 of 5 atmospheres, ? place to prevent dripping standard configuration PIR-500 (one) ??????????????????????? PIR-500F (split) ?????? ???? host a ?????????????????????????????????? host a zero-sequence current transformer ?? ??????????????? is a zero-sequence current transformer a current transformer a ???????????????????? ??? current transformer a ?????????????????????????????????????????? ?????? display a ????????????????????????????????????????? ???????? data line above is a description of this product, if you have any questions please contact us, you can also visit to the company site.