supply of set of items ( one set consists of following items for track feed battery charger 10 ampere ) 1. ) transformer for track feed battery charger 10 amp. to irs s.89 / 2013 ver. 1.0 along with holding bracket and fixing accessories.transformer as per rdso specification irs-s-89 / 2013 ver.1.0 transformer used shall be impragnated and shall be of natural air cooled type and shall be confirm is:6297 class-f for higher grade insulating material as per is:1271 and polyster enameled copper winding wire confirming to is: 13730 ( pt-3 ) shall be used for winding transformers. input voltage - 0-90-100-110 v ac output voltage - ( 0-3.8-5.54-6.92-8.31 ) + / -0.2 v at the load of 5.0 amp dc load sensure voltage - 15.21 vac.auxiliary winding voltage -15.24 ( + / - 2 ) v , voltage regulation less than 5% . voltage current less than 10% of the full load current along with holding bracket and fixing accessories . fourth tapping 10 amp. dc load- 8.12 volt efficiency not less than 95%.note:-transformer sub assembly should be assembled in proper way 2. ) filter choke for tfbc 10 amp > 360+ / - 2 ( plus or minus ) micro henry 100 hz as per rdso specification irs - s-89 / 2013, version 1.0 with m.s. threaded terminations. ( a ) the size should be ( 27mm x 64mm x 78mm ) + / - 1 mm inclusive of insulation. ( b ) ripple contents less 5% while using with pie filter having 2 nos. of condensor 47000 micro farad with input voltage setting of 2v, 4v, 6v and 8v. ( c ) suitable higs to be provided in the choke for fixing. ( d ) winding should be vacuum impregenate and shall be of natural air cooled type and shall be confirmed to is 6297 class-f or higher grade insulating material as per is 1271 and polyster enameled copper winding wire confirming to is 13730 ( part 3 ) . [ warranty period: 30 months after the date of delivery ]