Military Engineer Services-MES has published Upgradation / Replacement Of Existing Transformer For Ascon Node Tenga Under Ge 859 Ews.. Submission Date for this Tender is 21-10-2022. Transformer Supply Tenders in tenga Arunachal Pradesh. Bidders can get complete Tender details and download the document.
| Sl. No. | Item Description |
| 1 | Supply, installation, commissioning and testing complete with all accessories of transformer of 33 KV capacity 200 KVA step down, outdoor floor mounted, double copper wound,3 Phase, 50 Hz, AC,Oilimmersed, ONAF confirming to IS-2026 and IEC62770 includingexternal cooling tubes/radiator cores type havingvoltage ratio 33000/433 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 byTap Changer. 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 ofcore 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 :- Make :- Voltamp limited / Urja Techniques India PVT Ltd/Indian Transformers Electricals (a)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) IS-2099 for Bushing >1000V. (iv) IS-7421 for Bushing <1000 V (v) IS-1271 for Electrical insulation classified by Thermal stability. |
| 2 | Item No. 01 Contd..... (b) Winding (i) HV Winding -Layer/disc winding (ii) LV Winding-Helical/Disc widing (c) Insulation Level (i) HV-170 (ii) LV-70 (d)Insulation level (Power frequency with Stand KVrms) (i) HV-70 (ii) LV-28 (e) Tapping Range -(+)5% to (-) 15% @1.25% (f)Temperature Rise (Oil/Winding) -50/55 Degree Centigrade (g)Termination HV/LV-Cable Box (h) egulation at full load 0.8 PF%.-5.75 (i) Termination HV/LV-Cable Box The transformer should have following fitting and accessories :- (a)Outdoor 33 KV bushing insulator for connection through openconductor with sleeves. (b)Terminal box for secondary side connecting. (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) |
| 3 | Item No. Contd..... (f)Air relief plug. (h) Drain valve with threaded adopter. (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)Dial type thermometer for winding temperature indicator having range0-12 centigrade vapor pressure type with maximum reading pointer/Max temperature indicator and resetting devicewith alarm/trip contact and additional contact for switching on the cooling fan. (s)Earthing terminal for connecting earthing lead |
| 4 | M&L for earthingcomplete with galvanised steel earth plate electrode 60x60cmx6 mm thick burried directly in ground ( earth pit not less than 2.25 Mtr deep below ground level ) with top edge of the plate not less than 1.5 Mtr below normal ground level, connected to galvanised iron strip 32x6 mm as earthing lead by means of bolts, nuts, check nuts and washers of GI or steel all as shown in electrical plate No. 3 of SSR Part-I 2009 connected to earthing test point/transformer/panel all as specified or indicated and testing on completion as directed by the Engineer-in-Charge including necessary excavation & earth work in any type of soil, funnel, PCC chamber ( 1 : 3 : 6) type C1, RCC pit cover , charcol, salt including provision of earth lead protected by 32 mm dia light grade GI pipe and 20 mm dia medium grade GI Pipe for watering complete. |
| 5 | Supply and install HT 33 KV outdoor gang operated air-break switch suitable for horizontal or vertical mounting with drop out fuse having 12 insulators of rating upto 200 Amps including taking down old GOD complete all as specified and direected by Engr in Charge.. Make : Jaipuria/Alston/Pactil |
| 6 | Supply and fix Lightning arresters high tension expulsion type complete with all fittings, transmission class,suitable 33kv, discharge capacity 65 kilo amp including taking down of old unsv lightening arrester complete all as specified and directed.. |
| 7 | Supply and Fix change over switch 200 Amp 415V, 50 HZ complete all as specified and directed by Engr in Charge. |
| 8 | Supply and laying XLPE insulated armouredheavy duty electric cable with aluminium conductor, 1100 volts grade, cross sectional area 120 sqmm 3.5 core laying in the trenches including taking down of unsv cable complete all as specifiedand directed by Engr in Charge. |
| 9 | Excavation in trenches n.exc 1.5 mtr wide and n.exc 1.5 mtr in depth and getting out in hard / dense soil for laying of cable / errection of poles / stay assembly etc complete all as specified anddirected. |
| 10 | Returning filling in trenches including spreading, leveling, watering and well ramming in layers n . Exc 25 cm complete all as specified and directed. |
| 11 | Removing surplus soil to a distance n.exc 50 mtr and depositing where directed at a level n.exc 1.5 mtr above the starting point complete all as specified and directed. |
| 12 | Supply and spreading clean dry river sand in trenches for cushioning of UG cables complete all as specified and directed. |
| 13 | Supply and laying in replacement un-reinforced precast concerete cable cover, class LV, type 3 flat size 450mm x180mm x 40mm for cable protection complete all as specified and directed. |
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