Current Input - 1A or 5 A Supply Voltage - 144VAC-288VAC Measurement Voltage : 144...288VAC (L-N) Operating temperature : 0 to 55 º C Compact 96 x 96 x 75 mm Adapter plate for 144 x 144 cut out can be provided Intelligent control Single CT sensing for balance loads. Large measurement and input voltage User friendly operation Power factor display up to 3 decimal.