... digital output, we can realize alarming or controlling other equipment (contactor) remotely.2.Technical feature - Measurement: VL1,VL2,VL3 or VL12 ... - PT ratio: Programmable- Voltage: AC 3x120/220V, 3x230/400V, 3x400V overload: 480V (continuous); 800V during 30s; Consumption: < 0.2VA- Frequency: 45Hz ...