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NTID 42742595
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💬 Talk to Our Bidding ExpertCorrigendum Special Repair T in Dehradune - Complete Tender Details
Find eligibility criteria, important deadlines, bidding requirements, and download official documents for "Corrigendum Special Repair T" in Dehradune, India.
Military Engineer Services
Dehradune, Uttarakhand, India
NTID 42742595
- Opening Date : Fri 19th December, 2025
- Closing Date : Wed 17th December, 2025
- ₹ 13600000.00
- NTID 42742595
Key Values: Document Cost: 1000.00 | EMD: 211000.00 | Estimated Cost: 13600000.00
Tender Description
Corrigendum : Special Repair To Replacement Of Ber Power Transformer Capacity 1.6 Mva At Mrs Garhi Cantt And Other Allied Works For Dedicated Ht Feeder To Mh Dehradun
Documents
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Download Now – Only ₹200-
Document-1
721.3 kBOil_India_ExtraDoc...Oil_India_ExtraDocument-GCO0449P23.pdf
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Document-2
721.3 kBOil_India_ExtraDoc...Oil_India_ExtraDocument-GCO0449P23.pdf
Costs
-
EMD
211000.00 -
Document Cost
1000.00 -
Estimated Cost
13600000.00
Latest Corrigendum List
| # | Corrigendum Title | Corrigendum Type |
|---|---|---|
| 1 | Bid Auto Extn Corrigendum | Bid Auto Extn Corrigendum |
BOQ Items Total Items : 49 | Total Qty : 9164.15
| # | Item | Quantity | Units |
|---|---|---|---|
| 1 | Supply, installation, testing and commissioning complete with all accessories of transformer of 33 KV capacity 1.6 MVA step down, outdoor floor mounted, double copper wound, 3 Phase, 50 Hz, AC, Oil immersed, ONAN confirming to IS-2026 and IEC62770, including cooling fans, external cooling tubes/radiator cores type having voltage ratio 33000/11000 volts (corresponding to principal tapping ) winding delta connecting on Primary side (HV Side) and star connected on secondary side (LV side) in accordance with vector symbol Dyn11 (vector Group) with neutral brought out on LV side and looping on HV side for contact output so as to alter/ vary secondary voltage by (+) 5 to (-) 15% in equal steps of 1.25% to be changed by means of (OLTC) on load Tap Changer with floor mounted RTCC panel with AVR and marshaling box. Transformer shall be of BOLTLESS core design. Transformer shall be double wound, core type with low loss, non ageing, high permeability PRIME GRADE, CRGO with m4 grade or better, perfectly insulated and clamped to minimize noise and vibrations, core shall be purchased directly from manufacturer of core or from their accredited marketing network and not through any agent. Before placing order for procurement of transformer, the contractor shall submit the credentials in respect of the manufacturer of core and transformer shall be procured only after approval from GE in respect of name of manufacturer of transformer as well as manufacturer of core. The limit of termperature rise after continous full load runs as specified in IS/IEC 60076 shall be suitably adjusted to suit the ambient temperature of maximum 50 degree celsius prevailing at site all as specified and directed including having following characteristics :- | 1.00 | Each |
| 2 | The transformer shall confirm to the latest edition of applicable standard as follows :- (i) IS-2026, for tests and tolerance of guarnteed Particulars. (ii) IS-3639 for Fitting and accessories. (iii) IS2099 for Bushing >1000V. (iv) IS-7421 for Bushing <1000 V (v) IS-1271 for Electrical insulation classified by Thermal stability. (a) Winding: (i) HV Winding -Layer/disc winding (ii) LV Winding-Helical/Disc widing (b) Insulation Level: (i) HV-170 (ii) LV-70 (c) Insulation level (Power frequency with Stand KVrms): (i) HV 70 (ii) LV-28 | ||
| 3 | (d) Tapping Range -(+)5% to (-) 15% @1.25% (e) Tape Changer Type -On load Tap Changer +RTCC+AVR (floor mounted). (f) Temperature Rise (Oil/Winding) -50/55 Degree Centigrade (g) Hot spot temperature over a meximum yearly weight average ambient temp of 32 Degree Centigrade-98 Degree Centigrade (h) Termination HV/LV-Outdoor Bushing (j) Short Circuit thermal withstand time-02 seconds (k) %impedance at 75 C clurrent and frequency (Subject to IS Tolrance) at -6.25% + tolerance (l) No load loss at rated voltage and frequency (subject to IS Tolerance) (KW) = 2.3 KW (max) (m) Load loss at rated current and 75 degree C (KW) (subject to IS Tolerance ) = 16 KW (max) | ||
| 4 | The transformer should have following fitting and accessories :- (a) Outdoor bushing on 11 KV secondary side for single core XLPE cable 3 Core 185 Sqmm - (Bare Bushing) (b) Outdoor 33 KV bushing insulator for connection through openconductor with sleeves. (c) Oil conservator with filling hole and cape drain valve and oil level guage. (d) Dehydrating breather wth connecting pipe first fill of dehydrating agent and oil seal. (e) Explosion relief vent mounted on tank with double diaphragm and equilliser pipe connection to conservator air space (Pressure release device) (f) Air relief plug. (g) Shut off valve between the conservator and buchholz relay. (h) Drain valve with threaded adopter. | ||
| 5 | (j) Filter valve with threaded adopter (Top and bottom). (k) Wheels (l) Rating plate and terminals marking plate. (m) Extra bushing for neutral out side the LV Side (n) Hand hole sufficient size to assess the interior of the tank. (o) First filling of the transformer oil. (p) Cover Lifting eyes. (q) Double float Buchholz relay with trip and alarm contacts. (r) 150mm dial type thermometer for winding temperature indicator having range0-12 centigrade vapor pressure type with maximum reading pointer/Max temperature indicator and resetting device with alarm/trip contact and additional contact for switching on the cooling fan. (s) Dial type thermometer for oil temperature indicator with 02 sets of contacts for alarm and trip having range 0-12 centigrade vapor pressure type with maximum reading pointer/Max temperature indicator and resetting device with alaram/trip contact . (t) Shut off valve between cooling tubes and tank. (u) Pressure Release Valve (PRV) with one set of trip contact. (v) Magnetic Oil gauage (MOLG) with one set of trip contact. (w) Earthing terminal for connecting earthing lead |
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