NATIONAL ALUMINIUM COMPANY LIMITED - Rites

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Construction details Degree of protection for enclosure IP 52 or better for indoor installation. Enclosure material: : The minimum thickness shall be 2.5 mm. Tender shall include enclosure with the thickness required red for the shape and mechanical/ electrical strength point of view. Aluminium enclosure shall be provided for rating equal or more than 3000A. MS enclosure may be provided for LT bus ducts of rating less than 3000A. Provision shall also be provided for draining moisture. Maximum temperature of enclosure under rated operating conditions limited to 70 70˚C. Rubber bellows shall be provided at transformer end to take care of vibration. GI supporting structures, wherever required, shall be provided with necessary hardwares. In horizontal run of more than 10 mtr of bus ducts expansion joint with copper flexibles shall be provided at every 10 mtr interval. Maximum temperature of enclosure under rated operating conditions limited to 70 70˚C. Bolted covers with gaskets sshall hall be provided for easy inspection and access to insulators and bus bar joints. Gasketted (Neoprene) connections shall be provided between adjacent sections of metallic enclosure. Tinned copper flexible shall be considered for connection of bus ducts at transformer end as well as PCC end. Rubber bellows at transformer end shall be provided to take care of vibration. Seal off bushing and frames complete with bolts. Provision shall be provided for draining the moisture. Provision shall be provided for mounting the bus ducts on brackets. The bus duct shall include straight run, 90 degree bend, Phase crossover chamber, transformer end chamber, tinned copper flexible, wall frame assembly, rubber bellows and other accessories as per the requirements.] Busbars rs and connections. Bus bar material shall be EC grade aluminium alloy equivalent to E91E WP conforming to IS 5082-1981. Final operating temperature of both bus bars and joints under continuous operation in enclosure limited to 85˚C ˚C by thermometer method. While designing the bus duct, site condition and solar radiation shall be taken care of. Bus bar arrangement shall be as per IS 5578 5578-1991. 1991. Phase identification shall be by colour at ends and at regular intervals. Busbar joints shall be of bolted type, cad cadmium mium plated with zinc bichromated high tensile steel bolts, nuts and spring washers and coated with oxide inhibiting grease prior to jointing. Copper flexible busbars shall be tinned. Copper flexible connections shall be provided for termination on equipment as well as on expansion joints. Bimetallic joints /strips shall be provided for jointing between dissimilar metals (if required). Bus bar support insulators of non non-hygroscopic hygroscopic material having impact and di di-electrical strength with an anti-trackin tracking contour. Bus duct of 3000 A and above rating shall be interleaved type. Bus conductor shall be given a coat of black mat point. Protective earthing Double earthing shall be provided for enclosure of bus ducts. Technical Specification:Sec-6, Electrical Page 24 of 97
Two numbers 50 x 6 mm GI flat earth buses sshall hall be provided running separately throughout the length of the bus duct, positively connected to the enclosure body of the bus ducts. Provision shall be there at each end of bus duct for terminating external earth conductor. Surface treatment Two Coats of synthetic enamel paint for indoor application shall be provided. Various standard procedures shall be followed in this regard for a quality work. Shade of paint Interior Exterior Technical particulars of LT busducts Applicable standard : IS - 8623 Rated system voltage & frequency : 415V, 50 Hz Maximum ambient temperature : 50˚C System earthing System short circuit level(kA rms) : 50 KA Maximum voltage at which bus duct can operate continuously : 500 V Location of bus duct : Indoor Type of bus duct Material of main busbar : Aluminium Alloy Rated continuous current : As specified Earth bus material Bus duct support structure required :` To be provided Rated continuous current : As specified Rated short time withstand capacity : 50 kA Rated short time withstand duration : 1 sec Technical Specification:Sec-6, Electrical : Black/white/light yellow : As per technical particulars : Solidly grounded : Non Phase segregated : Aluminium Page 25 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,
Page 99 and 100: shall not be done in foggy weather.
Page 101 and 102: i. Pollution n Control Regulations
Page 103 and 104: i) Procedure for initial checking a
Page 105 and 106: (k.) All manufacturing, fabrication
Page 107 and 108: (v.) After final acceptance of indi
Page 109 and 110: y the Engineer shall not relieve th
Page 111 and 112: 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: Specifications for miscellaneous ma
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 and 164: Suitable under-carriage carriage fi
Page 165 and 166: 21. Suitable for parallel operation
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
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front design. The distribution boar
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Encl: IP-45 Control voltage - 220 V
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1. Procedure mentioned in manufactu
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Dispatch clearance shall be given b
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The acceptance test on the system s
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6. Functional test 7. Capacity test
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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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