REPAIR AND REPLACEMENT OF 3 NOS TRANSFORMERS AT SI LINES BHOPAL UNDER GE BHOPAL

Amount

Taking down existing old unserviceable transformer of any type and size after disconnecting all incoming and outgoing electrical connections without any damage and safely depositing at AGE E/M store yard, SI lines complete all as specified and as directed.

Supplying, installing, connecting, testing & commissioning mineral oil immersed, natural air-cooled, outdoor type, double wound (copper) distribution transformer, three phase, 250 kVA rating, non-sealed type, 50 Hz rated frequency, 11 kV high voltage and 415 V low voltage nominal system voltage, minimum 75 kVp basic insulation level, 11000 V/ 433-250 V no-load voltage ratio, connection (vector) symbol Dyn11, 30⁰ positive phase displacement, off circuit tap changing arrangement for voltage variations of +5% to -10% in steps of 2.5% for variation of HV, minimum energy efficiency level 2 (Star 2 as per the notification issued by the Central Government, in consultation with the Bureau of Energy Efficiency and including all the amendments issued up-to-date), 4.5% impedance, ONAN type cooling all as per IS-1180 (Part 1): 2014 including amendment upto and including amendment No. 4 dated 04 Mar 2021 complete with all fittings, accessories and item as specified and as directed. Note: - The energy efficiency level higher than the minimum energy efficiency level as specified here shall be provided without any extra cost in case the transformer of minimum energy efficiency level is not available.

M & L for earthing complete with copper plate earth electrode 600 mm X 600 mm X 3.15 mm thick, buried directly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not less than 1.5 metres below normal ground level, connected to earthing lead of 20 mm X 3 mm copper strip by means of bolts, nuts, check nuts and washers of galvanised iron from earth plate to test point upto 7.5 metre including all as shown in electrical plate No. 3 of SSR Part I (2009) including necessary concrete chamber in cement concrete M15 (Nominal Mix) using 20 mm nominal size coarse aggregate, precast RCC cover slab in cement concrete M15 (Nominal mix) using 20 mm nominal size coarse aggregate of size 40 cm X 40 cm X 5 cm reinforced with 8 mm dia TMT bars @ 150 mm c/c both ways with one handle for lifting made out of 8 mm dia bar, GI funnel, GI wire mesh filter, 20 mm dia GI pipe medium grade for watering, 40 mm dia GI pipe medium grade for protection of earthing lead, charcoal or coke and salt in alternate layers including necessary excavation and earth work in any type of soil/ strata and testing complete all as specified and as directed by the Engineer-in-charge.

M & L for chemical earthing with earth electrode made of low carbon steel circular rods, molecularly bonded with copper on outer with minimum thickness of 250 micron, 17 mm dia, 3 metre long including drilling of bore hole of 150 mm dia of 20 metre depth, filling the bore hole with black cotton soil up to 17 metres level i.e. below the electrode bottom level, placing electrode by penetrating 150 mm into black cotton soil, filling earth enhancement material (minimum approx. 30 kg) into the augured hole in slurry form and allowed to set, minimum 125 mm dia covering of the composite structure (earth electrode + earth enhancement material), covering remaining portion with backfill soil/ material, welding copper strip of 150 mm X 25 mm X 6 mm to electrode, construction earth pit including testing complete all as specified and as directed.

M & L for earthing complete with galvanised steel plate earth electrode 600 mm X 600 mm X 6 mm thick, buried directly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not less than 1.5 metres below normal ground level, connected to earthing lead of 32 mm X 6 mm galvanised mild steel strip by means of bolts, nuts, check nuts and washers of galvanised iron from earth plate to test point upto 7.5 metre including all as shown in electrical plate No. 3 of SSR Part I (2009) including necessary concrete chamber in cement concrete M15 (Nominal Mix) using 20 mm nominal size coarse aggregate, precast RCC cover slab in cement concrete M15 (Nominal mix) using 20 mm nominal size coarse aggregate of size 40 cm X 40 cm X 5 cm reinforced with 8 mm dia TMT bars @ 150 mm c/c both ways with one handle for lifting made out of 8 mm dia bar, GI funnel, GI wire mesh filter, 20 mm dia GI pipe medium grade for watering, 40 mm dia GI pipe medium grade for protection of earthing lead, charcoal or coke and salt in alternate layers including necessary excavation and earth work in any type of soil/ strata and testing complete all as specified and as directed by the Engineer-in-charge.

S & F 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 20 mm X 3 mm copper strip complete all as specified and as directed.

S & F 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 32 mm X 6 mm galvanised mild steel strip complete all as specified and as directed.

Excavating in trenches not exceeding 1.5 m wide and not exceeding 1.5 m in depth; for foundation, etc. or for shafts, wells, cesspits, manholes, pier holes, etc. or for cable laying or not exceeding 10 sqm on plan and not exceeding 1.5 m in depth and getting out in hard/ dense soil complete all as specified and as directed.

Returning, filling in, including spreading, levelling, watering and well ramming in layers not exceeding 25 cm in soft/ loose/ hard/ dense soil complete all as specified and as directed.

Removing excavated material (soils) not exceeding 50 m and depositing where directed at a level n exc. 1.5 m above the starting point

Supply & spreading in trenches dry river sand cushioning to underground cable in trenches including spreading, levelling, hand punning down complete all as specified and as directed. Note:- Depth of sand cushioning will be measured after punning down and levelling the sand properly.

Supply & laying unreinforced precast concrete cable cover class HV type 1, flat shape, dimension 300 mm X 180 mm X 40 mm as per IS 5820: 1970 complete all as specified and as directed.

M & L for laying of bricks locally available sub class 'B' bricks, non-modular sizes as per IS 1077: 1992 for cable protection cover laid flat and dry in trenches over the cable perpendicular to the direction of cable all as directed.

Supply, laying, jointing, testing and commissioning cross-linked polyethylene (XLPE) insulated cable for working voltages of 1100 V, PVC sheathed, armoured, 3 core with reduced neutral conductors (3½ core), nominal cross sectional area of main conductor 185 sqmm, stranded aluminium conductor, ISI marked as per IS 7098(Part-I): 1988 including cable glands, lugs etc. to suit the cable size and to be laid in trenches, fixed along pole, under floors, through GI pipe laid under floors/roads, through concealed GI pipe along wall etc. complete all as specified and as directed.

Supply, laying and testing cross linked polyethylene (XLPE) insulated, PVC sheathed cables for working voltages 6.35 kV/ 11 kV, three phase, earthed system, 3 core, screened, armoured power cable, 95 sqmm of nominal area of conductor, aluminium conductor, ISI marked as per IS 7098 (Part-II): 2011 laid in trenches or under floors making all connections with necessary glands lugs bushing complete all as specified and as directed.

S & F XLPE cable end termination, heat shrinkable, outdoor type complete with jointing material and accessories suitable for voltage 6.35 kV/ 11 kV (Earthed), 3 core, 50 sqmm to 95 sqmm complete all as specified and as directed.

Supplying & laying in trenches, in road cutting and along pole 100 mm nominal bore, light grade, galvanised coated steel tube conforming to IS 1239 (Part-1): 2004 including all fittings conforming to IS 1239 (Part-2): 2011 complete all as specified and as directed.

Supplying, installing, testing and commissioning factory made, CPRI approved, outdoor type, floor mounting LT panel board of adequate size, made of cold rolled close annealed sheet of 3 mm thick with 50 mm X 50 mm X 6 mm angle iron frame works, powder coated, dust & vermin proof, front and rear openable, double doors, compartmentalized, Form 4b construction, conforming to IS/IEC 61439 (Part 0 to 7), locking arrangements, suitable for 3 phase 4 wire 415 V, 50 Hz with 600 Amps rated aluminium busbar fully insulated with class F materials and nuts, bolts, washers for connection including wiring with single core PVC power cable of suitable size and including mounting on angle iron frame made using angle iron 50 mm X 50 mm X 6 mm complete all as specified and as directed and shall be comprising the followings: - (A) 600 Amps rated aluminium busbar fully insulated with class F materials and nuts, bolts, washers for connection – 4 Nos (B) Wiring with single core PVC, copper power cable of suitable size (C) Incoming: (a) MCCB rated current (In): 400 A, Icu: 36 kA, Ics: 100% of Icu, Uimp: 8 kV, Ui: 690 V, IP40, fixed thermal and fixed magnetic setting, four pole, for 415 V, 50 Hz AC supply -1 No (D) Outgoing: (a) MCCB rated current (In): 250 A, Icu: 25 kA, Ics: 100% of Icu, Uimp: 8 kV, Ui: 690 V, IP40, fixed thermal and fixed magnetic setting, four pole, for 415 V, 50 Hz AC supply -1 No (b) MCCB rated current (In): 200 A, Icu: 25 kA, Ics: 100% of Icu, Uimp: 8 kV, Ui: 690 V, IP40, fixed thermal and fixed magnetic setting, four pole, for 415 V, 50 Hz AC supply -1 No (c) MCCB rated current (In): 125 A, Icu: 16 kA, Ics: 100% of Icu, Uimp: 8 kV, Ui: 690 V, IP40, fixed thermal and fixed magnetic setting, four pole, for 415 V, 50 Hz AC supply -1 No (d) MCCB rated current (In): 63 A, Icu: 10 kA, Ics: 100% of Icu, Uimp: 8 kV, Ui: 690 V, IP40, fixed thermal and fixed magnetic setting, four pole, for 415 V, 50 Hz AC supply -1 No (e) Digital ammeter (0 to 600 Amps) flush pattern type square dial with suitable CTs – 1 No (f) Digital voltmeter (0 to 500 V) flush pattern type square dial – 1 No (E) Display meter for VAF measurement (F) PCC platform of height 750 mm (450 mm above and 300 mm below ground level) constructed with M10 (Nominal Mix) concrete using 20 mm nominal size crushed stone aggregate shall be provided for placing LT Panel Board. The length and breadth of foundation shall be 300 mm more on all sides than the size of the panel. The panel shall be fixed with platform using adequate size and numbers of anchor bolts grouted PCC platform.

Construction of platform for transformer having dimension (2900 mm X 3050 mm), height 1250 mm and foundation depth of 1200 mm including necessary earthworks in any type of soil, 150 mm moorum filling in foundation, 150 mm PCC foundation with M7.5(Nominal Mix) using 40 mm nominal size graded crushed stone aggregate, brick work with sub class 'B' bricks, non-modular sizes as per IS 1077: 1992, straight or curved on plan exceeding 6 m mean radius built in cement mortar 1:6, cement plaster 20 mm thick externally in two coats of (15 mm and 5 mm) in cement mortar 1:4, enclosed spaces filled with moorum, 75 mm PCC subbase of flooring with M7.5(Nominal Mix) using 40 mm nominal size graded crushed stone aggregate, 150 mm PCC flooring with M10(Nominal Mix) using 20 mm nominal size graded crushed stone aggregate, finishing exposed faces of concrete surfaces and plaster surfaces with three coats of white wash and all as per drawing No. CEBZ/TD/90/2011 Sheet No 1/1 of HQ CE Bhopal Zone complete all as specified and as directed.

GEPS PROJECTS

M/S RAKESH TRADERS

PRADEEP TIWARI CONTRACTOR