singel phase transformer: 1.input AC voltage:0-660v 2.output AC voltage: ... -660v 3.low heating, low noise 4.easy to install control transformer has following features:1.enviroment tempreture: -50C - 400C, average tempreture ... : 50VA - 100KVA4. input voltage:220v, 380v, 400v, etc.,5. output voltage: 220V, 380V,24V,36V, etc.6. insulation level: B7. single phase control transformer