... 4. CE, ISO. 300KVA Automatic voltage regulator:1. 300KVA Automatic voltage regulator,2. Automatic voltage regulator,3. Output voltage ... for output overvoltage, over current, overheat, short circuit,8.Efficiency reach above 90% ,widely applicable load ... electronic circuit to detect over-voltage express .Over voltage, over current, over temperature, over load, short circuit, and automatic ...