... 4. CE, ISO. 300KVA Automatic voltage regulator:1. 300KVA Automatic voltage regulator,2. Automatic voltage regulator,3. Output voltage: ... frequency through power converting circuit.1.Input voltage: 265~495V,2.Input frequency: 30~70Hz ,3.Output ... , over temperature, over load, short circuit, and automatic alarmInsulation reactanceAbove 500Vdc 20MΩPressure endurance insulation1800Vac/5Ma/1minuteCooling ...