BANGLADESH POWER DEVELOPMENT BOARD TENDER ... - BPDB

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9.4 CABLE ERECTIONConcrete lined cable trenches shall be provided within the power station. All suchtrenches shall be provided with covers to form a flush finish with the finished floorlevel. Cables shall be secured by non-corrodible cleats supporting steelwork, or ontrays. Wooden cleats shall not be used. Cables shall not be clipped or cleateddirectly to masonry. All cable supporting steelwork racks cleats trays and fixings intrenches or elsewhere shall be supplied under this contract.Where the cables are to be installed on racks, these racks shall be of galvanisedsteel angles or aluminium and designed such that the spacing and type ofsupporting cleat ensure that no undue pressure is exerted on the sheath orarmour of any cable.Cables tray shall be of the first grade perforated galvanised steel with folded sidemembers and supported on steel work or masonry is required. Segregation of thevarious services shall be achieved by use of separate trays for each voltage gradeof cable used. The design of the cable tray system shall make due allowance forthe future installation of at least 10 percent spare cables and also for theinstallation of cables supplied by others.All cables in vertical runs shall be supported to ensure that no strain due to theweight of the cable is taken by any terminating box. Each cable when erectedshall have permanently attached to it at each end, non-corrodible metal markersshowing the cable identification number, voltage, rating, size and make up.Single core cables shall be laid up in close trefoil 3-phase groups and erected inseparate non-magnetic clamps to the approval of the Board.Where cables are erected on outdoor steelwork supporters, sun shades ofapproved design and materials shall be included and erected as necessary toprotect the cables.9.5 GROUNDINGThe Contractor shall provide all grounding cable, equipment, and materialsrequired for a complete installation including the direct buried ground mat for thepower station,. This shall include, but not be limited to, all facilities for groundingof panel boards, control panels, transformers, switches, lighting poles, lightingstandards, and all electrical equipment enclosures. Two point grounding for eachequipment, panel board and steel structure shall be provided.(1) Grounding wire for ground gridHard drawn copper stranded wire in accordance with latest IEC Hard DrawnCopper wire for electrical purposes.Nominal cross sectional area: 200-sq. mm.Ghorasal 200 MW to 300 MW Gas Turbine Peaking Power Plant Project (Vol-2 of 3)98
(2) Grounding wire of the equipment to be connected with grounding grid.Annealed copper standard wire in accordance with latest IEC Annealed copperstranded wire for electrical purposes.Nominal cross sectional area:100 sq. mm.Ground grid shall be mesh type and be laid so that the completed earthing systemshall have a maximum earth resistance value of less than 0.5 ohms, at any pointon the system. The contact voltage at any point inside the power station at theincidence of an earth fault shall not exceed 50 volts. The power station groundingshall be embedded to a minimum depth of 800 cm. The grounding rods additionto the above grid shall be provided, if required. The minimum outer diameter ofgrounding rod shall not be less than 15 mm.Ghorasal 200 MW to 300 MW Gas Turbine Peaking Power Plant Project (Vol-2 of 3)99
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Volume - 2Technical RequirementsSec
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GHORASAL 200 MW to 300 MW GAS TURBI
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2. Scope Of Work2.0 Scope of work2.
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3. Generator switchgeara. Outdoor e
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Rated frequency: 50 HzRated nominal
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Lighting impulseWithstand voltage(1
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h. One (1) Lot Control and instrume
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2.13 TestsThe Contractor shall be r
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Section 3Power Plant ArrangementGho
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3.0 Power Plant Arrangement3.1 Gene
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3.3.2.4 Compressor Wet Washing Syst
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The distillate fuel oil system shal
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6. Sump tankThe sump tank allows dr
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provide necessary protection for ma
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4. Generator And Ancillary Equipmen
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4.1.4 Temperature RiseThe temperatu
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4.1.12 Accessoriesa. Temperature de
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- Secondary wiring including cable
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4.3.6 Voltage TransformerThe voltag
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3) The rated service voltage shall
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Section 5TransformersGhorasal 200 M
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5. TRANSFORMERS5.1 GENERALThe trans
Page 48 and 49: . The tank shall be of the welded s
Page 50 and 51: The wiring shall be connected at th
Page 52 and 53: 5.3 UNIT AUXILIARY TRANSFORMER5.3.1
Page 54 and 55: h. Anchor devicei. Oil preservation
Page 56 and 57: 6. 230 kV OUTDOOR SWITCHGEAR, EQUIP
Page 58 and 59: -Power frequency withstand voltage(
Page 60 and 61: eaker.(6) Dielectric Test Voltagea.
Page 62 and 63: . Rated insulation level- Lighting
Page 64 and 65: f. Unless otherwise specified, the
Page 66 and 67: 6.3.2 DESIGN CRITERIAThe steel stru
Page 68 and 69: 6.4 INSULATORS AND WIRING MATERIALS
Page 70 and 71: Section 76.6 Kv SwitchgearAndLow Te
Page 72 and 73: 7. 6.6 kV SWITCHGEAR AND LOW TENSIO
Page 74 and 75: - Number of circuit :Determined by
Page 76 and 77: Section 8Control And ProtectionGhor
Page 78 and 79: 8. CONTROL AND PROTECTION EQUIPMENT
Page 80 and 81: - Automatic synchronising equipment
Page 82 and 83: ee. AVR failure xff. Emergency Trip
Page 84 and 85: can be seen through the window with
Page 86 and 87: Required no. of 6.6 kV and 415 V vo
Page 88 and 89: 8.10.3 CONTROL EQUIPMENT(1) Transmi
Page 90 and 91: The test block shall be of the back
Page 92 and 93: Section 9Cabling And GroundingGhora
Page 94 and 95: 9. CABLING AND GROUNDING9.1 GENERAL
Page 96 and 97: 9.2.4 CONTROL AND INSTRUMENT CABLES
Page 100 and 101: Section 10DC Power Supply SystemGho
Page 102 and 103: 10 DC POWER SUPPLY SYSTEM10.1 BATTE
Page 104 and 105: float charge as well as boost charg
Page 106 and 107: Section 11Lighting And Small Power
Page 108 and 109: 11. LIGHTING AND SMALL POWER SUPPLY
Page 110 and 111: (ii)Three phase plug socketOutdoor-
Page 112 and 113: Section 12Fuel Handling FacilitiesG
Page 114 and 115: 12. FUEL OIL SYSTEM AND HANDLING FA
Page 116 and 117: from unloading base to the fuel tan
Page 118 and 119: 13. FIRE PROTECTION FACILITIES13.1
Page 120 and 121: System of lock off to (but not exit
Page 122 and 123: Section 14Communication FacilitiesG
Page 124 and 125: 14. COMMUNICATION FACILITIES14.1 GE
Page 126 and 127: (2) General CommunicationWhen the o
Page 128 and 129: (1) BatteryType of batteryCapacityN
Page 130 and 131: 15. MAINTENANCE FACILITIESPage15.1
Page 132 and 133: 15.1.4 RATINGThe rating of the cran
Page 134 and 135: The main power supply shall have a
Page 136 and 137: Static tests of all automatic seque
Page 138 and 139: Section 16Tests And InspectionsGhor
Page 140 and 141: 16 TESTS AND INSPECTIONS16.1 GENERA
Page 142 and 143: subjected to the following tests by
Page 144 and 145: c. Stranded Conductors for Overhead
Page 146 and 147: days from the receipt of the said n
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circuit of unit motor control centr
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Special measures may have to be tak
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Checks shall be made of the local a
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Section 17Civil WorksGhorasal 200 M
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17.9 Sewage Works17.9.1 General17.9
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17.1.4 SITE LABORATORYThe Contracto
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where directed by the Board extra s
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approval regarding the re-measureme
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igidly in position down to the lowe
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on piles together with the apparatu
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than 15 cm in size containing suita
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aggregates shall be washed prior to
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17.6.13 FORMWORK AND TIMBERINGFormw
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he Contractor shall repair at his o
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Sieve designationPercentage by(Squa
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(b) Transverse Joints: The transver
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17.7.2 Gravel SurfacingThe Contract
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extended with sufficient number of
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A written record of the drilling in
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) Control EquipmentThe control equi
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17.12.2 GatesSliding metal gates of
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18 Building WORKS18.1 General18.1.1
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18.1.4 RecordsThe Contractor shall
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FrameRoofExterior wallPartition wal
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18.5 Materials And Workmanship18.5.
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(7) PaintPrior to delivery after sh
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oof cladding shall be less than 1.1
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. Wooden doorsPlywood for panelThic
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The terrazzo is to be trowelled to
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to suit. Stud shall be formed of ap
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Section 19Spare PartsGhorasal 200 M
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19. SPARE PARTS19.1 GENERALThe Cont
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BACKGROUND INFORMATION:Bangladesh P
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- Overhauling of all electrical mot
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3. BASIS OF PRICE3.1 Basis of price
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the delayed services or such other
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13. GENERAL CLAUSES CONCERNING TERM
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17. INSURANCEThe insurance includin
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Appendixes20.1 Site Layout20.2 Grid
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BANGLADESH POWER DEVELOPMENT BOARD TENDER ... - BPDB

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