ircon elect 5037 5038 ncrtc b and bc cum dcdb ot 32 design, manufacturing and supply of battery, battery charger cum dcdb for the work of delhi ghaziabad , meerut rrts corridor of ncrtc ( lot -1 lot-2 ) , battery: , supply of one set of batteries for each rss ( one set comprising of two nos of battery bank ( one bank 85 cells ) , complete with mounting rack, battery protection & connections ) . each battery bank shall be rated to ensure total autonomy of the substation for 8 hours & the rating shall not be less than 400 ah in any case. , battery charger cum dcdb: , supply of one set of battery charger cum dcdb for each rss ( one set comprising of 3 nos battery chargers, 2 nos battery chargers each acting as a back up to the other and a third battery charger acting as a standby to any of the normal battery chargers. battery charger equipment shall include inlet transformer, silicon diode / thyristor or thyristor bridge, all protection systems, monitoring and measuring devices, control devices, inspection light etc. and shall be suitable for battery bank of 400 ah including dc distribution board as per technical specification & sld. , spares: , supply of spares for lot-1 and lot-2 as per section-xv of scc.