Annual Repair Maintenance Of Electric Substation At 22 Bn Itb Police Tigri Camp For The Year 2019 20 , dehydration of transformer oil to the required dielectric strength up to 50 kv i/c filtration and testing of oil strength at site etc . as reqd . , servicing and overhauling of existing 800/1000amp horizontal draw out type lt acb ( ge/crompton/l&t make ) cleaning of fixed and moving contacts , arcing contacts , arc shoots with crc , checking the mechanical & electrical tripping system , re greasing of moving mechanism comp . as reqd . , supply & filling top up transformer oil with high viscocity including dehydration complete as required , providing and laying xlpe insulated and pvc sheathed ( heavy duty ) armoured electric cables with hard drawn aluminium conductor for 1100 vol , three and half core cable confirming to is 7098 ( part -i ) nominal cross section area 250 sqmm 3 . 5 core make havells/ polycab/ skytone/isi marked , design , manufacture , supply inspection , handling , assembling , affecting proper connections , testing and commissioning of 14 swg crca sheet steel fabricated cubical type main l . t . distribution panel , floor mounting , dust & vermin proof , front operated construction , enclosure class - ip 52 , powder coated after proper treatment with 7 tank process with top/bottom removable gland plates , as required , double compression type cable glands , earth bus , hinged and lockable doors to achieve dust and vermin proof complete with all inter connections small wiring by min . 2 . 5 sq . mm . frls copper wires , ckt labels etc size of panel 2000x1500x400 mm with 2 mm thick ms sheet . the aluminium bus bar shall be of suitable length , 500 volts , 3 phase 50 hz tpn , electrolytic aluminium as per is 8623 . the panel feeders shall be suitable for terminating suitable nos . 3 . 5 / 4 core armoured aluminium cable panel size should not less then min . 3 sqr . meter 2 set of 400 amp , 415 volts , 3 phase 50 hz tpn high conductivity electrolytic aluminium bus bar of suitable length , smc / dmc supports , with colour coading and insulated by heat shrinkable sleeves and clip on shrouds for joints . the current density of bus bar shall be minimum 1 . 00 sq mm / amp . 1 . all mccbs shall be ics = 100% icu , with rotary handle & pad locking arrangement , with adjustable o/l & s/c trip setting as per load requirement . all tp mccb shall be with heavy duty solid isolable neutral link . 2 . the breaking capacity specified for all mccbs breakers is ics value ( service rating ) . 3 . each section of panel shall have door opearted light of sufficent lux to illumunate that section & each section of capacitor , buscoupler , transformer and dg incomers shall have exhaust fans for ventilation purpose . 4 . the fault withstanding capacity of panel & its control gear shall be min . 25 ka rms for 1 sec . 5 . the maximum height of the panel should not exceed 2100 mm unless specifically approved . 6 . mccb make and model :- abb - t-max , l&t - d sine , schneider - easypact cvs / compact , siemens - 3vl / 3vt , legrand-dpx ga drawings shall be got approved from owners / architects / consultants before fabrication . the panel has to be specifically fabricated as per the space available at basement level . the existing column positions will also be considered incomer & outgoing . 1 . 5 nos . 250 amp tp mccb 36k with extended spreader & rotary handle 2 . 5 nos . 320 a onload changeover switch metering & accessories for each incomer , providing and fixing high insulation pvc mat in substation 3 mm thick of best quality , providing & installation of old & burnt out change over switch 250 amp 4 pole with all enclouser make havells/abb/legrand/l&t , provinding & installation of 250 a mp tp mccb 36k with extended spreader & rotary handle make havells/abb/legrand/l&t , providing & fixing digital voltmeter in amf pannels of best quality , providing & fixing digital amperemeter with ct koil in amf pannels of best quality , providing & fixing selector switch in amf pannels of best quality , providing & fixing indicator in amf pannels of best quality
