supply of supply, testing, installation and commissioning of transformer differential protection relay,suitable for existing 132 kv/25 kv traction sub-station (tss) transformer protection panels, , supply, testing, installation and commissioning of transformer differential protection relay, suitable for existing 132 kv/25 kv traction sub-station (tss)transformer protection panels, complete with mounting hardware, terminals, wiring accessories and all necessary fittings, ready for operation in all respe cts, suitable for ashida make panel and fully compatible with the existing transformer protection scheme, s cada system and associated ct arrangements. the offered relay shall comply with rdso specification no. ti/spc/psi/protct/6072 or latest applicable specification, including all applicable amendments/corrigenda. the scope shall include site testing,relay settings, configuration, integration with the existing protection an d scada system, functional testing and commissioning, including all necessary accessories, wiring,softwar e/configuration and other incidental works, complete in all respects. necessary software and communicatio n accessories shall also be provided for downloading relay data for fault analysis. [ warranty period: 30 months after the date of delivery ] ]