LNFA73 Intelligent LCD Display Digital Three Phase Current Meter AC Ammeter(LNFA73 ) Condition: 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