SPL REPAIR/RENEWAL OF BER DISTRIBUTION TRANSFORMER INSTALLED AT MES POWER HOUSE RONGLI UNDER GE 867 EWS

Amount

Supply, installation, commisioning and testing of Transformer floor mounted capacity 100 KVA ,step down LEVEL-II, outdoor type11/0.433 KV,50Hz, AC double wound core type copper wound ,oil immersed ,air naturally cooled with external cooling tubes, transformer delta connection on HV side and star connection on LV side in accordance with vector symbol DyN-11 and having tapping of + 7.5% in equal step of 2.5 % changed by means of off load tap changing arrangement. The voltage regulation shall be as per IS including first fill of transformer oil as per IS-335 and including all fittings /accessories as specified in SSR Part -I and IS -1180 -2014 with amendment 1,2 & 3 and as per Gazette Notification no CG-DL-E-08042021-226437 dated 08.4.2021 (Amendment No 4 dated Mar 2021 to IS: 1180 -2014) will be compulsory effective after 30.3.2022. The transformer should have cable box on LT side and brass bushing on HT side . The limit of temp rise after continuous full load run as specified in SSR part-I and shall be suitably adjusted to suit the maximum ambient temp prevailing at site all as specified comprising with and including the following specifications:- (i) 01 No Cable box on LT side consisting of 03 Nos porcelain bushing with bushing brass rods and nuts washers and cable glands of suitable for reception of cable LT 1100 Volt grade XLPE insulated heavy duty including gland joint complete. (ii) HV bushing with arching horn on 11 KV side. (iii) Oil Conservator with filter type drain valve and oil level guage.

iv) Dehydrating Breather with first filling of Dehydrating Agent. (v) Explosion Vent. (vi) THERMOMETER Pocket vii) Two Earthing Terminal on tank body to facilitate fixing of 32x6mm GI strips. viii) One No Thermometer Dial Type vapour pressure type having range 0-120 degree centigrade with maximum temprature indicator and re-setting device to maximum temprature including needle of temperature gauge : Max reading painted terminal. ix) Rating plate with terminal marking plate. (x) Oil level guage. (xi) Oil drain filter valve. (xii) Oil filling port on top cover with plug. xiii) Air release valve/plug. (xiv) 4 Nos plain solid cast steel detachable rollers. (xv) Shut off valve between conservator and bucholz relay. (xvi) First fill of tranformer oil conforming to relevent IS and tested upto 60 KV dielectric strength. (xvii) Inspection cover. (xviii) Lifting lugs and jack lifting pad support.(xix) Bi-directional plan / falnged rullers (xx) Explosion vent with double diaphragm and sight glass. (xxi) Silica gel breather or with connecting pipe , first fill of dehydrating agent.

(xxii) Hand hole of sufficient size to assess the interior of the tank. (xxiii) Cover lifting eyes. (xxvi) BLANK (xxv) Oil temp indicator of approved range ,including shutt of valve between conservator and main tank. (xxvi) Winding temp indicator of approved range ,including shutt of valve between conservator and main tank. (xxvii) Drain valve with threaded adaptor. (xxviii) Filter valve with threaded adaptor. (xxix) Sample valve. (xxx) Extra bushing for neutral out side the LV side. Note : (i) The oil temperature and winding temperature gauges shall be housed on a MS box shall be 0.6Mx0.6Mx0.3M with hinged door and having glass 3 mm thick front side of the box and provision for entry of cables and compression glands. (ii)Contractor shall arrange for factory visit for GE/EIC/or his Rep for test as per IS requirement. (iii) Old transformer to be shifted to MES Yard/Store of Rhenock.

M&L for Earthing complete with galvanized steel earth plate electrode 600X600X6 mm buried directly in ground (earth pit not less than 2.25 m deep below ground level) with top edge of the plate not less than 1.5m below ground level, connected to GI earth strip of size 32x6mm, by means of galvanized iron or steel bolts, nuts, check nuts and washers, and conneced to equipments as directed, including funnel with GI med grade watering pipe 20 mm bore, wire mesh charcoal or coke and common salt in alternate layers, of 15 cm compacted thickness all around the earth electrode, with concrete pit in PCC 1:3:6 type C-1 , 50 mm thick pre cast RCC 1:2:4 type B1 cover slab reinforced with 8 mm dia reinforced bar 15 cm C/C and suitable handle of 10 mm dia round bar, 40 mm GI medium grade pipe for earth lead protection including necessary excavation earth work in soft/loose soil and disposal of spoil to a distance n.exc. 50 m and necessary testing complete all as shown on electrical plate No. 3 of MES SSR Part-I including taking out existing earth plate etc., complete all as specified and as directed by Engineer-in-Charge. NOTE: Rate quoted shall be deemed to include for earth lead and protection pipe upto 7.5m.

Supply and laying in trenches, fixed to wall or drawn through pipe etc., XLPE Insulated screened PVC bedded, galvanized steel strip or wire armored, electric power cables (heavy duty) 1100 Volts grade with stranded aluminium conductor of size 70 sqmm 3.5 core and connecting with necessary lugs including taking out exising unserviceable cable complete all as specified and directed.

M&L for 40 mm dia bore GI tubing Light grade, laid under roads/ floor, or fixed to wall or along the pole with suitable size M.S.flat iron clamps, nuts, bolts and washers for cable protection including taking down/out existing pipe complete all as specified and directed.

Supply, installing, testing and commissioning factory made LT feeder pillar box (KIOSK) outdoor type platform mounted, CPRI approved suitable for 415 volts 3 phase 4 wire, 50 Hz AC supply system all as specified and directed having copper bus bar installed on DMC/Epoxy insulators. The panel shall be dust and vermin proof, IP-65 class protection and made of 3.15 mm CRCA steel sheet with double door shutter and locking arrangement, openable from front & back both including powder coated on both outer and inner surfaces for panel. The TPN copper bus bar of rating not less than the 1.5 times the rated capacity of the incommer MCCB including 50 x 50 x 6mm thick angle iron frame workupto height of 0.9mtr above ground level (duly painted with one coat red oxide and one coat of bitumen paint on exposed surfaces) with and including following spares and including dismantling of old unserviceable existing panel all as specified and as directed . (i) MCCB 4 pole 36 kA 160 Amp - 01 No (Incommer) (ii) MCCB 4 pole 16 kA 63 Amp - 03 Nos. (Out going) (iii) MCB TPN 32A - 01 No (Out going) (iv) Phase indicating lamps (R-Y-B) - 01 set (v) Internal wiring with PVC insulated, multi stranded copper conductor cable, 1100 V grade. (vi) Multifunctioning meter with necessary CTs (vii) Spare compartment for MCCB for future expansion - 01 No

Excavation in trenches/ foundation in soft/ loose soil not exc. 1.5 metre wide and n'exc. 1.50m deep for foundation and getting out including forming bottom surface to required level or slope, complete all as specified and directed .

Removing excavated material in soft/ loose soil n'exc 50M and depositing where directed at a level n'exc1.5M above the starting point, complete all as specified and directed.

Returning filling in including spreading, leveling ,and well ramming, in layers not exceeding 25 cm each layer of any kind of soil complete all as specified and directed.

M&L for sand cushioning to U/G cable in layers of 23cm thick( 8 Cm before laying the cable and 15Cm thick after laying the cable) in trenches complete all as specified and directed.

M&L for common burnt bricks, sub class 'B', of size 230 x 115 x 75 mm laid in trenches for cable protection complete all as specified and directed.

Note 1:- (Applicable for all parts/items) : The biidders/contractors are advised to read tender document, all drawings & all corrigendum/ amendments and general condition of contracts before entry/quoting the rates. Note 2:- Attention to bidder is hereby invited to upload revised BOQ if published during their bid submission. Uploading of incorrect/ pre-revised BOQ shall be treated as non bonafide and rejected.

GEETA CONSTRUCTION

SANJAY KAUSHIK

Janata Enterprises

KAMLESH ENTERPRISE

S K ENTERPRISES

Damdoo Bhutia

MS MAYA PRAKASH GOEL AND SONS

SANJAY SAW MILL