1、It has LCD screen to easy setting and make your operation simple and convenient. 2、Support variable ratio programmable meter, optional communication function,support for Modbus-RTU communication protocol. 3、This is a AC ammeter with high reliability, high safety and automatic measurement. 4、This series of digital display AC measuring instruments is suitable for measuring voltage or current parameters of power distribution system. 5、This digital display ac ammeter is suitable for measuring three-phase ac current parameters of power distribution system. Condition: 100% Brand New Item Type: Ammeter Material: ABS Size: Approx. 7.2 x 7.2 x 5.2cm / 2.8 x 2.8 x 2in Weight: Approx. 192g / 6.8oz Working Power Supply(Auxiliary Power Supply) AC/DC(80-270)V Power Consumption ≤5VA Withstand Voltage ≥2KV Voltage Input Range 3X230/400V Resolution 0.1V Impedance ≥1.7MΩ/phase Power Consumption ≤0.1VA/phase Overload continuouns: 1.2Un, Instantaneous: 2Un/1min Frequency 45-65HZ Current Input Range 3X5A/1A Resolution 1mA Impedance ≤20mΩ Power Consumption ≤0.2VA/phase Overload Continuous: 1.2ln, Instantaneous: 10ln/5s Power Pulse Output Pulse Width 80ms士20% Maximum Port Voltage 35V Maximum Port Current 10mA Impulse Frequency ≤10HZ Output Object Positive active energy, positive reactive energy Communication Interface Physical Interface RS-485 Traffic Rate Highest 9600bPS Communication Protocol Modbus-RTU Isolation Voltage 2000VAC（1min) Environmental Specification Working Temperature -10℃-55℃ Storage Temperature -25℃-70℃ Relative Humidity ≤95%RH Working Altitude ≤2500m Anti-fouling Level Non-corrosive Gas Protection Grade Display surface casing lp54, Meter Shell lP20 Insulation Signal, power supply, output terminal resistance to the shell>100MΩ Withstand Voltage Power, input, output≥2KV Display LCD 1 x Ammeter 1 x Instruction