Description

Features:
　　1, multi-level modules in series voltage-frequency control system, directly 6kV, lOkV input and output, no output transformer; can directly drive an ordinary three-phase asynchronous motor, motor insulation without any special requirements;
　　2, high power factor, reaching more than 0.*6, no power factor compensation device;
　　3, the conversion efficiency of the system devices (including the input isolation transformer) to more than *6%, transformer efficiency of *8% or more;
　　4, the current harmonics is small, without harmonic suppression device;
　　5, rectifier with phase-shifting transformer dry-type transformers, insulation class H;
　　6, the modular design of the power unit can be easily extracted from the rack, mobile, and maintenance, all units can be interchangeable with the models;
　　7 to soft start the motor, no impact on current, reduce mechanical wear, extending motor life;
　　8, support the DCS control;
　　9, the dip frequency devices for remote operation, and its DCS / control box / local control switch;
　　*0, supports MODBUS, PROFIBUS, etc. communication protocols, enabling communication with the host computer.
　　*1, the main circuit and the controller uses high-pressure fiber-optic communications, interference is strong, safe and reliable;
　　*2, complete fault detection, precise and accurate positioning of fault protection and alarm display;
　　*3, instantaneous power failure restart
　　**0ms power-down within the grid, can maintain normal operation. Calls within 3s after power grid can automatically track the speed and then start. Power-down time is greater than 3s, the automatic tripping protection. The maximum loss of power conversion equipment to allow time for *0 seconds, then start-up time is short, fast, the impact of current small.
　　*4, two-way frequency-conversion online auto switch
　　Allow the user to stop machine in case of no disturbance between the frequency and frequency to switch between online and ensure uninterrupted equipment operation.
　　*5, the grid has a strong ability to adapt
　　In **5% N ~ **5% voltage fluctuation to ensure full output, and can withstand *0% of the amount of voltage drop from the sky continues to run.