NATIONAL ALUMINIUM COMPANY LIMITED - Rites

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6.0 Neutral grounding Resistor 6.1 Rated current 6.2 Application 6.3 Service 6.4 Resistor material & connection : Punched stainless steel grid element type 6.5 Maximum allowable over ambient 50 0 allowable temperature rise C 6.6 Enclosure degree of protection : IP - 55 7.0 System Fault Level 7.1 H. V. 7.2 L. V. 8.0 Conductor material : Electrolytic grade copper 9.0 Creepage distance mm/KV : 3lmm/kV 10.0 Terminal connections 10.1 H. V. 10.2 L. V. 11.0 Marshalling box Degree of protection : IP:55 Power frequency to withstand voltage of 33 KV system should be 75KV.Impulse KV.Impulse test voltage should be 170KV for system voltage of 33 KV. 4.7.12 Technical Particulars of Dry type transformers (LT) 1. Rated capacity 2. Cooling 3. Duty 4. Voltage ratio (HV/LV) 5. Impedance 6. Winding connection 7. Vector group 8. Termination 9. Tap changer 10.Range of tap changer 11. Short circuit level 12. Earthing system (33 kV) 13. Earthing system (415 V) 14. Bushing CTs 15. Ratio of neutral bushing CTs 16. Impulse test withstand voltage (HT/LT) 17. Power frequency rated short duration 18. Temp. rise above 50 0 C 19. Overload capacity 20. Auxiliary supply voltage Technical Specification:Sec-6, Electrical : Less than 100A for 10 seconds : Grounding through Resistor : Outdoor : As per Standards : 25kA : 50kA : Segregated phase bus duct/Cable : Segregated phase bus duct/Cable : As per requirement : AN : Indoor : 33/0.440kV : As per IS : Delta/star : Dyn11 : HV : 33KV cable LV : Cable : OFTC : +5% in 5 steps @2.5% : 25 kA (33kV) for 3 sec : Low Resistance earthed kV) : Low Resistance earthed 13. Earthing system (415 V) : Solidly earthed : On neutral al bushing CTs : As required for Standby E/F Restricted E/F 16. Impulse test withstand voltage (HT/LT) : As per IS/IEC 17. Power frequency rated short duration : As per IS/IEC withstand voltage (HT/LT) : 80 0 : As required for Standby E/F Restricted E/F : As per IS/IEC withstand voltage (HT/LT) C : As per ANSI standard 20. Auxiliary supply voltage : 240V AC Page 38 of 97
21. Suitable for parallel operation : Yes 4.8 VARIABLE VOLTAGE VARIABLE FREQUENCY DRIVE Basic design particulars All VVVF Converters shall have Digital Control Technology with vector less control. VVVF shall communicate to basic automation system. Type of connection • Three phase frequency converters with rectification and inversion i.e. variable voltage and variable frequency output with current source / voltage source (PWM) inverters. • Line reactors for harmonic and noise suppression • Suitable for 415 V , 3 phase ,50 Hz , 4wire neutral earthed system Overload capacity • 150% of the rated current for 1 minutes followi following ng 100% load & to meet the drive overload capacity. • Efficiency more than 95% at full load • Suitable to withstand vibrations more than 0.59. • Output frequency : 5-50 Hz (Constant torque) 50-100 Hz (Constant power) • Ramp rate: Linear acceleration and dec deceleration eleration adjustable independently. Power components The main power components of the VVVF equipment shall have the following incoming AC side: • Matching input power transformer / reactor • AC line surge suppression network. • ACB/MCCB • Line contactors Converter –Inverter Inverter Equipment • Thyristor converter bridge for AC/DC • DC link circuit with reactor/capacitor • Inverter bridge for DC/AC • PLC to take care of interlocking and sequencing etc. • Mimic panel where drive is HT Load side • Filter network • Step-up up transformer, as required • Isolator and over over-load relay for each motor. By-pass Arrangement Technical Specification:Sec-6, Electrical Page 39 of 97
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NATIONAL ALUMINIUM COMPANY LIMITED
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1.0 GENERAL M/S. National Aluminium
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It is conveyed to the storage Yard
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existing conveyor BC-104. 104. Coal
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provided sufficient information is
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Equipment and services covered unde
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elow wagon tippler hopper including
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3.1.24 First fill of all consumable
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galleries, trestles, penthouses, Wa
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Apron feeder will feed coal unloade
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The LD shall be assessed on the bas
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13.0 START-UP UP & COMMISSIONING SP
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1.1. GENERAL Technical Specificatio
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1.1.16 The offer shall be complete
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The supply of conveyor galleries, t
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1.2.15 Installation stallation and
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After erection, the damaged portion
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• Supply of all commissioning spa
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(b) Guaranteed (rated) capacity: 12
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• Guideline for wagon tipplers is
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is activated, all conveyors will al
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Wagon Tippler a). Motor O/L - not t
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linking while the faulty conveyor /
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automatic controls for positioning,
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platform with a minimum accuracy of
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A. Wagon Tippler Hopper Constructio
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8.4.3 The arm shall be raised and l
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10.5 DATA SHEET Capacity (TPH) : 15
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12.4 DATA SHEET: DRIVE EQUIPMENT GE
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Nos (Total 4 Nos in the Crane ffor
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lifted over/by the side of other eq
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14.3.3 Trolley wheels shall be of s
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15.2.3 Transfer chutes shall be ade
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shall be placed internal to the dri
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2.3.4 Manual Operation (a) (b) 2.3.
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supports, pumps, tanks, etc. as req
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a. Pump casing may be axially or ra
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(i) Base plates together with found
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impregnated tar felt. The lap joint
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3.3.0 Pipings & Fittings 3.3.1 Join
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(j) Y Strainer 17.0 VENTILATION SYS
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• IS:2312 :Propeller type AC Vent
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17.5.22 Condenser capacity control
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The media of the filter shall be ma
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2.4.5 Condenser: Air cooled type 2.
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) Suitable access staircase with sa
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18.3 ADDITIONAL DESIGN CRITERIA a)
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i) Gallery Trusses Span / 400 ii) T
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i) Removal of bends, kinks, twists,
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shall not be done in foggy weather.
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i. Pollution n Control Regulations
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i) Procedure for initial checking a
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(k.) All manufacturing, fabrication
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(v.) After final acceptance of indi
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y the Engineer shall not relieve th
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Each main and auxiliary item of pla
Page 113 and 114: (a) His organisation structure for
Page 115 and 116: 4.12.10 Welding procedure qualifica
Page 117 and 118: (c) Manufacturer / works test repor
Page 119 and 120: make modifications that may be nece
Page 121 and 122: endanger the safe operation of the
Page 123 and 124: The equivalent 'A' weighted sound p
Page 125 and 126: shall be done. In case of junction
Page 127 and 128: ELECTRICS FOR WAGON TIPPLER SYSTEM
Page 129 and 130: 1.5 Safety All equipment shall be c
Page 131 and 132: • Static and dynamic loading of t
Page 133 and 134: All cables Power cable, Control Cab
Page 135 and 136: Following power utilization standar
Page 137 and 138: Ammeter for Wagon Tippler, Apron fe
Page 139 and 140: • Relay should have heavy duty tr
Page 141 and 142: Air break, drawout type conforming
Page 143 and 144: Internal control wiring shall be by
Page 145 and 146: POTENTIAL TRANSFORMERS 1. Type 2. P
Page 147 and 148: Where such sealants or adhesives sh
Page 149 and 150: Specifications for miscellaneous ma
Page 151 and 152: Two numbers 50 x 6 mm GI flat earth
Page 153 and 154: Paint shade Phase crossover chamber
Page 155 and 156: Degree of protection for motor and
Page 157 and 158: The other technical particula parti
Page 159 and 160: stress, noise on communication syst
Page 161 and 162: CTs for back up earth fault (51N) a
Page 163: Suitable under-carriage carriage fi
Page 167 and 168: • Sequence module • Zero speed/
Page 169 and 170: iii) LED status indication iv) BCD
Page 171 and 172: • The communication subsystem bet
Page 173 and 174: Static Transfer Switches The static
Page 175 and 176: 9. Continuous load/duration : As pe
Page 177 and 178: 4. A/C & ventilation RRoom 5. Perip
Page 179 and 180: The LDBs shall be fabricated from C
Page 181 and 182: The miniature circuit-breakers brea
Page 183 and 184: Outgoings : MCCB TPN of 32 A : 10 N
Page 185 and 186: type terminals for taking looping c
Page 187 and 188: The starter holders shall be of wel
Page 189 and 190: essentially have a 3 points suspens
Page 191 and 192: The wall thickness of each section
Page 193 and 194: While designing the earthing system
Page 195 and 196: Ring mains LT PCCs/board Control Pa
Page 197 and 198: Bidder shall include complete elect
Page 199 and 200: The VCB shall be indoor drawout typ
Page 201 and 202: front design. The distribution boar
Page 203 and 204: Encl: IP-45 Control voltage - 220 V
Page 205 and 206: 1. Procedure mentioned in manufactu
Page 207 and 208: Dispatch clearance shall be given b
Page 209 and 210: The acceptance test on the system s
Page 211 and 212: 6. Functional test 7. Capacity test
Page 213 and 214: SN IS Standard with Latest Amendmen
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SN IS Standard with Latest Amendmen
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e prepared in Auto Cad (latest vers
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plates under the conveyor galleries
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specifically called for in drawings
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preferably be not less than 4.5 cut
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12.0 LOADING For consideration of l
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or as directed by the Engineer. The
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slowly to make a Slurry Mix. For pr
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Dado in toilets and pantries shall
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above e the ground except for rail
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All standards, specifications, acts
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1.0 GENERAL 1.1 The following provi
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6.2 Before the Contractor connects
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13.2 The Contractor shall have the
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the site. Illumination of wagon tip
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21.4 The Contractor shall provide e
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(c) The testing schedule sh shall a
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(j) The Contractor shall be respons
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33.0 PAINTING All exposed metal par
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37.4 The Contractor shall provide s
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earing housing shall not exceed for
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Technical Specification:Sec-8l v. C
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All installation procedures shall c
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55928 (Part 4) or BS 4232 or IS 147
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5.0 FINISH PAINTS (F) Finish paint
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SP - Surface preparation quality 2P
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Transformer oil Fuel oil Coke oven/
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LIST OF MANDATORY SPARES A. MECHANI
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6.0 Electric Hoist 7.0 Manual Hoist
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PDB/LDB/SLDB/AUX. PDB LT TRANSFORME
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INFORMATIONS TO BE FURNISHED BY THE
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HYD.POWER PACK DETAILS FOR WT Type
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Excitation voltage Safe overload Ul
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No.of wagon handled by Indexer Oper
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iii) Shaft deflection at hub iv) La
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13. Make, ratings, type of limit sw
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Technical Specification:Sec-9,Misce
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6. Equipment wise List of commissio
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MCC WISE DATA Sl. No RELAYS METERS
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4. Value of earthing resistance (pr
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LIGHTING MAST General 1. Make : 2.
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5.4 Centrifugal Fan a) Make & Model
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j) Shaft power k) Drive details a.
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1.0 FORMAT FOR GENERAL AND COMMERCI
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8.0 LIST OF DRAWINGS ENCLOSED WITH
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D) Fluid Coupling Schedule E) Idler
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In case the Tenderer/ Contractor in
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17 Lighting & Power panels 6. Preci
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47. Signal and Instrumentation 5.KE
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16. 4” dia portable motor operate
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1.0 COMPLETION SCHEDULE Special Ins
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(i) Bids that do not meet the quali
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1.0 COST OF BIDDING 1.1 All direct
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5.2 Any addendum thus issued will b
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discrepancy between the quoted lump
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. GENERAL CONDITIONS OF CONTRACT CO
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. 1.00 APPLICATION Unless otherwise
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. 2.22 `Writing’ shall include an
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. 4.02 For Erection Supervision Ser
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. American Petroleum Institute (API
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. Dimensions of each package shall
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. 11.0 INSURANCE 11.01 The Owner wi
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. c) Drawing submission schedule in
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. Erection schedule giving the sequ
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. premises, the Contractor shall ob
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. (I) Loads at which tests will be
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. 24.02 Completion Certificate With
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. 27.00 MAINTENANCE AND GUARANTEE -
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. have the option and be at liberty
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. him to the Contractor under the c
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. 38.00 PROGRESS REPORTS AND PHOTOG
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. The Purchaser; shall pay the Cont
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. All registration and statutory in
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. During the progress of work the C
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. Before completion of erection, th
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. his own cost for distribution to
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. (iii) Final adjustment of foundat
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. (a) The work procedures that are
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. 44.18 Construction Management (a)
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. 45.00 FOREIGN PERSONNEL 45.01 The
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. For the purpose of appointing the
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. The Contractor shall prepare and
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. waiver of such provisions, rights
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Tender Notice No. - …………...
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IMPORTANT AGREED TERMS & CONDITIONS
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Sl. Descriptions Vendor’s confirm
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Sl. Descriptions Vendor’s confirm
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SL. NO. REFERENCE OF NIT DOCUMENT D
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Tender Notice No. - ……………
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Page 1 of 2 ANNEXURE - VII PROFORMA
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Tender Notice No. - …………. P
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Tender Notice No. - …………..
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1.0 General PACKING, MARKING, SHIPP
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PACKING, MARKING, SHIPPING AND DOCU
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PACKING, MARKING, SHIPPING AND DOCU
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