Quality is an 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-400Z auto-buck starter protector for mine auto-voltage magnetic starter, covering 380V, 660V, 1140V voltage level, 10 ~ 300A rated current, all-digital tuning and calibration. With undervoltage | overvoltage | overload | short circuit | Equilibrium | leakage blocking | wind power 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. Measurement parameters 1 ,? rated working voltage: 10V 2 ,? rated operating current: 10 ~ 300A 3 ,? rated operating frequency: 50Hz 4 ,? content measurement: I, U, R, measurement accuracy ± 5% 5 ,? leakage detection circuit: leakage latch circuit - Voltage DC12V, Current <1mA 6 ,? switch input methods: an optical isolation environment ,? atmospheric pressure 80kpa-106kpa 2 ,? maximum ambient air temperature does not exceed + 40 ℃, the minimum is not low at -5 ℃ 3 ,? ambient air relative humidity less than 93 ± 3% (ambient temperature of + 25 ℃) 4 ,? enough to corrode metal and damage the insulation of gas environment 5 ,? no dripping and water invasion place? Standard Host a power supply 1