Tender For Provision Of Lightning Arrestor For Mdf Room And Other Earthing Infra For Critical Sites At Af Stn Mohanbari
Tender Value
37.50 Lakhs
Estimated cost
Bid Submission
28 Nov 2024
0 days left
EMD
75000
Bank guarantee accepted
Document Fee
500
Non-refundable
Tender Type
Online
Tender Overview
Organization
Tender ID
Competition Type
NCB
Bidding Type
Tender
Location / State
mohanbari → Assam
EMD Exemption
Not Available
Quantity
Not Available
Website
Contact Person
Address
Project Description
Tender For Provision Of Lightning Arrestor For Mdf Room And Other Earthing Infra For Critical Sites At Af Stn Mohanbari
Corrigendum
| Sr No | Corrigendum Date | Corrigendum | Type | New Submission Date |
|---|---|---|---|---|
| 1 | 21-Nov-2024 | Bid Auto Extn Corrigendum | Bid Auto Extn Corrigendum | 28-Nov-2024 |
BOQ
| Sl. No. | Item Description |
| 1 | M&L for study of earth/soil resistivity (tomographic survey of soil) by Conducting earth resistivity test using earth tester to find out the resistivity of the plot and to obtain polar resistivity curve and average resistivityin eight direction at AF Stn Mohanbari and submitting the report with recommendation and complete detailed specification of earthing to be considered for obtaining earth resistance value less than 1 ohm complete all as specified and directed. Note :-(i) The unit rate also include for necessary excavation in any type of soil(ii) Report shall be submitted in duplicate set. (iii) Study at one location shall be measured and paid at one job.(iv)Contactor shall submit guarantee @ 5% of quoted rate against this item to ensure earthing results as per design. The same shall be released after successfully completion of Phase-II.) |
| 2 | Material and labour for earthingwith copper earth plate electrode 600 mm x 600 mm x 3.15 mm thick, burried directly in ground vertically to a depth of not less than 2.25 mtr below ground level connected to copper strip of size 20 x 3 mm as earthing leadmeans of nut, bolts and washers made out of Brass and 40 mm dia GI pipe \"light grade\" for protection of earth lead and connected to control board or main switch or as directed by Engr -in-Charge including earthing pit in PCC (1:3:6) type C-1, pre-cast reinforced cover with MS XPM Jalli, RCC 1:1.5:3 cover slab of size 300 x 300 x 100 mm with one handle made out of 8 mm dia round bar 20 mm dia GI pipe light grade for watering funnels, wire mesh and provided charcoal or coke of alternative layers of 15 cm including necessary earth work complete shown in electrical plated No 3 and tesing complete all as specified and directed.Note : (i) The earthing pit should be provided with proper earth pit and pit cover. Pit cover should be painted with synthetic enamel paint of approved colour and pit number to be marked on a GI plate above 45 cm from GL as per colour code followed in AF Station.(ii) If the desired earth registance is not achived during testing as per IS the complete earthing shall be carried out by the contractor at his own cost and no extra claim shall be admissable. |
| 3 | Material and labour for earthingwith galvanised earth plate electrode 600 mm x 600 mm x 6 mm thick, burried directly in ground vertically to a depth of not less than 2.25 mtr below ground level connected to galvanised iron strip 25 mm x 4 mm thick, by means of nut, bolts and washers made out of galvanised iron mild steel and 50 mm dia GI pipe \"light grade\" for protection of earth lead and connected to control board or transformer neutral earth or as directed including earthing pit in PCC (1:3:6) type C-1, pre-cast reinforced cover with MS XPM Jalli, RCC 1:1.5:3 cover slab of size 300 mm x 300 mm x 100 mm thick, with one handle made out of 8 mm dia round bar 20 mm dia GI pipe light grade for watering funnels, wire mesh and provided charcoal or coke of alternative layers of 15 cm including necessary earth work complete shown in electrical plated No 3 and testing complete all as specified and as directed. |
| 4 | Supply and fixing aluminium strip of size 25x3.15 mm for earth continuity conductor fixed on PCC block complete all as specified and directed. |
| 5 | Supply and fixing in repair for earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required for 20 mm x 3 mm thick, copper strip using porcelain clit/post insulators complete all as specified and directed. |
| 6 | Supply and fixing GI protection pipe of 40 mm dia light grade for strip protection including all fittings laid in trenches or fixed on pole/ walls/ laid in floor with mild steel clamps, bolts, nuts and washers complete all as specified and directed. |
| 7 | Supply and fixing in repairs Air termination, single pointed, copper rod 12 mm dia and 300mm long fixed on copper strip for earth conductivity to ground complete all as specified and directed. |
| 8 | Supply and fixing test point terminal block made of gun metal or phosphorous bronze, size 75mm x 75mm x 25 mm thick, drilled and screwed including 3 Nos. 8 mm dia. 25 mm long hexagonal head screws, includingMS box 2 mm thick of suitable size for protection of test point terminal, including dismantling of old unserviceable test pointcomplete all as specified and directed. |
| 9 | Supply and fixing porcelain insulator of size 65x31 mm and height 30mm with three nos hole including GI bolts and nuts of required size and two nos washer on PCC, fixing strip complete all as specified and directed. |
| 10 | Supply and fixing GI protection pipe of 40 mm dia light grade for cable protection including all fittings laid in trenches or fixed on pole/ walls/ laid in floor with mild steel clamps, bolts, nuts and washers complete all as specified and directed. |
| 11 | Supply and fixing GI pipe of 80 mm dia medium grade incl making of cap at top of pipe with the help of GI sheet. GI Pipe are used to fixing of lightning protection system including necessary arrangement for fixing of porcelain insulator for laying of strip complete all as specified and directed. |
| 12 | M & L for PCC work providing PCC 1:2:4 type B2 using 40 mm graded stone aggregate in foundation for porcelain insulator/Pole and finishing the surface even and smooth without using extra cementcomplete all as specified and directed. |
| 13 | Supply,connecting, testing complete of Isolation transformer 1.0 KVA capacity with Single Phase input and Single Phase output, 230 volts complete all as specied and directed. |
| 14 | Supply,connecting, testing complete ofsurge supressor device (SPD) Single Phase& neutral input and Single Phase & neutral output,with two module, 230 volts, protection against direct and indirect lightning surges complete of 10 KA min capacity complete all as specified and directed. |
| 15 | S&F in repair / replacementof submain wiring with 2 X 4.0 sqmm, PVC insulated, unsheathed, copper conductor cable, multistranded, single core, FRLS type, 1100 volts grade alongwith 1 X 4.0sqmm PVC insulated, unsheathed, copper conductor cable, multistranded, single core, FRLS type, 1100 volts grade for continuous earth wire complete drawn through and including PVC casing caping, medium grade of suitable size with all fittings such as bend, elbow, tee, joint including making good the disturbed surface complete all as specified and directed. |
| 16 | S&F in repair of sheet metal enclosure, single pole and neutral with two pin and earth plug and socket, 20 Amps, 230 volts, 50 Hz complete with one single pole MCB of 20 Amps, 10 kA, 230 volts, 50 Hz, C curve type complete all as specified and directed. |
| 17 | S&F in repair of sheet metal enclosure, MCB DB, double door, single pole & neutral, 4 way, 230 volts, 50 Hz with suitable bus bar, neutral link, earth link complete all as specified and directed. |
| 18 | S&F in repairs MCB single pole and neutral, 32 Amps, 230 volts, 10 kA, C series complete all as specified and directed. |
| 19 | M&L for installation and testing of maintenance free earthing (as designed and approved under Phase-I) complete with earth electrode as per IS 3043 or latest tested for 254 micron copper bonded low carbon steel core of 3 meter long, 50 mm dia with 25x3 mm inner copper strip buried directly in ground and tapered at the bottom 175- 200 mm dia digging or auguring of earth to the required depth as approved tomographic survey report (received under Phase I above) and filled up in bottom with slurry 10 Kg plain bentonite for moisture and then with earthing chemical as per design under Phase-I as per IS/ IEC-62561-7 of Balanced Ph and less than 0.2 Ohm Resistivity carbon based earth enhancing compound in slurry form and quantity as per design. An arrangement for connection of copper strip (25x3mm) to rod connected by means of Universal Copper Ground Rod Clamp of size 135x35x3mm to the electrode, copper earth strip 25x3 mm connected by means of clamp, provision of HDPE pit cover with minimum 5KN load capacity chamber with cover including necessary excavation in any type of soil, returning filling in, removal of surplus soil complete all as specified and directed. |
| 20 | Contd 19-......Note:-(i) Phase-I completion is mandatory prior to start of work at a particular location.(ii) Earthing system shall be designed so as to achieve test result less than 1 Ohm depending upon the soil conditions for the minimum 2 Years under warranty.(iii) Copper strip to be extended upto the equipment and power room. It should be routed on the side wall of the underground duct fixed with ceramic/ porcelain/ PVC spacers and hot sleeves.(iv) Readymade HDPE pit chamber with cover having minimum load capacity 5 KN with connected items.(v) Copper strip should be 25x3 mm and length upto 7.5 Mtr is deemed to be included in the item qouted rate.(vi) The number of earthing electrode in each earthing pit shall be as per design carried out in Phase-I. Any extra cost for universal number of pits as per design shall be deemed to be included in item quoted rate.(vii) The Phase-II work shall be commenced after completion of Phase-I work. Make: As approved by GE on the basis of report received under Phase-I. |
| 21 | Material and labour laying well burnt old sizebricks, straight or curved on plan , laid flat with width equal to length of brick , laid dry over electric cable for protection all as specified. |
AI Tender Summary
Tender Timeline
Nov 21, 2024
11:30 IST
Tender Published
Tender notice published.
Completed
Nov 28, 2024
18:00 IST
Corrigendum-1 Issued
Clarifications on tender conditions and amendments issued.
CompletedNov 28, 2024
17:00 IST
Bid Submission Deadline
Online submission via eProcurement portal.
CompletedNov 29, 2024
Bid Opening Date
Technical bids will be opened and evaluated.
CompletedTender Documents
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