Tamil Nadu Generation And Distribution Corporation Limited Tender
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Tamil Nadu Generation And Distribution Corporation Limited - TANGEDCO Tender
Electrical Generators And Transformers
Electrical and Electronics
Eprocure
Opening Date10 Mar 2023
Closing Date23 Mar 2023
Tender Amount₹ 2,68,45,000
Costs
EMD
₹ 2,74,600Document Cost
Refer DocumentsTender Fee
Refer Documents
Summary
Rectification And Replacement Including Reinsulation Of Defective Stator Coils In All Three Phases With Vpi System Of Insulated Coils In 100 Mw Generator Of Kadamparai Ph
Description
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Contact
Tender Id
2023_EB_294174_1Bid Award Id
ViewTender No
HE-2456Tender Authority
Tamil Nadu Generation And Distribution Corporation Limited ViewPurchaser Address
-Website
http://https://www.tangedco.gov.in/
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Documents
BOQ Items
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Charges towards removing the top coils by de-wedging and removing the overhang bandings with special jigs and fixtures.
99
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Charges towards removing the old failed insulation and re-insulating on both sides overhang portion on released slot insulation healthy top coils and testing by VPI system of insulation. The following tests are to be carried out :
i.IR value at 5 KV before HVAC test
ii.HVAC test at 18 KV
iii.IR value at 5 KV after HVAC test
97
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Charges towards removing the bottom coils by de-wedging and removing the overhang bandings with special jigs and fixtures.
53
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Charges towards removing the old failed insulation and re-insulating on both sides overhang portion on released slot insulation healthy bottom coils and testing by VPI system of insulation The following tests are to be carried out :
IR value at 5 KV before HVAC test
HVAC test at 18 KV
IR value at 5 KV after HVAC test
49
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Charges towards cleaning the burnt out copper debris and carbon deposits completely with suitable method before HVAC test(dry ice cleaning)
1
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Charges towards making of continuity of other coils in the circuit, testing the whole Generator to ascertain the healthiness of other coils.
i) IR value at 5 KV megger before and after HV AC test. ii) HV AC as per instruction of field engineers. iii) PI value at 5 KV megger.
1
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Charges towards installing the spare/re-insulated tested bottom coils (Spare coils shall be supplied by TANGEDCO) with using fresh liners, end banding the overhang portion with fiber tapes and cards using the binding cement of epoxy resin.
53
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Charges for installing the spare/re-insulated tested top coils (Spare coils shall be supplied by TANGEDCO) with using fresh liners, wedges, end banding the overhang portion with fiber tapes and cards using the binding cement of epoxy resin,, soldering the non-connection and connection side end ferrules and jumpers and insulating the jumper joints & providing end caps.
99
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Charges for supply of Class F new top stator coils(VPI type)
Note :if sufficient spare healthy top coils are not supplied by TANGEDCO then this supply portion is required.
2
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Charges for supply of Class F new Bottom stator coils (VPI type) Note :if sufficient spare healthy top coils are not supplied by TANGEDCO then this supply portion is required.
4
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Charges towards removing the old failed insulations on slot portion and both overhang portions and re-insulating slot portion and both sides overhang portion including testing by using VPI System of Insulation. The following tests are to be carried out : i) IR value at 5 KV before HVAC test ii) HVAC test at 23 KV iii)IR value at 5 KV after HVAC test iv)Tan Delta and Capacitance Measurement
(This is applicable for those top and bottoms coils where the slot insulation failed during HV test.)
6
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Charges for dismantling, removing the bends, refurbishing and installation of 1 No. bus bar and insulation
1
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Charges for re-insulation and installation of bus bar
5
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Charges for re-insulation of jumper
11
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Charges for re-insulation of rotor pole jumpers and take-off leads
2
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Charges for re-positioning the pole in the rotor spider, locking the keys, fixing the ’V’ blocks with suitable insulation
4
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Charges for making end connection, locking the jumpers and connection links with suitable insulated locks, soldering the end connection.
4
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Charges for cleaning of stator and rotor windings and drying out
1
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Charges for conducting the following test on stator and rotor.
Stator:i) IR value at 5 KV megger before and after HV AC test. ii) HV AC as per instruction of field engineers.iii) PI value at 5 KV megger.iv) PI value v) Winding resistancevi) Tan Delta at 11 KV in the steps of 0.2VL, 0.4VL, 0.6VL, 0.8VL and 1.0 VL Rotor:i) IR value at 500V ii)Winding resistance iii)Surge test at 1 KV iv)AC Drop test
1
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Charges for Dynamic in-site balancing test and vibration test of whole rotor assembly
1
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Charges for assembling the stator top and bottom air guides, checker plates and commissioning the Generator.
1
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CGST in % (For Bidders inside TamilNadu)
1
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SGST in % (For Bidders inside TamilNadu)
1
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IGST in % (For Bidders outside TamilNadu)
1
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