The DKM-401 is a low cost precision instrument designed to display various AC parameters in a 3-phase distribution panel. The standard unit is designed for 230/400V network. A different version is available for 120/208V systems. The unit fits into a standard 92x92mm panel opening. The unit features a 32-bir ARM based microprocessor. Thanks to its sampling rate of 4096s/s it reaches 0.5% precision range. Due to its economical price, it finds a place in every AC distribution panel. MEASURED PARAMETERS Phase to phase voltages: U12-U23-U31 Phase to neutral voltages: V1-V2-V3 Phase currents: I1-I2-I3 Frequency: F FEATURES: • True RMS measurements • Class 0,5 • Flush mount • Front panel programming • Reduced panel depth • Wide operating temperature range • Sealed front panel (IP54) • Plug-in connection system • Low cost TECHNICAL SPECIFICATIONS: Power Supply Input: 170 - 275VAC, 45 – 66 Hz Different AC supply voltages available. Measurement Input Range: Voltage inputs: 10 - 300 V AC (L-N) 20 - 520 V AC (L-L) Current inputs: 0.2 – 5.5 A AC Frequency: 30 - 100 Hz Accuracy: Voltage: 0.5%+1digit Current: 0.5%+1 digit Frequency: 0.5%+1 digit Measurement Range: CT range: 5/5A to 5000/5A Power Consumption: < 4 W Voltage burden: < 0.1VA per phase Current burden: < 1VA per phase Operating Temperature: -20°C to +80°C (-4 to +176 ?F). Maximum humidity: 95% non-condensing. Degree of Protection: IP 54 (Front Panel) , IP 30 (Back panel) Enclosure: Non-flammable, ROHS compliant, ABS/PC (UL94-V0) Installation: Flush mounting with rear retaining brackets Dimensions: 102x102x53mm (WxHxD) Panel Cutout: 92x92mm Weight: 200 gr WE DO NOT SHIP THIS PRODUCT TO USA AND CANADA