BANGLADESH POWER DEVELOPMENT BOARD TENDER ... - BPDB

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9. CABLING AND GROUNDING9.1 GENERAL(1) ScopeThe Contractor shall design, supply, install, terminate and commission all thecables for the plant.(2) Voltage DropThe maximum permissible voltage drop shall be such that in on case shall thedrop exceed 2.5% under normal running condition and 10% under motor starting.(3) ArmouringAll cables except 230 KV power cables, control and instrument cables shall beprovided with galvanised steel wire or steel tape armour and PVC cover sheath.9.2 CABLE TYPES9.2.1 11 kV XLPE <strong>POWER</strong> CABLE & ISOLATED PHASE SOLID BUS.(1) The cable shall be stranded annealed copper conductor.The construction of the conductor shall be the compacted circular single coretype. The size of the conductor shall be capable to carry the rated capacity ofeach feeder and at specified site conditions without exceeding its maximumtemperature i.e. 90 0 C. The minimum size of 11 KV cable shall not be less than100 sq. mm. The copper conductor shall comply with latest IEC Standard.(2) InsulationThe insulation material shall be extruded cross linked polyethylene of lowdielectric loss, high dielectric strength, low thermal resistivity and long termstability. It shall be free from contamination by oil, chemical and moisture. Theextrusion process shall ensure that the insulation is homogenous and The singlecore 11 kV XLPE Copper conductor power cable and other necessary items for thecompletion of the cable system.The power cable and accessories shall be designed and constructed in accordancewith the requirements of latest IEC Standard. High Voltage Cross linkedPolyethylene Insulated cable" and the most up-to-date experience for a system ofthis voltage level and shall incorporate the latest improvements of design andmanufacture for the type of cables and accessories required.Free from voids and impurities. The process shall be dry method. The averagethickness of insulation measured at section shall not be less than the valuespecified in the standard.(3) TerminationsThe end terminating materials shall be supplied for the termination of 11 KVcables.Ghorasal 200 MW to 300 MW Gas Turbine Peaking Power Plant Project (Vol-2 of 3)94
9.2.2. 6.6 kV XLPE <strong>POWER</strong> CABLESThe single or triplex core 6.6 kV XLPE copper conductor power cable and othernecessary items for the completion of the cable system.The power cables and accessories shall be designed and constructed inaccordance with the most up-to-date experience for a system of this voltage leveland shall incorporate the latest improvements of design and manufacture for thetype of cables and accessories required.(1) The cable shall be stranded annealed copper conductor.The construction of the conductor shall be the compacted circular single or triplexcore type. The size of the conductor shall be capable to carry the rated capacity ofeach feeder and at specified site conditions without exceeding its maximumtemperature i.e. 90 0 C. The minimum size of 6.6 kV cable shall not be less than 60sq. mm.(2) InsulationThe insulation material shall be extruded cross-linked polyethylene of lowdielectric loss, high dielectric strength, low thermal resistivity and long termstability. It shall be free from contamination by oil, chemical, and moisture. Theextrusion process shall ensure that the insulation is homogeneous and free fromvoids and impurities, and it shall be dry method.(3) TerminationsThe end terminating materials shall be supplied for the termination of 6.6 kVcables.9.2.3 600 V Power CablesThe cables shall be rated 600 volts for installation in cable trays, conduits andcable ducts.All auxiliary power cable with a nominal conductor area of 60 sq. mm and aboveshall be stranded annealed copper conductor, XLPE insulated with galvanised steelwire or steel tape armour and PVC sheathed. All other auxiliary power cables shallbe stranded annealed copper conductor, PVC insulated with galvanised steel wireor steel tap armour and PVC sheathed. All auxiliary power cables shall bedesigned, fabricated and tested in accordance with the latest IEC Standard.The cables shall have copper conductor and shall be selected with dueconsideration to load requirements of each feeder and short circuit currentcapacity of the cable in order to prevent premature insulation failure. Theconductor insulation shall be numbered or colour coded.For motor circuit, the cables shall have a current carrying capacity of at leastequal to 115% of the full load current rating of the motor after application of theappropriate derating factors.Cable supports shall be provided for the cables and shall be at least one cablesupport bracket per vertical section for interconnection between adjacentsections. The minimum size of power cable shall be of 10 sq.mm.Ghorasal 200 MW to 300 MW Gas Turbine Peaking Power Plant Project (Vol-2 of 3)95
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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
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 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 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
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
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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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