... ,frequency,phase sequence,power 2.RS232 ETCR 4000A Double Clamp /Three Phase Digital Phase Meter Features: Simultaneously measure ... , inductive and capacitive circuits, test second circuit and bus differential protection systems, read the phase relationship between CTs ... SizeLength, Width, Height:196mm×92mm×54mmClamp Sizeacuminate current clamp:7.5mm×13mmMeasurement Range(automatic shift)AC Voltage:0. ...