supply of feeders-1&2 and bus coupler,feeders-1&2 and bus coupler,,feeders-1&2 and bus coupler,power contactors, 3pole, 1000v ac, 50hz, suitable for 500kva, 750v ac onload switching under ac-6a category at temperature of 70 degree c & coil voltage of 110v +25%-30% dc with surge suppressor, 2no+2nc, as per rdso spec no. rds o/pe/spec/d/tl/0195-2019 (rev.-0) suitable for switch board cabinet for hog compliant lslrd c oaches. make & model (abb model no.-af1250-30-11, l&t model no.- mvo 820 & siemens model no- 3t f69338 df4z a02+3tx7 5723h) as per common bill of material of sbc for lslrd of rdso letter no. el/7.1. 108/mssbc dt.18.10.2019. [ warranty period: 30 months after the date of delivery ] ]