SPECIAL REPAIR TO TRANSFORMER AND CONNECTED WORKS AND SPECIAL REPAIR TO 11 KVA HT CABLES FROM DOMESTIC TO TECH SITE II AT AF STN KANHERI HILLS UNDER GE AF THANE

Amount

Supply, install, testing and commissioning of Indoor transformer as per IS : 1180 part - I, EEL-2 step down, copper Cu 99.9% purity, electrolytic grade wound 22KV/433 Volts (at no load) AC 3 phase 50 Hz 400 KVA capacity, core type, oil immersed naturally air cooled, oil natural air natural (ON/AN) , with external cooling tubes, delta connected on primary side (HV) and star connected on secondary side (LV) in accordance with vector group DYn-11 with neutral brought out on secondry side (LV) and having taping at +5% to -10% in steps of 2.5% on HV side to be changed by means of hand operated off load tap changer gear. The maximum temperature rise should not exceed 50 degree celsius in oil and 55 degree celsius in HV/LV winding when measured by resistance method after continuous full load run on an ambient temp of 40 degree celsius transformer shall be of BOLTLESS core design. Transformer shall be double wound, core type with low loss, non ageing, high permeability CRGO prime core grade M-OH / ZDKH /TCH grade, perfectly insulated and clamped to minimize noise and vibrations. The transformer shall be IS/IEC 60076 and as per IS-1180 part - I of 2014 marked. Flux Density at rated voltage and rated frequency should be 1.688 T the transformer shall be designed as per CBIP manual 317 for over-fluxing witstand capacity of 110% continuous, 125% for 1 minute and 140% for 5 seconds. and over loading capacity of transformer shall be as per 6600 , Noise level as per NEMA TR1, with class A insulation, Tank pressure, Vaccum witstand capability & minimum clearances as per CBIP manual, No Load Current within 1% to 2% of Full load current Tranformer losses shall not exceed the loses mentioned in Table 6 of IS: 1180 of 2014 Part - I with Energy Effeciency Level - 2 and shall comprise of the following accessories :-

(a) One cable box on HT side (Primary side) consisting of three nos porcelain bushing with copper rods, complete with nuts and washer , with cable glands suitable for reception/taking out 3 core 95 Sqmm, HT 22000 volts grade, XLPE insulated and PVC sheathed, heavy duty , armoured cables including jointing materials complete. (b) One cable box on LT side(secondary side) consisting of four nos porcelain bushing with copper rods, complete with nuts and washers, with cable glands suitable for reception/taking out single core /3.5 core of rated size/ runs of secondary currents, LT 1100 volts grade, PVC/XLPE insulated and PVC sheathed, heavy duty, armoured cables including jointing materials complete. with Bi metallic flexible connectors and copper bus bars of rated capacity with insulators support to be provided (c) Conservator with filter type drain valve and oil level guage. (d) De-hydrating breather with first fill of dehydrating agent (Silica Gel). (e) Explosive vent, Thermometer pocket on tank cover, oil level guage, Oil drain filter valve, Jacking / Lifting lugs, Marshalling Box,IP 55, with oil filling hole with cap/plug with connection plate complete, Air release valve plug and four nos plain solid cast steel detachable rollers. (f) One no 100 mm dia, dial type thermometer, vapour pressure type, having range 0-120 degree celsius with metal guard having maximum perimeter temperature reading indicator with re-setting device. (g) Two earthing terminals on tank cover to facilitate fixing of 50x6mm galvanised iron earth strip for earthing of body. (h) Rating plate and terminal marking plate. (j) Extra bushing for neutral in the LT cable box for providing independent set of earthing for neutral.

(k) First fill of new and unused transformer oil, IS-335 of 1986 marked, filtered and tested upto 50 KV dielectric strength at 2.5 mm air gap between testing electrodes, specific resistance at 27 Degree celsius Ohm-om 500 x 10 the power12, water content 50 PPM, Dielectric dissipation factor (tan Deta at 90 degree celsius) 0.005, Neutralisation value mg of KOH/gm of oil 0.03, Inter facial tension N/M at 27 Degree celsius - 0.04, flash point 140 Degree celsius and sluge 0.1 % by weight. (l) Detachable Rollers of adequate load capacity and and nos of channels, embeded in floor, for movement of transformer. (m) Top and Bottom Filter cum drain Valves with Dummy (n) 6" Oil temperator indicator and winding temperature indicator with alarm and Trip contacts Note For Item No 104 (a)The OEM should Have in house NABL accredited lab for testing and no outsourcing for testing is accepted. (b) Manufacturer /OEM must have type test / short circuit reports for each & every rating from CPRI / NABL accredited Lab (c) Core shall be procured from one of these manufacturers – Posco/Nippon/NLMK/AK Steels or NOVEX Trader CRGO and CRGO core grade used should be M-OH / ZDKH / TCH only other low grade core (M4,M5 and M6) are not allowed and Procurement, Mill's Test Cerfificate / Invoice from supplier /Bill of landing Bill of entry certificate by CUSTOMS shall be provided. (d) CPRI Short circuit test report for exactly similar transformer (matching all major electrical parameters including Loss Figure) shall not be older than 5 years to be furnished)

(e) OEM should be BIS and BEE certified for all the ratings of the transformer that are to be submitted. (f) Rate quoted includes the cost of making and Testing of controll wiring connection at the Transformer and RMU/VCB for the Temperature alarm/Trip, Gas alarm/Trip. And the Controll cable shall be measured and paid seperatly under relevent item (g) Expenses / cost for FAT and necessary Travel / freight / conveyance / stay expenses for inspecting/ testing officers as nominated by the accepting Officer for FAT shall be included in the rate quoted. Tender/ contractor shall submit all the necessary certificates as mentioned in above note (a) to (e) from the OEM of transformer during Technical Bid for evalution. And fauilure of submission/ Upload of the certificates during T bid shall be Non Bonafide.

Material and labour in repairs for earthing complete with copper earth plate electrode 600mmX 600mmX 3.15 mm thick buried directly in ground vertically ( earth pit not less than 2.25 metres deep below ground level) with top edge of plate not less than 1.5 metres below ground level, connected to and including copper strip of size 20 X 3 mm from earth electrode to test point or up-to 7.5mtr whichever is less by means of GI bolts, nuts, check nuts and washers all as per electrical plate no 3 of SSR Part-I provision of G I Pipe 40mm bore eight grade for protection of GI strip and GI watering pipe of 20 mm bore medium grade,GI funnel with wire mesh,including char-coal, salt packed all around the earth electrode plate in layers,PCC earth pit chamber 1:3:6 type C1,RCC cover 1:2:4 type B1,excavation,earth work in any strata and returning filling, removal of surplus soil and testing for required value complete all as specified and directed.

Taking up Old unserviceable HT underground cable of any type from the ground, wall, floor etc after disconnecting of any size including cable cover complete all as specified and as directed.

Supply,laying, testing and commissioning XLPE insulated, screened, PVC bedded, galvanized strip or armored power cables (heavy duty) with stranded aluminium conductor ,11000 Volts grade underground cable of size 3 core, 120 Sq mm complete all as specified and as directed

Supply and fix cable jointing kit for 11 KV (Earthed) grade cable for straight through heat shrinkable type suitable for underground XLPE cable size 3 core 120 Sqmm 11 KV HT cable all as specified and directed .

Supply and fix GI pipe 100 mm dia light grade complete with all fitting for supporting cable on four pole structure complete all as specified and directed.

M&L for PCC 1:4:8 type D-2 using 40 mm graded stone aggregates for fixing cable protection pipes at Nalls all as specified and directed by Engineer-in-Charge.

Supply and cross arm, bracing, supports, clamps and back plate fabricated from structural steel section including nuts, bolts, washers,welding, bending, drillingholes for bolts in any shape and any size inclusive of one primer coat, two coats of aluminium paints as indicateed complete all as specified and as directed by Engineer in charge

M&L cable path indicator made with PCC block of size 45x60x10 cm with 1:2:4 using 20mm graded stone aggregates pre cast using 6mm 20cm concrete and grounded in ground, embedded loop/joint on the block in words complete all as specified and directed by Engr-in-Charge.

M & L for Excavation in trenches not exc 1.5 m in depth and not exc 1.5 m wide for taking out/laying cable and getting out in Hard rock complete all specified/directed

M & L for Excavation in trenches not exc 1.5 m in depth and not exc 1.5 m wide for taking out/laying cable and getting out in Hard/dense soil complete all specified/directed

Removing excavation soil at a distance not exc 50 m and deposited where diverted complete all as directed

Returning, filling in including spreading, leveling, watering and well rumming in layers not exc 25 cm complete all as directed

Sand cushioning for cable protection by spreading in trenches crushed stone sand by gently punning down manually. Note:- Punnned thickness shall only be measured and paid.

Supply and laying un reinforced precast concrete cable cover class EHV, type-I, flat size 300 mm x 180 mm x 40 mm laid in trenches.

Relaying reinforced precast concrete cable cover of any type complete all as specifed and directed by Engineer-in-Charge. Note : The PCC Cover removed during removal of cables be used based on serviceablity state

S&F cable jointing kit for 11 KV (earthed) grade cable for indoor termination heat shrink type joint complete with and including jointing material and accessories suitable for 3 core XLPE armoured aluminium cable of size 120 Sqmm, also including connecting with single thimbles etc after disconnecting of electric supply including removing burnt out jointing kit etc, complete all as specified and directed.

DARSHAN CONSTRUCTION Co. (BID ID -3237404)

Sagar Electricals (BID ID -3237410)

AGRAWAL ASSOCIATES (BID ID -3237161)