???? Economic 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. For your business to provide multi-faceted services. PIR-250 magnetic starter intelligent integrated protection device for magnetic starter mine, covering 380V, 660V, 1140V voltage rating, 5 ~ 250A rated current, all-digital tuning and calibration. With undervoltage | overvoltage | overload | short circuit | Unbalanced | leakage lockout protection; with fault memory and inquiries; with test functions via the menu. Mainly used to replace JDB-80/120/225 and similar analog protection. Functional, well-targeted, long-term stable and reliable operation. EMC tested and certified by the explosion center. ? Measurement of technical parameters 1, Rated current: 5 ~ 250A 2, Rated voltage: 36VAC 3, Rated frequency: 50Hz 4, measuring content: U, I, R 5, Accuracy: ± 3% 6, the switch input methods: optical an isolated environment, altitude not exceeding 2000m, pressure is 80kPa ~ 110kPa 2, the ambient temperature is -5 ℃ ~ + 55 ℃ 3, ambient air relative humidity less than 95% (+ 25 ℃ when) 4, no significant damage 5 gas insulated environment, local standards can be configured to prevent dripping PIR-250 (one) ????????????????????????? PIR-250D (points body)? Host a ????????????????????????????????? host a ???????? ??????????????????????????????????????? display a ???????? ??????????????????????????????????????? data line 1