BANGLADESH POWER DEVELOPMENT BOARD TENDER ... - BPDB

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8.10.3 CONTROL EQUIPMENT(1) TransmittersIndicating transmitters shall be provided for control loops as required.Transmitters shall be substantially unaffected by changes in temperature and inprocess static pressure over a range from zero to twice the normal operatingpressure. Transmitter shall feature accessible zero. and span adjustment.(2) Final Control ElementsControl valves and damper actuators shall be pneumatic, where necessary,provided with electric- to-pneumatic converters. The response of final controlelements shall have minimum time lag.a. Control ValvesControl valves rated at 2,00 kN/ sq.m (300 lbs ASA) and below shall be flangedand higher rating shall be welded. Valves shall with stand shock loads imposed bythe processor. control valve actuators shall be sized to overcome packing frictionand dynamic stem forces. Unbalanced force shall be kept to a minimum levelconsistent with efficient operation in service.b. Damper ActuatorsDamper actuators shall be fully enclosed and supplied with all accessoriesincluding special mounting brackets if required. A solenoid operated, four waypneumatic valve plus open and close limit switches shall be included.(3) RecordersThe recording instruments shall be of the multi or single point strip chart type.Circular chart recorders shall not be used. The recorder shall display the previousfour hours. Roller type charts shall have a duration of 30 days as minimum. Thewhole of the recording mechanism shall be withdrawable from its case from thefront for maintenance.Micro-processor based recording and data acquisition system with printer alsomay be provided.Positioners and E/P Converters(4) Positioners shall be furnished with final control elements where:- small change in pneumatic signal are to be amplified- Split range control is required- valve pressure drop is greater than 280 kN/sq.mPositioners shall have a feedback cam to characterize relationship between inputsignal and final element position.E / P converters shall be provided to convert electronic control signals topneumatic output signals. Converter accuracy shall be plus / minus 0.5% ofoutput span.Ghorasal 200 MW to 300 MW Gas Turbine Peaking Power Plant Project (Vol-2 of 3)88
(5) Solenoid ValvesAll solenoids shall have class F insulation or higher class and solenoid enclosureshall be of weatherproof construction.Solenoid for operation on AC shall give satisfactory operation over the range of 75% to 120 % AC supply voltage.Solenoid for operation on DC shall give satisfactory operation over the range of 85% to 115 % DC supply voltage.8.11 PANEL CONSTRUCTIONAll panels except local control box shall be constructed using steel plate not lessthan 3.2 mm thick.(1) Vertical Panel of Front FaceThe panel shall be fitted with indicating instruments, annunciator lamps, operatingindicators, watt-hour meter and recorders (for generator's output, voltage andfrequency) etc. necessary for operation.(2) Slant PanelThis panel shall be fitted with control switch, indicating lamps and mimic bus, etc.,necessary for operation.(3) Vertical Panel of Rear FaceThis panel shall be fitted with protection relays, etc.(4) Panel Interior Space (230 kV switchgear control and protection panelsonly)Sliding type doors shall be furnished on the both sides of panel for access to paceshall be provided in the middle of front and rear faces of the panel to enable aman to pass through it. Chequered plate shall be furnished at the bottom of thepanel.(5) Type of Indicating Meters110 mm square with about 240 0 C of seal angle, flush mounting type with 1.5class accuracy, or other approved type by the Board.(6) Testing Power sourceAs a result power source for protective relay, meters, etc., one set of 50 Amoulded case circuit breakers of 3 phase 415 V and DC 125 V shall be provided.(7) Test BlocksTest blocks for P.T. and C.T. circuits, shall be provided on the panel as required.Ghorasal 200 MW to 300 MW Gas Turbine Peaking Power Plant Project (Vol-2 of 3)89
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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
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 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 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
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
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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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