supply of vvvf drivevvvf drive,vvvf drive (1) input voltage: 690vac+-5%, (2) input current: 721amps, (3) cooling: air cooli ng, (4) suitable to run id fan motor of 650 kw, 690v technically and physically equivalent to model no: ac s880-04-721a-7 of abb make. accepted makes: siemens, yaskawa, danfoss, abb, allen bradley or similar. note: (a) drive should match with the panel available at rwf. (b) drive should be compactible with scada at rwf. (c) supplier may visit rwf for panel dimension compatibility at rwf inspection will done at consign ee premises. [ warranty period: 30 months after the date of delivery ] ] => limited