The eXpertPRO PM335 compact intelligent electronic device (IED) is a Panel Mounted Power Metering design 96x96mm with exceptional Power Quality monitoring capabilities. The eXpertPRO PM335 combines multifunction Power Metering, Power Quality and Control input/output functions that provide an advanced solution for substation, industrial automation and commercial energy management applications. Incorporating a unique collection of features commonly found in numerous specialised measurements and recording equipment utilised in substation and industrial environments. Although the device is primarily designed as an inexpensive add-on to expand the capabilities of the existing substation protection equipment, it is well suited for a wide range of industrial and commercial applications with high input currents whenever extensive power quality monitoring is required.