Feature: 1. Multifunctional energy meter, which can display total power, power factor, frequency, etc. 2. Single-phase 4P electronic energy meter, with a variety of optional functions, the meter can have a power line, switch output. 3. The energy meter uses a large-screen LCD display, which can accurately measure active energy. 4. The meter has RS485 modified meter reading function, with RS485 communication protocol. 5. Good reliability, small size, light weight, beautiful appearance and advanced technology. Specification: Item Type: Energy Meter Model: DDS6619-015 (liquid crystal display) Reference Voltage (Un): 220V Operating Voltage: 181/279 V AC (3 ~) Rated Current (Ib): 2.5A 5A 10A 15A 20A 5A 30A Maximum Current (Imax): 10A 20A 40A 60A 80A 100A 100A Starting Current: Not more than 0.004b Tolerance Overload Current: 30Imax 0.01 seconds Working Frequency: 50Hz ± 10% Internal Power Consumption: No more than 2W / 10VA Pulse Constant: 800imp / 1000imp RS485 Port: 3 (A) and 4 (B) or 9 (A) and 10 (B) Data Storage Time: > 20 years Operating Humidity: Not more than 75% Working Temperature: -10 ℃ ~ + 50 ℃ Storage Temperature: Not more than 95% Storage Humidity: -30 ℃ ~ + 70 ℃ International Standard: IEC 62053-21 Accuracy: Level 1 Dust And Water Resistance: IP 51 Protective Insulation Closed Instrument Type: II . Package List: 1 x Energy Meter 1 x English Manual Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.