BANGLADESH POWER DEVELOPMENT BOARD TENDER ... - BPDB

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f. Unless otherwise specified, the characteristics and others shall comply withIEC 185 .(5) Dielectric Test Voltagesa. Power frequency withstand voltage : (As per relevant IEC) kV for oneminuteon primary windingsb. Lighting impulse withstand voltageFull wave (1.2/ 50 micro sec.):1050 kV PEAKc. Power frequency withstand voltage :2.0 kV for one minute.on secondary windings(6) AccessoriesThe following accessories shall be provided for each current transformer.a. Nameplatesb. Grounding terminalsc. Lifting lugsd. Steel supporting structure with anchor bolts and nutse. Junction boxesf. Conduit pipesg. Other necessary accessories, if any6.2.5 230 kV LIGHTNING ARRESTERS(1) TypeOutdoor, single phase, self standing, Metal-Oxide type with surge operatingcounter.(2) UseFor protection of 230 kV outdoor switchyard equipment and transformer windings.(3) Electric system to be protectedThree (3) phase, three (3) wire, neutral point solidly grounded system.(4) Ratings and Performancesa. Rated voltage : (As per relevant IEC) kVb. Rated frequency : 50 Hzc. Nominal discharge current : (As per relevant IEC) KAd. Type of duty : Heavy, Long durationDischargee. Pressure relief class : Cf. Lighting impulse insulation level : 1050 KV peak(1.2 / 50 micro sec.)g. Maximum residual voltage : (As per relevant IEC) KVh. Power frequency spark-over voltage : (As per relevant IEC) KV(5) Operating dutyThe arrester shall successfully interrupt the dynamic current repeatedlyconducted by impulse wave.Ghorasal 200 MW to 300 MW Gas Turbine Peaking Power Plant Project (Vol-2 of 3)64
(6) Requirements for Design and Constructiona. The series gaps shall be so designed that for practical purposes thevarious characteristics will not alter under the change of weather conditionsb. The various parts of the lightning arrester shall be of complete moistureproof construction so that the characteristics shall not be impaired under longterm use. Sealed parts shall be so designed to prevent to ingress of moisture orwater under long term use.c. The operation counter shall be equipped on the lightning arrester in eachphase and consist of a sure current recording and measuring device, such as amagnetic link surge crest ammeter, and counter for the number of discharges ofthe lightning arrester. It shall be located at the position convenient for inspection.d. Creepage distance of bushing shall not be less than 25 mm/ kV of phaseto phase voltage. The glazing colour shall be of brown.e. Unless otherwise specified, tile characteristics and others shall comply withIEC 99-1(7) Dielectric Test Voltagea. Power frequency withstand voltage : (As per relevant IEC) kV for oneb. Lighting impulse withstand voltage :1050 kV (peak)(1.2 / 50 micro sec.)(8) AccessoriesThe following accessories shall be provided for each lightning arrester.a. Nameplatesb. grounding conductor to grounding terminalc. Operating counterd. Grounding terminale. Steel supporting structure with anchor bolts and nutsf. Other necessary accessories, if any6.3 STEEL STRUCTURE (Busbar)6.3.1 TYPEThe steel structure shall be lattice truss construction made of galvanised formedsteel and assembled by bolts and nuts.The component members of steel structure shall have inter-changeability withother identical members. The basis framing of the steel structure shall be identicalon all four (4) faces below the bend line.Ghorasal 200 MW to 300 MW Gas Turbine Peaking Power Plant Project (Vol-2 of 3)65
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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
Page 13 and 14: Lighting impulseWithstand voltage(1
Page 15 and 16: h. One (1) Lot Control and instrume
Page 17 and 18: 2.13 TestsThe Contractor shall be r
Page 19 and 20: Section 3Power Plant ArrangementGho
Page 21 and 22: 3.0 Power Plant Arrangement3.1 Gene
Page 23 and 24: 3.3.2.4 Compressor Wet Washing Syst
Page 26 and 27: The distillate fuel oil system shal
Page 28 and 29: 6. Sump tankThe sump tank allows dr
Page 30 and 31: provide necessary protection for ma
Page 32 and 33: 4. Generator And Ancillary Equipmen
Page 34 and 35: 4.1.4 Temperature RiseThe temperatu
Page 36 and 37: 4.1.12 Accessoriesa. Temperature de
Page 38 and 39: - Secondary wiring including cable
Page 40 and 41: 4.3.6 Voltage TransformerThe voltag
Page 42 and 43: 3) The rated service voltage shall
Page 44 and 45: Section 5TransformersGhorasal 200 M
Page 46 and 47: 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 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 98 and 99: 9.4 CABLE ERECTIONConcrete lined ca
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
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12. FUEL OIL SYSTEM AND HANDLING FA
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from unloading base to the fuel tan
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13. FIRE PROTECTION FACILITIES13.1
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System of lock off to (but not exit
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Section 14Communication FacilitiesG
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14. COMMUNICATION FACILITIES14.1 GE
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(2) General CommunicationWhen the o
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(1) BatteryType of batteryCapacityN
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15. MAINTENANCE FACILITIESPage15.1
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15.1.4 RATINGThe rating of the cran
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The main power supply shall have a
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Static tests of all automatic seque
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Section 16Tests And InspectionsGhor
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16 TESTS AND INSPECTIONS16.1 GENERA
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subjected to the following tests by
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c. Stranded Conductors for Overhead
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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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