Tender For supply of battery charging unit cum pre-cooling transformer, with enclosure ofstainles s steel, input voltage -230v ac, 1 phase, 50 hz, output -40 amps, 130v dc, suitablefor charging of self generating type ac coaches , (unit shall be portable with frame and trolley wheels) make: bhasin packard, ramya electrogear or similar [ warranty period: 30 months after the date of delivery ]