supply of supply, installation, testing & commissioning of earth leakagesupply, installation, testing & commissioning of earth leakage,supply, installation, testing & commissioning of earth leakage detector as per rdso/spn/256/2002 with latest amendments. the basic detecto r unit shall comprise of 12 channels, for use on signaling circuits of 110v ac/dc and/or 60v/24v/12v dc as ordered by purchaser. if the detector is required fo r less number of channels, dummy plates shall be provided. for additional requirement addon/expandable cabinet may be used. the voltage specified shall b e provided with +25 and -10% tolerance. note: rdso item id: 3100010 [ warranty period: 30 months after the date of delivery ] ]