SPL REPAIR/REPLACEMENT OF STEP DOWN TRANSFORMER AGAINST BER WITH ALLIED WORKS AT NAMS

Amount

Supply,installation,testing & commissioning of highly efficient outdoor type oil immersed naturally cooled (ONAN) type transformer copper wound step down type voltage ratio 11KV/433 volts of capacity 200 KVA plinth mounted as per IS code confirming to IS-1180 (Part-1) : 2014 or latest edition of the IS standard, Level-II with off load tap changer on primary side to vary secondary voltage within limits as per IS tapping range(+) 2.5% to(-) 7.5% in steps of 2.5 % for variation of HV including standard fittings and first filling of transformer oil of dielectric strength not less then 60 KV as per IS 335 of 1980 with cooling system. The transformer shall be provided with cable termination box to terminate outdoor type termination of suitable size on HT side 11 KV & LT outdoor installation and double wound core type with cold rolled grain oriented silicon shell insulated and clamped to minimize vibrations and noise. The winding shall be of copper and shall be designed for full load current and withstand the thermal and electro magnetic stresses arising due to the through fault current vector group shall be DYn 11 including supply of standard fittings/fixtures and comprising of the followings all as specified and directed.

(a) Name, rating and diagram plate (b) Off circuit tap changing switch with locking provision as per OEM standard position (c) Earthing terminals with earthing symbol (d) Lifting lugs (e) Oil level indicator with minimum and maximum level marking (f) Oil drain valve with plug (g) Oil filter valve with plug (h) Conventional Conservator with oil filling hole with cap (j) Thermometer pocket with cap (k) Air release device (l) Silica gel breather (m) Explosion vent (if PRV not opted). (n) Unidirectional Rollers (o) Radiators/Fins and all Epoxy painted (p) Inspection hole

Note :- (i) Transformer shall be installed on transformer plinth. The transformer plinth of size 2.00x2.00 m including steps around shall be constructed/maintenance as per site requirment as directed by Engr-in-Charge.The cost of transformer plinth shall deemed to be included in quoted rate of this item complete all as specified and as directed. (ii) Transformer shall be precommisioned by SEI after installation before issue of completion. (iii) Cost of all necessary T&P and measuring device shall be provided by the contractor without any extra cost. (iv) Testing and certification of transformer must be carried out at an NABL (National Accreditation Board for testing and calibration lab.) acceredited laboratort. All test report such as dielectric strength, insulation resistance and other critical parameters should be issued by lab certified by NABL for ensuring quality and compliance with industary standards.(v) Predispatch inspection from factory shall done by rep of accepting officer deemed to be included. (vi) During currency of dismantling/taking down of existing transformer and commissioning of new transformer load will be shifted to trolley mounted transformer held with establishment, shifting of trolley mounted transformer with HT/LT cable and accessories etc safely carry from MRS/existing Location to required location will be carried out by the contractor and taking down/existing transformer shifting to TOP-II power house or complete all as specified and directed. (vii) Any other item which is required for efficient functioning of transformer deemed to be included in the quoted rate.

All as per Ser Item No 01 above but of Capacity Transformer 315 KVA

All as per Ser Item No 01 above but of Capacity Transformer 400 KVA

All as per Ser Item No 01 above but of Capacity Transformer 500 KVA

Material and labour for earthing complete with galvanized iron or steel plate electrode 600 mm x 600 mm x 6.00 mm thick buried directly in ground vertically in pit of depth not less than 2.25 metre below normal ground level with top edge of the earth plate at a depth not less than 1.5 metre below normal ground level surrounded from all sides with mixture of charcoal and common salt in alternate layers and electrode connected to galvanized iron strip 32 x 6 mm dia as earthing lead by means of GI bolts, nuts, check nuts and washers, earth strip protect0ed by galvanized steel pipe 40 mm bore (light grade) connected to machinery/ equipment all as shown in electrical plate No. 3 of SSR-2010 Part I and including necessary excavation and earth work in any type of soil, 20mm bore light grade GI pipe for watering, funnel, wire mesh, PCC (1:3:6) type C-1 chamber, MS cover of thickness 5mm openable type and having suitable locking arrangement and MS frame of suitable size made of angle iron 50 x 50 x 60 mm, complete all as specified. Note: (i) The unit rate includes earth lead and protection pipe up to maximum 7.5 metre from earth plate to earth point/test point. (ii) Earth pit shall be constructed minimum 0.5 metre away from earth.

Supply and fix in replacement of HT underground cable XLPE insulated PVC bedded, galvanised steel strip armoured electric power cables (heavy duty) with stranded aluminium conductor 11000 volts grade cross sectional area 95 sqmm 3 core, laid in duct / trench/along pole etc including making connection complete all as specified and directed. Note :- Excavation, Returning filling, Removal of excavated material, Sand Cushioning, GI Tubing and and cable covers shall be measured and paid separately.

Excavation in trenches n .exc 1.5 m wide and not exec 1.5 m in depth for foundation etc or for laying pipe lines and cables and getting out as in looses/soft soil complete all as specified and directed.

Returning filling in including spreading leveling, watering and well ramming in layer not exe. 25 cm in soft/ loose soil, complete all as specified and directed.

Removing excavated material to a distance not exc 50m and depositing where directed at a level n.exc 1.5 m above the starting point complete all as specified and directed.

Supply and lay in replacement for un-reinforced precast concrete cable cover factory made, class HV, type I, flat of size 300mm x 180mm x 40mm complete all as specified and directed.

Material and labour for Sand cushioning to underground cable 8cm before laying the cable and 15cm after laying punned down to 18 cm and stretching the cable complete all as specified and directed. Note :- Punned down, thickness shall be used for measurement.

Supply and lay GI steel tubing, 80mm bore, light grade with all fittings, laid in trenches / under roads / along pole / wall etc for protection of Cable / GI wire / GI strip etc complete all as specified and directed.

Supply and fix in replacement of End termination joint heat shrinkable O/D suitable for 3 core 11000 volts (Earthed) grade XLPE UG cable of size 95 Sq mm complete all as specified and directed.

KHAJURIA ENGINEERS (BID ID -3496537)

kailu construction co (BID ID -3496421)

SAINI AND SAINI BUILDERS (BID ID -3496382)

JAY BEE Industries (BID ID -3496369)

Vijaypower Generators Limited (BID ID -3496506)