ScopeSuitable for the measurement of rated frequency 50 Hz or 60 Hz single-phase ac active electricity, used for fixed installation indoors, apply to the environment temperature is -25 ~ 55 , relative humidity is 95%, and in the air does not contain corrosive gases and avoid dust, mold, salt fog, etc. LCD shows6+2 digits LCD display shows the total power consumption. AccuratelyThe meter is fully in conformity with the relevant technical requirements of the IEC62053 international standard of grade 1 or level 2 single-phase energy meter, which can directly and accurately measure active energy of the energy consumption. anti-interferenceIt has good anti-electromagnetic interference, low power consumption, high precision, high overload, high stability, anti electricity-stolen and long life. advanced]It features high reliability, small volume, light weight, beautiful appearance, advanced technology, and 35mmDIN standard guide rail installation, etc. Materiel: Metal + ABS Reference Voltage: 3 X 230/400(V) Reference Current: 3 X 20(80A) Accuracy Level: 1.0 Rated Frequency: 50Hz Constant Pulse: 400imp / kWh Display: LCD 6 + 2 Power Consumption: 2W, 10VA Starting Current: 0.004Ib Operating Temperature: -20 ~ 55 Storage Temperature: 25 ~ 70 Operating Voltage: 0.9-1.1 Rated Voltage Utmost Voltage: 0.8-1.15 Rated Voltage Average Humidity Value of Year: 75% Type: Three Phase Four Wire Electronic Type Size: Approx. 10.1 X 7.6 X 6.5cm / 3.97 X 2.99 X 2.55in Weight: 415g Package List:1 X Three Phase Four Wire Electric Meter