1. Single-phase electric meter, AC 250 - 450V, 100A with built-in current transformer. Technical data of DIN rail-mounted power meter, watt-hour meter, voltmeter and ammeter: - Model: AC 250 - 450V, 100A with built-in current transformer - Product name: Multifunctional rail-mounted digital display meter - Display screen: High-definition LCD color screen, size 54×80×64 (mm) - Display colors: Red, orange, yellow, white, green, blue - Protruding size: 45*16 (mm) - Installation method: Rail-mounted - Measurement accuracy: 1% ± 2 digits - Function verification: AC voltage, current and power measurement, speed: 2 times per second - AC voltage: 40.0 - 300.0V [110V, 220V]; 200.0 - 450.0V [designed for 380V, 450V] - Current: 0.00 - 100.0A_Universal - Active power: 0 - 3000W, 0 - 4500W - Frequency: 45.0Hz - 65.0Hz - Electric energy (electricity quantity): 0 - 99999Kwh - Power factor: 0.00 - 1.0 OPF 2. Type: Excitation voltage measuring instrument 3. Measurement range: 40 - 400V cv 4. Input voltage: 40V - 450V cv 5. Ambient temperature: 0 - 50℃ 6. Weight: 130g Thank you for purchasing products from our high-quality store and have a nice day.