Quality first, customers first. Ji 宁浩博 mining equipment specializing in the production and sales of mining equipment protection switching products, adequate supply, complete model, low price, timely delivery, quality Three Guarantees, welcome to contact to discuss the industry, integrity is priceless, win-win cooperation . ? 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 This product introduced here, if you have any questions or want to purchase our products, please contact me Tel: 15589715136 Tel: 0537-2782188 QQ: 877995102 Company Website: http: // www.wgangdai.com welcome you to inquire, we look forward to business cooperation with you to create a more beautiful tomorrow.