The CDR-8 unit measures, calculates and displays the current of 8 independent channels. Each channel can be configured as an earth leakage or current relay. It measures the true root mean square, taking decisions about the operations being carried out. It can work as a maximum or minimum current relay or as an earth leakage relay. The CDR-8 can show the earth leakage current and status of the operations relay of each of the 8 channels on an LCD display.