S300 has two series: A for asynchronous motor and E for synchronous motor. For example S300A-2-4T 5.5k suits for 5.5kw asynchronous motor and S300E-2-4T 5.5K suits for 5.5k synchronous motor. Variable frequency dives system are widely used in paper making, food and beverage, packing, construction material, textile, machine tools, water supply and ventilation, rubber and plastic extrusion, etc.
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