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| 1 | Supply, installation, testing and commissioning ofEnergy Efficient Power Transformer, platformmounted, 33 KV on primary side and 11 KV on Secondary side, capacity 3150 KVA, step down, outdoor type, 50 Hz, AC,double wound core type copper wound,oil immersed,naturally cooled (ONAN) type, with external cooling tubes/fins, winding shall be made with 99.9% pure electrolytic grade copper as per IEC 60076, transformer delta connection on primary side (33KV) and star connection on secondary side (11 KV) in accordance with vector symbol DYn-11 and having taping at of +5.0 %to -15% in equal steps of2.5% changed by means of On load load tap changing arrangement. The voltage regulation shall be as per IS. Transformer oil shall be as per IS 335:1993. The limit of temperature rise after continuous full load run as specified inIS 2026, shall be suitable adjusted to suit the maximum ambient temperature prevailing at site (Dahung). Particular specifications shall be referred for detailed specifications. The transformer shall be completed with following fittings and accessories:- (a) Cable boxes on 11 KV secondary side with bare bushing. (b) HV bare bushing on 33 KV side. (c) Oil conservator with oil filling hole, cap,drain valve and oil level gauge. (d) Dehydrating silica gel breather with connecting pipe along with first fill of dehydrating agent and oil seal. (e) Explosion relief vent mounted on tank with double diaphragm and equalizer pipe connection to conservator air space (pressure release device). (f) Air release plug. (g) Shutoff valve between the conservator and bucholz relay. (h) Drain valve with threaded adapter. (j)Filter valve with threaded adapter (Top and bottom). (k) Thermometer pocket alongwith thermometer. (l)Inspection cover. (m) Jacking pads, handling and lifting lugs. (n) Bi-directional Rollers type four Nos. Wheels. (o)Rating plate and terminal marking plate. (p)Extra bushing for neutral brought outside the secondary side for neutral earthing. (q)Hand hole of sufficient size to assess the interior of the tank. (r) First filling of transformer oil. (s)Cover lifting eyes. (t) Double float Bucholz relay with trip and alarm contacts. (u) Pressure release valve with one set of trip contact. (v) Magnetic oil level gauge with LLA. (w)Marshalling box containing Oil temperature indicator and winding temperature indicator. (x)Earthing Pads, Monogram plate. (y)150 mm dial type thermometer for oil temperature indicator having range 0-120 degree centigrade vapour pressure type with maximum reading pointer/Max temperature indicator and resetting device with alarm/trip contact and additional contacts for switching on or the cooling fan. (z) Winding temperature indicator 150 mm dia with 2 Sets of contacts alarm + trip. (za) Shut off valve between cooling tubes and tank. (zb)Dial type WTI with A/T contacts. (zc) Dial type OTI with A/T contacts. (zd)Necessary control cables and all other required accessories to connect, Buchholz Relay, WTI, OTI and any othertrip coils with indoor control Panel of 33 KV VCB. (ze) On load tap changer with RTCC and AVR. (zf)The oil temperature and winding temperature gauges shall be housed on a MS boxand size 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. (zg)Platform constructed with PCC/Brick Work and finished with cement plaster in C:M 1:4 all as per manufacturer\"s recommendations including working space all around as per IE Rules-1958. Make of Transformer : VOLTAMP (Vadodara) / Schneider / Alstom / Seimens / ABB LTD / Crompton Greaves. Note No. 1: Contractor shall arrange for factory visit forRep of Accepting Officerto check Routine tests as Per IS: 2026 and including the following:-Note No. 2.The cost etc for testing of transformer shall be deemed to be included in the quoted rate.Note No. 3. Maximum losses of transformer shall not exceedvalues as that for at least three star rating transformer specified by Bureau of Energy Efficiency (BEE). I.e Maximum allowable losses at 50 % of full load shallbe 0.70 % and Maximum allowable lossesat full load shall be 0.98%. The altitude of 1600 mtrs from sea level to be considered in design of transfomer Note No. 4. The transformer shall be energy efficient type with core made up of high grade Cold Rolled Grain Oriented (CRGO) sheets. Scrap CRGO material shall not be used for manufacturing of transformer.Note No 5. Prior to manufacture, the contractor will submit drawing and design details of transformer for approval of GE.Note No 6. After installation of transformer at site, the pre-commissioning test shall be carried out by SEI/EI/Rep of Accepting Officer and cost deemed to be included in the quoted rates. |
| 2 | Supply, installation, testing & commissioningHT 33 KV, SF6 circuit breaker 630 Amps, Minimum 21 KA ( 1 Sec) rupturing capacity 350 MVA outdoor type of having motorized mechanism with indoor control and relay panel SCADA Compatible, including control cables , lightning impulse withstand voltage (KVpeak)-170, Power frequency withstand voltage (dry) (KV rms)-70 withthe following:- Make : ABB/ AREVA /Schneider Electric/Siemens(a)The circuit breaker and earthing switches shall be lockable in the open or, closed position by suitable number of padlocks of suitable size.(b)Motorized spring charging mechanism with 110 Volt DC universal motor 200 watt ,charging time less than 15 second.(c)SF6 circuit breaker unit shall also comprising the following (i)Electrically charged and electrically operated independent closing /tripping ,trip free ,operating mechanism including manual closing/ tripping push button and breaker closed/open, spring charge/discharge indication. (ii) Mechanical operation counter - 01 No(iii) Electrical closing coil operated on 110 voltsDC supply - 01 No(iv) Shunt tripping coil operated on 110 voltsDC supply - 01 No(d)Self powered solid state Numerical O/C & E/F relay for complete protection of HT, 33 KV, three phase feeder having facility to record fault current with date & time with suitable communicable port.Make : AREVA - MICOM Series modle- MIOM P-127 /Equivalent of ABB.(e) Master Trip Relay duly connected with all other relays, including Bucholz , WTI, OTI and any other Trip Relay provided in Transformer. (f) Digital intelligent panel meter indicating line current, line voltage, power factor, KVAR, KVA, frequency, voltage and current harmonics etc. with accuracy 1.0 for active energy. Make : QUASAR of L&T.(g)One set of indication lamp (LED) type for ON/OFF indication(h)One set of indication lamp (LED) type for spring charging and three Nos. indication lamp RYB phase indicationNote:(a) Contractor shall arrange for factory visit of rep of accepting officer to carry out Routine &Type Test ( Non destructive)Note (b). The labour & material including transportation cost for installation and modification of existing floor/foundation /cable ductif requiredat site shall be deemed to be included in rate quoted above.Note(c)The SF6 breaker shall conform to all relevant IEC standards and IS standards.Note (d) Any item missed out above but is technically required for safe and proper operation of equipment shall be deemed to be included in the quoted rate. |
| 3 | Supply and erecting of a single piece non linear resistor type lightening arrestor gapless metal oxide (ZnO)suitable for 3 wire 33 KV overhead lines with rated voltage of 30 KV (rms) 10 KA discharge current with surge monitor witha (station class) with facility to record number of surge and complete with galvanized clamping arrangements clamp, bolt, nuts washers etc as required. Make: ABB/AREVA/OBLUM/Crompton Greaves |
| 4 | Supply and install HT 33 KV , 3-Phase outdoor gang opearted air break switch (Isolator), ISI Marked, CPRI tested, factory assembled, mechanically operated , mounted on insulators and steel frame , Horizontalmounting fixed type complete with Earthed Switch with post insulators, Rated Voltage-33 KV, Highest System Voltage-36 KV, Rated Continuous current-200 Amps, No of Ploes-3 Nos., Rated frequency-50Hz, Power frequency withstand voltage across the isolating distance-80 KVrms, Power frequency withstand voltage to Earth-70KVrms, Lightning Voltage withstand test across isolating distance-170KV Peak, Lightning voltage withstand test across phase to earth-195 KVpeak,complete all as specified. |
| 5 | Supply installation testing and commissioning of single phaseoil type outdoor typedual core dual ratio current transformer for main incomer as well as transformer protection suitable for 33 KV , Single Phase, 50 HZ and 15 VA Burdenwith fault level of 25 KA for 3 seconds and creep age 31.0 mm/kv conforming to relevant IS, (i) Core 1: 100-50/1 or 5,Accuracy Class 5 P 10,(ii) Core 2: 100-50/1 or 5 , Accuracy class0.5,15 VAand all as specified and directed by Engineer-in-charge |
| 6 | Supply installation testing and commissioning oftype potential transformer with outdoor type dry type fault level of 25 KA for 3 seconds and creep age 31.0 mm/kv conforming relevant IS. (i) Winding 1 : 33KV/√3 : 110V/√3, 0.2 Class 100 VA & Winding 2 :33KV/√3 : 110v/√3, 0.2 Class 100 VA complete all as specified and directed by Engineer-in-charge |
| 7 | Supplying, Installation, Testing & Commissioning indoor type panels shall be constructed from CRCA/ Aluminium Zinc coated steel sheet of 2 mm thickness, floor mounted metal enclosed, 11 KV VCB panel with 1 No VCBs ( 1 OUTGOINGS), totally enclosed and fully interlocked, horizontal draw out, horizontal isolation type breaker as per IEC-62271-1,100,200, as amended up to date and additional Specifications, having capacities as mentioned below, single break, trip free mechanism, manually charged and manually closing breaker suitable for use on 11 KV, 3 phase, 50 Hz A.C. supply with short circuit fault level of 26.3kA for 3 sec , Panel shall be full internal arc tested i.e. in all three chambers at 26.3kA for 1 sec for safety purpose (AFLR). compete with self contained, fully interlocked, rack in and rack out mechanism, air insulated HT sleeved (PVC sleeve is not accepted) self supported copper bus bars of 630 amps capacity, breaker featured with mechanical ON/ OFF indicator with hand trip coil and auxiliary switch of 4 NO+4NC and equipped with following switchgears and accessories. Make of Vacuum interrupter, circuit breaker, Panel, relays & meters shall be same. Cable compartment suitable for 2RX3C x 240 sq. mm XLPE 11 KV cable (Cable entry from bottom) end termination with heat shrinkable jointing material etc as reqd. There must be a viewing window on VCB chamber door and same must be as per Internal arc test report. The basic insulation level of entire panel shall be 28KV(RMS) / 75KV(Peak)Outgoing - 1 No- 630 Amp VCB and each shall be consisting of (a) 630 Amp VCB - 1 Nos (b) Digital type multi function meter& Digital ammeter-1 Nos.(c) Flush mounted type Microprocessor based numercial IDMT relay with O/L, E/L and S/C, Arc fault protection communicable on modbus protocal for protection and Status monitoring with Master trip and Trip Ckt Supervision relay. Relay shall have programable 4 digital Inputs and 6 outputs- 1 Nos.(d) Dual core dual ratio 3 CTs 100/50/1 A of 5 VA burden and accuracy Class-0.5 for metering and class 5P10 for protection - 3 Nos.(e) Annunciator -8 Window- 1 Nos(f) Hooter - 1 Nos (g) Flash mounted Aux. Relay as required for OTI, WTI & Buchloz Alarm & Trip functions(h)Trip super vision Relay - 1 Nos.(i) Power panel pack with 220 Volt AC input & 110V Volt DC continuous output suitable for closing / tripping / indication etc |
| 8 | Supplying, Installation, Testing & Commissioning indoor type panels shall be constructed from CRCA/ Aluminium Zinc coated steel sheet of 2 mm thickness, floor mounted metal enclosed, 11 KV VCB panel with 1 nos VCBs ( 1 BUS COUPLER WITH RISER, totally enclosed and fully interlocked, horizontal draw out, horizontal isolation type breaker as per IEC-62271-1,100,200, as amended up to date and additional SPecifications, having capacities as mentioned below, single break, trip free mechanism, manually charged and manually closing breaker suitable for use on 11 KV, 3 phase, 50 Hz A.C. supply with short circuit fault level of 26.3kA for 3 sec , Panel shall be full internal arc tested i.e. in all three chambers at 26.3kA for 1 sec for safety purpose (AFLR). compete with self contained, fully interlocked, rack in and rack out mechanism, air insulated HT sleeved (PVC sleeve is not accepted) self supported copper bus bars of 630 amps capacity, breaker featured with mechanical ON/ OFF indicator with hand trip coil and auxiliary switch of 4 NO+4NC and equipped with following switchgears and accessories. Make of Vacuum interrupter, circuit breaker, Panel, relays & meters shall be same. Cable compartment suitable for 2RX3C x 240 sq. mm XLPE 11 KV cable (Cable entry from bottom) end termination with heat shrinkable jointing material etc as reqd. There must be a viewing window on VCB chamber door and same must be as per Internal arc test report. The basic insulation level of entire panel shall be 28KV(RMS) / 75KV(Peak)a) Bus Coupler - 1 No- 630 Amp VCB and each shall be consisting of a) 630 Amp VCB - 1 Nos f) R,Y,B ON, OFF, Trip Indication with Control MCB - 1 Set |
| 9 | Supply and fixing PVC sheathed copper control cable of 6 pair 2.5 Sqmm in different colours all as specified |
| 10 | Supply and fixing PVC sheathed copper control cable of 10 pair 2.5 Sqmm in different colours all as specified |
| 11 | Supplying, laying, jointing & testing of cable XLPE insulated screened PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) with stranded aluminum conductor, 33000 volts grade, (Earthed) cross sectional area 95 sqmm 3 core as per IS 7098 Pt-II complete all as specified. |
| 12 | Supplying, laying, jointing & testing of cable XLPE insulated screened PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) with stranded aluminum conductor, 11000 volts grade, (Earthed) cross sectional area 150 sqmm 3 core as per IS 7098 Pt-II complete all as specified. |
| 13 | M&L for brick work with fly ash bricks, straight or curved on plan exc 6 mmean radius built in CM (1:4) as in foundation of equipment, platform, ramp, cable ducts, supporting pillars of pipes/cables, proecting wall,complete all as specified and directed. |
| 14 | M&L for plastering in CM (1:4) 10 mm thick on fair faces of brick work or concrete surface/cable duct/floor complete all as specified and directed. |
| 15 | S & F of MS channel / angle iron for support, clamps and back plate fabrication from structural steel sections including nuts, bolts,in any shape or size as indicated or directed and inclusive of one primer coat, one under coat and one finishing coat of paint all as specified and directed. |
| 16 | Supply & fixingof main bus bar on bus bar gantries with ACSR panther conductor including laying, stringing & binding of conductors and fixing of disc fitting with disc sets with all types of PG clamps & connectors as per site requirements complete in all respects. |
| 17 | Supply and fixing of GI strip 32 x 6 mm fixed in ducts / on wall / in trenches / floors etc for earthing complete fixed to equipment / test point / earth electrode complete all as specified and directed |
| 18 | Supply and fixing of copper strip 20 x 3.15 mm fixed in ducts / on wall / in trenches / floors etc for earthing complete fixed to equipment / test point / earth electrode complete all as specified and directed |
| 19 | M&L for earthing complete with galvanised steel earth plate electrode of size 600X600X6 mm thick buried directly in ground (earth pit not less than 2.25 m deep below normal ground level) with top edge of the plate not less than 1.50 mtr below the ground level connected to galvanised iron strip of 32x6 mm as earth lead by means ofbolts nuts check nuts & washers of galvanised iron or steel ,surrounded by charcoal of coke and salt, protected by GI pipe 40 mm bore (light grade), water pipe 20mm bore GI medium grade with funnel and wire mesh,and making chamber of PCC (1:4:8) type D-2 using 40 mm graded stone aggregate and coping shall be in PCC(1:3:6) type C-1 using 20 mm graded stoneaggregate, 50 mm thick cover of RCC (1:2:4) type B-1 using 20 mm graded stone aggregate, reinforced with 8 mm dia TMTbars @ 80 mm c/c boath ways including excavation and earth work and removal of surplus soil todistance n exc 50 m complete all shown in electrical plate No 3of SSR part- 2010 and also including making test point for testing of earthingmade out ofgun metal or phosphorous bronge size 75x75x25 mm complete all as specified and directed. |
| 20 | M&L earthing complete with copper earth plate electrode 600mmx600mmx3.15mm thick,thick burried directly in ground vertically to a depth not less than 3.0 mtr deep below GL with top edge of the plate not less than 2.5 mtr below normal GL and connected to earth plate . Earth plate surrounded by 15 cm thick packed layers of charcoal dust and common saltupto 1.5 meter depth all around the earth plate and connected to earth leadof copper strip 20x3.15 mm by means of bolts, nuts, check nuts and washers of GI or steel and thimbles and other end of the earth wire connected to DB and protected by galvanized iron or steel pipe light grade 40 mm bore and water pipe 20mm bore GI medium grade with funnel and wire mesh, including all necessary excavation and earth work PCC chamber in cement concrete 1:3:6 type C-2 and RCC cover and all as shown in electrical plate No 3 of MES schedule Pt I of2009 and also including making test point for testing of earthingmade out ofgun metal or phosphorous bronge size 75x75x25 mm complete . |
| 21 | Supplying and laying synthetic Rubber insulating mats 2.5mm thick for voltage upto 11 KV for electrical purpose as per IS 15652-2006, (superseding IS 5424) suitable for electrical shock safety of size 2 x 1 mtr all as specified and directed. |
| 22 | Supply and fixCable jointing kit for 33 KV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size95 sqmm complete all as specified and directed. |
| 23 | Supply and fixCable jointing kit for 11 KV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size150 sqmm complete all as specified and directed. |
| 24 | Supply and fixCable jointing kit for 11 KV (Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 150 sqmm complete all as specified and directed. |
| 25 | Excavation in tranches in any type of soil not exc 1.5 mtrs wide and not exc 1.5mtr in depth for laying of pipe/cables/poles etc and getting out hard & densile soil complete all as specified and as directed |
| 26 | Removing excvated soils to a distance n.exc 50 mtr and depositig where directed at a level not exc 1.5 m above th starting point coplete all as specified and as directed. |
| 27 | Returning fitting in any type of soil including spreading leveling watering and well ramming in layers n.exc 25 cm complete all as specified and as directed. |
| 28 | M & L for laying of fine, clean sand (river sand) free from sharp materials and stone particalsin trenches for cushioning of cable 8 cm thick under cable and 15 cm thick over the cable including gently punning complete all as specified and directed. Note:- The total thickness of sand shallbe measured 18 cm after punning. |
| 29 | Supply and laying un-reinforced precast.concrete cable protection cover ofclass HV, type 1 with peak,size 300mm x 180mm x 40mm, factory madeof specified make , complete all as specified and directed. |
| 30 | Supply and laying galvanised tube light grade ISI marked of size 150 mm dia incl all fittings in trenches/ fixed on pole/ wall/ floor or laid in position complete all as specified and directed. |
| 31 | Supply and laying aggregate hard core, broken to gauge n exc 63 mmwith levelling with layer not exceeding 100mm in depth within the paremeter of 33 KV main receiving station GIS Bay switch yard complete all as specifed and directed. |
| 32 | Supply and fix PVC Chamber cover for cable duct of min size of 1.5 ft x 1.5 ft (square shape) having load capacity 4 ton, black shape complete ass as specified and directed. |
