5 year annual maintenance contract along with switch board operation for 33 KV/433 volt sub-station (2 MVA compact transformer) with DG set (1010 KVA compact DG set) main cum auto synchronization panel & other allied electrical equipment (bus-bar, AB switch, VCB capacitor bank battery, main electric controlled panel along with interconnection, earthing safety equipment and cable etc. at Patna,Bihar,India