This frequency convertor is applicable to general industrial purpose three-phase AC asynchronic electric motor. The technical indications are as follows: Input: Rated voltage, frequency: Single/Three phase 220C AC, three phase 380V AC, 50Hz/60Hz; Allowable voltage range: Effective value of voltage: 180~230V for grade 220V, 320~460V for grade 380V. Output: Rated voltage: Three phase: 0~input voltage VAC; Frequency: 0~400Hz Overload capability: Model G permanent if overload< 110%; 1min if 110%180%. Modulation system: Magnetic flux vector pulse-width modulation (PWM) Regulating range: 1:100 Frequency accuracy: Digital setting: Max. Frequency*(+-)0.01% Analogue setting: Max. Frequency*(+-)0.2%