supply of feeder and bus coupler power contactors , feeder and bus coupler power contactors, 3pole, 1000v ac, 50hz, suitable for 5 00 kva, 750vac on load switching under ac-6a category at temperature 70 deg. c ,coil volta ge 110v +25% -30% dc with surge suppressor,with 2no+2nc aux. contacts, as per rdso spec no. rdso/pe/spec/d/tl/0195-2019 (rev.-0). suitable for switch board cabinet of hog compliant lslrd coaches. acceptable make - m/s. abb- af1250-30-11, m/s. l&t - mvo 820, m/s. siemens- 3rt127 66nf36-8ka0 only. material shall supply by oem or its authorized dealer only. [ warranty per iod: 30 months after the date of delivery ] ]