Repair/Maintenance Of Ht Vcb Panel Including Calibration Of Relays And Repair/Maint Of Street Light Security Lights High Mast Lt Panels Ug Cables Etc Incl Certain Misc Work At Inhs Kalyani Under Age E/M No I Of Ge U I Visakhapatnam , disconnecting defective oudoor/indoor power distribution transformer of 315/400/500/1000 kva rating from ht/lt and earth conection and taken out from the sub stn / plinth and transporting to workshop taking out complete transformer oil , storing the same in suitable containers ( to be provided by contractor ) opening top cover and lifting up the core assembly carefully to check the condition of transformer winding core refixing the same after repair refilling the transformer oil after dehydration and filteration ( dehydration and filteration to be paid separately ) including checking of leakage of transformer body and welding works required for making transformer body leak proof , applying two coats of synthetic enamel paint over the transformer body after preparation of surfaces , tranportation of transformer from work shop to site and reinstalling the same at any site and connecting and testing complete all as directed by engr-in-charge . the materials required for rectification of defects such as rewinding / core / transformer oil bushes etc shall be measured and paid searately . , supply only the following items for item no 01 here-in-before , ( a ) ht copper coil made out of proper size of dpc copper wire super enamelled of high quality matching with the existing impedance and insulation of all as specified and as directed by engr -in-charge . , ( b ) reconditioning of lt copper coil after providing necessary insulating material , glass sleeves etc all as directed at site by engr-in-charge . , ( c ) ht bush rod made out of copper with brass nuts and washers of required quality and size suitable for 315 kva to 1000 kva transformer , ( d ) ht bushing porcelain suitable for for 315 kva to 1000 kva transformer complete with gaskets . , ( e ) lt bush rod suitable for 315 kva to 500 kva transformer with washer complete , ( f ) lt bushing porcelian suitable for for 315 kva to 500 kva transformer complete with gaskets . , ( g ) synthethetic rubberised cork sheet gasket 1/4 thick suitable for main body of transforemr capacity upto 500 kva . , ( h ) silicagel dark blue laboratory grade of good quality , filteration of transformer oil of transfomers installed at various locations to achieve di-eletric strength not less than 50 kv at 2 . 5mm gap as per relevant is with portable filteration plant , testing of the oil for the di-electric strength before filtratin and after filtration complete all as directed by the engr-in-charge . , supply and topping up of transformer oil with di-electric strenght not less than 50 kv in to the conservator tank/ body tank of the transformer at various locations complete all as directed by the engr-in-charge . make: power oil/ transoil/ sabitha chemicals/electrol , m&l for preparation of old painted surfaces of transformers with coarse cloth/ brush and painting throughout externally on exposed surfaces with two coats of smoke grey colour synthetic enamel paint including writing of transformer details on plinth in white enamel paint on black enamel paint back ground complete including one coat of white wash for base foundation all as specified anddirected by engineer-in-charge for the following capacity in-door/ out-door type transformer:- , ( a ) 200kva/315 kva/400 kva , ( b ) 500 kva , ( c ) 1000 kva , s & f in replacement of mild steel plates ( plain or chequered ) , channels , angle irons , square cut or notched ( ordinary and countersunk ) forming holes , without any attachment conforming to fe 410-w inlcuding applying two coats of synthetic enameled paint over a coat of red oxide zinc chrome primer including dismatling old rusted one in any description all as directed . , supply & replace 11kv potential transformer type vir= 11000/rt3/110/rt3/110/rt3v , va=100/50 vf; 1 . 2cont&1 . 9 for 8 hours , voltage transformer single phase type hsv/il , 12/28/75 kv all as specified , supply & replace cable jointing kit for 11kv grade cable for indoor termination heat shrink type jointing complete with jointing material and accessories suitable for 3 core xlpe armoured aluminium conductor cablie of size 185 sqmm , complete including testing after jointing all as specified . make; birla 3m / denson / raychem , supply & replace cable jointing kit for 11kv grade cable for outdoor termination heat shrink type jointing complete with jointing material and accessories suitable for 3 core xlpe armoured aluminium conductor cablie of size 185 sqmm , complete including testing after jointing all as specified . make; birla 3m / denson / raychem , supply & replace cable jointing kit for 11kv grade cable for straight through joint heat shrink type jointing complete with jointing material and accessories suitable for 3 core xlpe armoured aluminium conductor cablie of size 185 sqmm , complete including testing after jointing all as specified . make; birla 3m / denson / raychem , m&l for strip opening the ht panel of rating 11 kv , 3 phase comprising of following repairs , inspecting , overhauling and servicing/ of vcb complete all as directed . make: cg . a ) opening the complete instrument chamber/ hv cable box/lv cable box . decarbonising/ cleaning the complete ht 11 kv 3 phase independent bus bar , bus bar chamber of ht panel and inspecting the bus bar insulators . b ) checking , inspecting , calibration of idmt relays , ammeters and voltmeters etc complete . c ) checking complete electrical tripping circuit of ht panel including control wiring from secondary system rotary to tripping coil , auxiliary switch male and female housing cut out , etc . and wiring including replacement of damaged wire at places including operation on dc system , testing and commissioning complete all as directed . , supply and replace on load change over switch 4 pole 630 amps with front operated handle in sheet metal enclosure complete with necessary connections all as required at site . make: standard/hpl/havells , repair/servicng of lt air circuit breaker of 630/800 amps capacity of l&t make complete including strip opening and checking and cleaning of contacts , arc chutes , tightening of all connections , setting and calibration of tripping relay , greasing of all mechanical parts and replacing minor parts like thimbles , control cables , nuts , bolts etc through the authorised service engineer and testing complete all as directed . , supply & fixing of volt meter of size 96mmx96mm range , 0 - 500 v digital type with inbuilt selector switch . make:-ae / imp / meco / mei/ hpl/ conzerv/ l&t , supply & fixing of ammeter , of size 96 x96 mm digital type , with suitable cts and inbuilt selector switch . make:- ae / imp / meco / mei/ hpl/ conzerv/ l&t , supply & fixing of indication lamp led type , ( r , y , b ) . make:- kaycee / technik / l & t , supply and fix lighting arrester ht 11 kv 10 ka station class all as per specified and directed by engr in charge make : jaipuria , supply and laying ht ug xlpe insulated , pvc sheated , bedded , galvanised steel strip or wire armoured heavy duty electric power cable of size 3 core 185 sqmm , 11 kv grade ( earthed ) stranded aluminium conductor laid in trenches / passing through pipe/duct/wall complete including taking out old u/s cable all as specified and directed by the engineer -in- charge . make : finolex / polycab / havells / gloster / kei industries ltd / asian cables , supply& replace heat shrink type cable jointing kit for straight through joint for lt cable complete with jointing material and accessories suitable for 4 core 6 to 16 sqmm xlpe armoured aluminum cable , jointing and testing after completion all as specified . make; birla 3m / den
