... voltage vector PWM modulation technology, has over-modulation function, high voltage-utilization, low output harmonic, and it greatly improves ... :20~90% RH( Non-condensing)3.Indoor places free from direct exposure to sunlight, dust, corrosive gas, flammable gas, ... .Vibration: <0.5G Scope of application: ZVF9V-G series frequency inverter applied at the metallurgy, plastomer,textile, food-stuff,petroleum, ...