Variable ratio range: : current CT(magnification), voltage PT (magnification) Installation method: : panel; Input mode: : three-phase three-wire, three-phase four-wire (optional); Dimensions: : 123x123x96mm; Display mode: integrated digital tube display; Pulse output: : 2 power pulse; Measurement error: : voltage: 0.5 level; Current: 0.5 level; Frequency: 0.5 level; Power: level 1.0; Power: 1.0; Working power supply: AC220V; Measuring parameters: voltage, current, active power, reactive power, power factor, frequency, active electric energy, etc. Open hole size: : 112*112; Input signal: : three-phase AC current, voltage; Output signal: : Communication interface: RS485;