... . CE, ISO. 300KVA Automatic voltage regulator:1. 300KVA Automatic voltage regulator,2. Automatic voltage regulator,3. Output voltage: 380v+-1%,4. CE, ... 495V,2.Input frequency: 30~70Hz ,3.Output voltage: 220V±0.5%,4.Output frequency:50Hz±0.01% ,5.Wave distortion ... : <1%,6.Isolation transformer output, safe and credible,7.Auto-protection and alarm for output overvoltage, over current, overheat, ...