annual repair maintenance of substation installed in main campus sfa camp 23rdbn itbp seemadwar dehradun arm of substation nstalled in main campus sfa camp 23rdbn itbp seemadwar dehradun , testing of earth resistance / testing of earth pit including checking resistance etc and repair / replace if required . , dehydration and filtration of transformer oil of 11 kv transformer , ( remove the moisture , sludge , acidity and mainly to improve the bdv and resistivity of transformers oil . after dehydration and filtration of oil the bdv ( breakdown voltage test ) of oil should be 60 kv and above . , top up of transformer oil in transformer 1&2 complete as per direction of engineer-in charge . , servicing / overhauling of 11 kv ocb ( oil circuit breakers ) , gec . make and testing & calibration of relays , earth fault over current etc . including small material complete as per direction of engineer-in charge . , servicing / maintenance of lt acb ( air circuit breakers ) including cleaning of breaker with crc-226 , removal of old grease and re-greasing the same with recommended grease . , check condition of arcing contact and gap between fixed and moving arcing contacts shall be checked . checking presence of all circlips , checking condition of acb wiring and replace if required . etc complete as per direction of engineer-in charge . , providing / replacement of pannel spout complete gec make ocb , complete testing of transformer including minor repair like repairing of t / f leakage of oil including replacement of oil seal , gasket , ht / lt bushing , nut bolts packing of top cover sheet , inspection sheet , conservator tank complete as per direction of engineer-in charge . , providing , replacement of 11 kv c . t 30 / 15 / 5 amp double ratio protection & metering gec make . , supply fitting of power pack dc voltage 24 volts in i / c panel for tripping system . , supply fitting of amp and volt meter in ht pannel 110 volt pt operated . , servicing / overhauling of 11 kv v . c . b ( vacuum circuit breaker ) , kirloskar make and testing & calibration of relays , earth fault over current etc . including small material . , re-insulation of non- moisturized paint v . c . b and o . c . b . , repair and replacement of mc -61 digital relay l&t make , repairing of 11 kv pt including pt fuse and oil fitting spout etc . gec make , servicing / maintenance power factor relays etc . , providing / replacement of capacitor kvr , servicing / maintenance of 11 kv compact transformer rmu and testing lt acb work complete as per direction of engineer-in charge . , providing / replacement of 11kva heat shrinkable joint kit 3x185 sqm