PROVN OF STANDBY TRANSFORMER CAPACITY 315 KVA AT AF STN SONEGAON

Amount

Supply,installation,testing & commissioning Outdoor type Transformer step down of capacity 315 KVA, 11/0.433 KV (at no Load) Level 3, AC 3Phase ,50Hz core type Copper wound, oil immersed ,naturally cooled ,oil natural ,Air natural(On/AN) with external cooling tubes/Fins delta connection on primery side(HV) and star connection on secondary side (LV) in accordance with vector group DYN-II with Neutral broughtout on secondary side (LV side) and having tapings at 7 Nos on HV side to be changed by means of hand operated OFF load tap changer gear with locking arrengment. The maximum temprature rise should not exceeded 40degree celeius in oil and 45degree celsius in HV/LV winding when measured by resistance method after continuous full load run on an ambient temprature of 40 degree celsius as per IS 1180 (revised).Transformer shall comprises of the following:-

(a) HT side (primary side) consisting of three Nos porcelain bushing with brass rods complete with nut & washers HT bushing suitable for outdoor mounting transformer 11000 volts grade. (b) One cable box LT side (secondary side Consisting of four Nos porcelain in bushing complete with nut & washers with one No cable gland suitable for reception LT 1100 Volts grade XLPE insulated heavy duty amounted cable of suitable size complete. (c ) Oil conservator with filter type drain valve and oil level gauge complete. (d) De-hydrating breather with first fill of dehydrating agent (silica gel) (e) Explosive vent & thermometer pocket on tank cover oil level gauge ,Oil level gauge ,oil drain filter valve lifting lugs oil filling hold with cap/plug with connection plate complete Air release valve plug and four Nos solid cast steel detachable rollers.

(f) One 100MM dia ,dial type thermometer ,vapour pressure type having range 0-120 degree celsius with metal guard having maximum perimeter temprature reading indicator with re-setting device. (g) Two earthing terminals on tank cover to facilitate fixing of 50x6MM earth strip for earthing of neutral & two for body. (h) Rating plate and terminal making plate. (j) Extra bushing for Neutral in the LT cable box providing independent set of earthing for neutral. (k) First filling of new & unused transformer oil as per IS-335 marked filtered and tested upto 55KV dielectric strength at 2.5MM air gap between testing electrode. (l) The factory inspection is to be carried out by inspecting officer detailed by accepting officer.

Excavation in trenches not exc 1.5 metre wide and not exc 1.5 metre in depth and getting out in any type of soil for laying of cable, pipes etc. all as specified and directed.

Returning, filling in and including spreading, levelling, watering and well ramming in layers not exceeding 25 cm thick all as specified and as directed.

Removal of excavated materials to a distance not exceeding 50 mtrs and depositing where directed at a level not exceeding 1.5 mtr above the starting point all as specified and directed.

M & L for fine dry sand cushioning to under ground electric cable 8cm before laying of cable and 15 cm after laying of cable and slightly punned down to 18cm complete all as directed. Note : Punned thickness of 18 cm shall be considered for payment purpose.

Supplying & laying Bricks common burnt clay old size bricks (23cm x 11.5cm x 0.075cm) sub class B designation 75.

Supplying and laying GI pipe Light grade (ISI marked) 100mm bore with connecting accessories, laid under road/ drain/fixed on wall etc for protection of cables complete all as specified and directed

Supply, lay, jointing, testing and connecting of XPLE insulated LT under ground cable, 1100 volts grade heavy duty, armoured with multi stranded aluminium conductor laid in trenches/ ducts, in pipes or on poles etc complete all as specified and as directed for the size 185 Sqmm 3.5 core.

Supply, laying, testing and connecting of HT Cable XLPE insulated, screened PVC bedded, galvanized steel strip or wire armoured electric power cables (heavy duty) with aluminum Conductor, 11000 volts grade ( Earthed), cross sectional area of size 95 Sqmm 3 Core.

S & F cable jointing kit for 11 KV (Earthed) grade cable for Outdoor termination heat shrink type joint complete with jointing material & accessories suitable for 3 Core XLPE armoured aluminium conductor cable of size 95 Sqmm 3 Core complete all as directed.

Earthing complete with galvanized steel earth plate electrode 60 cm x 60cmx6 mm thick, buried directly in ground vertically (earth pit not less than 2.25 m deep below ground level) with top edge of the earth plate not less than 1.5m below ground level , connected to GI strips of size 32 x 6 mm as earthling lead by means bolts and nuts check nuts and washers of galvanized iron and connected to main switch board including watering arrangement with PCC chamber , MS funnel, wire mesh. CI cover with frame etc including necessary excavation in any type of strata , returning, filling removal of soil outside MD land ,filling of charcoal and salt complete all as shown in electrical plate No. 3 of MES Sch Part I , connected to Earthing test point all as specified and directed on testing on completion.

M & L for Earth continuity conductor with galvonised iron strip 32 x 6mm 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. all as directed.

Mareial and labour for transformer platform of size 2.5m x 2.5m x 1.5m height above GL comprising of PCC M-7.5 grade( nominal mix) using 40 mm graded crushed stone aggregate as in foundation brick work of one brick thick using old size brick in cement motar 1:6, rendering 15 mm thick in cement mortar 1:4 on all exposed brick surface finished smooth extra cement, filling in approved earth, proividing 150mm thick slab M-25 grade(nominal mix) on top reinforced with 12 mm dia TMT bars spacing between 15cm c/c both ways including 02 Nos ICMC 100 x 2.5mtr on top surface, finishing top surface with 15 mm thick plastering in cement mortar 1:4 finished even and smooth using extra cement, including three coats white washing of transformer plinth and suitable steps to reach the platform to be provided, complete all as specified and directed. Note;- excavation and earth work and PCC shall be included in quoted rate.

Supply, installation, testing & commissioning of HT 11 KV 3 phase 50 cycles totally enclosed metal clad SF6 switchgear outdoor type having rupturing capacity upto 250 MVA, overload and eart protection, ammeter, voltmeter, and rating upto 400 amp. The unit shall include the following with all necessary standard fitting required at site.

(a) 400 amps Load Break Switch module for making of fault current alongwith Earth Switch of full making capacity- 2 No. (i) Short time withstand current - 21KA/ 3 sec (ii) Making Capacity - 52.5kAp (iii) Auxiliary contacts - 1NO + 1NC (iv) Power frequency withstand voltage - 28KV (v) Impulse withstand voltage - 75KV (vi) Nominal operating gas pressure - 1.4 Bar abs. (vii) Front cover mechanism - IP2X (viii) Cable covers - IP54 (ix) Snap action mechanism for manual operation (x) Cable box for front/side/rear cable termination of the cable suitable up to 3 core 95 Sqmm, (xi) Right angle Boots - 1 Set (R,Y,B). (b) 400 amps VCB module for making & breaking of fault current alongwith Earth Switch of full making capacity- 1 Nos. (i) 400 amps Vacuum circuit breaker having spring stored & trip free mechanism with integrated Spring charging handle.

(ii) Three position disconnector/earthing switch downstream vacuum circuit-breaker. (iii) Three position single spring mechanism for disconnector/earthing switch (iv) “Live Cable” LED Indicators thru Capacitor Voltage Dividers mounted on the bushings. (v) Short time breaking current - 21KA/ 3 sec (vi) Making Capacity - 52.5kAp (vii) Auxiliary contacts - 1NO + 1NC (viii) Power frequency withstand voltage - 28KV (ix) Impulse withstand voltage - 75KV (x) Nominal operating gas pressure - 1.4 Bar abs. (xi) Enclosure Protection - IP54 (xii) Green(ON)/Red(OFF) push buttons to operate VCB. (xiii) 3O/C + 1E/F self powered numerical protection relay with Low and High set for Over current and Earth Fault. (xiv) Electromechanical type TCS relay (95) (xv) Electromechanical type Master trip relay (86) (xvi) Static type UV Relay with Timer (27+2) (xvii) Resin cast ring core protection CT plate mounted type : 100/1 A, 5P10, 2.5 VA - 3 Nos (xviii) Resin cast potential transformer PT : 11/0.11KV class 0.5 3P - 3 Nos. (xix) Mechanical ON/OFF/EARTH/Spring charge Indication (xx) Right angle Non-touch proof boots - 1 Set (R,Y,B). (xxi) The factory inspection is to be carried out by inspecting officer detailed by accepting officer.

Supply, Install, Testing and Commissioning CPRI type tested, factory made, totally enclosed, IP 65 dust, weather and vermin proof, LT Panel Outdoor type KIOSK for 415V, 3 phase 4 wire, 50 Hz AC system made out of CRCA steel sheet 3.15 mm th with TPN tinned copper bus bar of rating 1.5 times that of controlling MCCB/ACB supported on F class DMC/FRP insulator with short circuit withstand capacity 21 MVA for 1 second, neutral bus bar of capacity of that of phase bus bar , general construction confirming to IS-8623/93, having bottom base channel of MS section not less than 75mm x 75 mm x 6 mm, entire panel having common aluminium earth bar of size 25mm x 5mm at the rear with 2 Nos earth stud, solid connection from main bus bar to switchgears with required size ( minimum 1.5 Sqmm) PVC insulated copper conductor cable , cable alleys, cable gland plates in two half including LED indicating lamp for all phases and , mounted on suitable PCC foundation for the complete panel base with following accessories:-

(a) INCOMING :- (i) MCCB, 4 Pole, 630 amps microprocessor based Ics=100%Icu, 50 KA with copper extension link. Qty- 2 nos. (ii) Copper bus bar of rating 1.5 times of Main incommer. (iii) Supply and fix ON LOAD Change over switch open execution mounted inside the the LT panel 415 V in 4 pole of capacity 630 Amps - 01 Nos. (iv) Digital panel meter for Amp, Volt, KWH, power factor and other parameter flush mounting of size 96 x96 mm - 01 Nos. (v) LED indicating lamps for RYB- set of 03. (b) OUTGOING :- (i) ACB 4 pole 415 volt with Thermal magnetic release (Manual Drawout type) of capacity 630 amps - 01 Nos

SONA LAKSHMI ASSOCIATE (BID ID -3462548)

MONA GENERATOR SEVICES PVT. LTD. (BID ID -3463643)

M/S MECHANICAL ENGINEERING and ELECTRICAL CONTRACTORS (BID ID -3463662)