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| 1 | Supply, installation, testing and commissioning complete with all accessories of transformer of 33 KV capacity 1.6 MVA step down, outdoor floor mounted, double copper wound, 3 Phase, 50 Hz,AC, Oil immersed, ONAN confirming to IS-2026 and IEC62770, including cooling fans, external cooling tubes/radiator cores type havingvoltage ratio 33000/11000 volts (corresponding to principal tapping ) winding delta connecting on Primary side (HV Side) and star connected on secondary side (LV side) in accordance with vector symbol Dyn11 (vector Group) with neutral brought out on LV side and looping on HV side for contact output so as to alter/ vary secondary voltage by (+) 5 to (-) 15% in equal steps of 1.25% to be changed by means of (OLTC) on load Tap Changer with floor mounted RTCC panel with AVR and marshaling box. Transformer shall be of BOLTLESS core design. Transformer shall be double wound, core type with low loss, non ageing, high permeability PRIME GRADE, CRGO with m4 grade or better, perfectly insulated and clamped to minimize noise and vibrations, core shall be purchased directly from manufacturer of core or from their accredited marketing network and not through any agent. Before placing order for procurement of transformer, the contractor shall submit the credentials in respect of the manufacturer ofcore and transformer shall be procured only after approval from GE in respect of name of manufacturer of transformer as well as manufacturer of core. The limit of termperature rise after continous full load runs as specified in IS/IEC 60076 shall be suitably adjusted to suit the ambient temperature of maximum 50 degree celsius prevailing at site all as specified and directed including having following characteristics :- |
| 2 | The transformer shall confirm to the latest edition of applicable standard as follows :-(i) IS-2026, for tests and tolerance of guarnteed Particulars. (ii) IS-3639 for Fitting and accessories. (iii) IS2099 for Bushing >1000V.(iv) IS-7421 for Bushing <1000 V (v) IS-1271 for Electrical insulation classified by Thermal stability.(a) Winding:(i) HV Winding -Layer/disc winding(ii) LV Winding-Helical/Disc widing (b) Insulation Level: (i) HV-170 (ii) LV-70 (c) Insulation level (Power frequency with Stand KVrms):(i) HV 70 (ii) LV-28 |
| 3 | (d) Tapping Range -(+)5% to (-) 15% @1.25%(e) Tape Changer Type -On load Tap Changer +RTCC+AVR (floor mounted). (f) Temperature Rise (Oil/Winding) -50/55 Degree Centigrade(g) Hot spot temperature over a meximum yearly weight average ambient temp of 32 Degree Centigrade-98 Degree Centigrade(h) Termination HV/LV-Outdoor Bushing(j) Short Circuit thermal withstand time-02 seconds (k) %impedance at 75 °C clurrent and frequency (Subject to IS Tolrance) at -6.25% + tolerance(l) No load loss at rated voltage and frequency (subject to IS Tolerance) (KW) = 2.3 KW (max)(m) Load loss at rated current and 75 degree C (KW) (subject to IS Tolerance ) = 16 KW (max) |
| 4 | The transformer should have following fitting and accessories :-(a) Outdoor bushing on 11 KV secondary side for single core XLPE cable 3 Core 185 Sqmm - (Bare Bushing)(b) Outdoor 33 KV bushing insulator for connection through openconductor with sleeves.(c)Oil conservator with filling hole and cape drain valve and oil level guage.(d) Dehydrating breather wth connecting pipe first fill of dehydrating agent and oil seal.(e) Explosion relief vent mounted on tank with double diaphragm and equilliser pipe connection to conservator air space (Pressure release device)(f) Air relief plug.(g) Shut off valve between the conservator and buchholz relay.(h) Drain valve with threaded adopter. |
| 5 | (j) Filter valve with threaded adopter (Top and bottom).(k) Wheels (l) Rating plate and terminals marking plate.(m) Extra bushing for neutral out side the LV Side (n) Hand hole sufficient size to assess the interior of the tank.(o) First filling of the transformer oil.(p) Cover Lifting eyes.(q)Double float Buchholz relay with trip and alarm contacts.(r) 150mm dial type thermometer for winding temperature indicator having range0-12 centigrade vapor pressure type with maximum reading pointer/Max temperature indicator and resetting devicewith alarm/trip contact and additional contact for switching on the cooling fan.(s) Dial type thermometer for oiltemperature indicator with 02 sets of contacts for alarm and triphaving range 0-12 centigrade vapor pressure type with maximum reading pointer/Max temperature indicator and resetting devicewith alaram/trip contact .(t) Shut off valve between cooling tubes and tank.(u) Pressure Release Valve (PRV) with one set of trip contact.(v) Magnetic Oil gauage (MOLG) with one set of trip contact. (w) Earthing terminal for connecting earthing lead |
| 6 | NOTE:-(i) The oil temperature and winding temperature guages shall be housed in a marshaling box made up of MS sheet as per manufacturer recommendations with hinged door and having glass front side of the box and provision for entry of cables and compression glands.(ii) Following documents to be submitted for core during the stage inspection:(a) Invoice of supplier(b) Factory test certificates(c) Packing list(iii) OEM should have in-house NABL accredited lab for testing. |
| 7 | Supplying, erectioning, testing and commissiong of 36 KV, 250 MVA, 400 A or higher available capacity, 50Hzvoltage class outdoor type Vaccum Circuit Breaker for use on system voltage 33 KV. The circuit breaker and accessories shall conform to IEC-62271-100 or IS 13118 and other relevant IEC/IS standard. The circuit breaker shall be complete with terminal connection, operating mechanism, control cabinets, piping, interpole cable accessories like gland, terminal block, lugs, 02 Nos level pressure switch scale. necessary steel support structure for CB and control cabinet. The circuit breaker shall be required to performs as per technical parameters given below:- |
| 8 | (a) Installation - Outdoor, 3-pole, Live-Tank, Porcelain Clad, Switchyard Breaker(b) Rated Voltage - 36 KV(c) Rated Current - 400A or higher(d) Power frequency with stand voltage (KV rms)- 70 KV(e) 12/50 microsecond lighting impuls with stand voltage (KV Peak)-170 kVp(f) Rated short circuit current breaking capacity (3 Sec ) at rated voltage specified 31.5 KA(g) Control Voltage incl. trip/close coil - 30V DC (h) Spring Charging Voltage - 230VAC(j) Symmetrical interrupting capacity (KA/RMS) 31.5 KA for 3 sec |
| 9 | (k) Rated short circuit Making Current (KAP)-80A(l)Out of phase breaking capacity (KA rms) as per IEC(m) Rated operating duty as per IEC(o) Temp rise over the design ambient temperature -As per IEC 62271-100(n)Operating Mechanism -Spring (o) Creepage distance as per IEC-900mm (p) No of trip/close coil 30 V DC-02 Nos(q) Tripping system - 30 V DCNote:-(i) Cost of supply and fix of Outdoor type Terminal Kiosk (TK) havingterminals/disconnecting-links for termination of CT/PT wiring including PT secondary fuses complete all as required at site are deemed to be included in the quoted rate.(ii) Cost of construction of foundation including construction material and necessary earth work as per manufacturer design for breaker TK complete all as required at site are deemed to be included in the quoted rate. |
| 10 | Supply, installationlaying & testing of 33KV Transformer protection and control & relay panel indoor type for Vaccum Circuit Breaker.The panel shall be with back access double door arrangement, dust and vermin proof , IP -4X class protection and made 2mm , CRCA MS sheet powder coated finsh over one coat of red oxide primer both side operating type, including internal wiring using 1.1kV FRLS insulated multistrand cable (2.5sqmm for CT/PT and control circuit, numbered and colour coded as per IS-5578/1984 having suitable entry for cable consisting of the following:- |
| 11 | (A) Microprocessor based Transformer & feeder protection Relay with LCD displaying mimic bay for ON/OFF control and monitoring of feeder current transformer parametres built in as of 11 KV VCB panel relay disturbance recorderand event logger to monitor the Sequence of Events (SoE) using upto 800 event codes. The relay shall be communicable with SCADA system. |
| 12 | (i) Over current and earth fault protection with minimum pickup at low set of 5% and 1% respectively(ii) Transient/intermittent earth fault protection(iii) Phase discontinuity protection |
| 13 | (B) Flush mounted auxillary relays for:-(i) Trip Circuit Supervision(ii) Master Trip(iii) Fuse fail (PT) supervision operated (iv) DC supervision scheme(v) Overvoltage/ undervoltagereay within max value settings with reset |
| 14 | (C) Metering(i) Metering Equipment incl. 01 x Digital Voltmeter (Acc.Cl.0.5), 01 x Digital Ammeter (Acc.Cl.0.5), 01 x Tri-Vector-Meter (Acc.Cl.0.5). (ii) 01no. Multi-Function-Meter (Acc.Cl.0.5) shall be provided with LCD display for measuring current, voltage, power, power-factor and energy-parameters, Total Harmonic Distortion and Max. Demand Indication, same shall be communicable on ModBus via RS485 port. |
| 15 | (D) Indicating Lamp. (i) Bus-01 Isolator ON/OFF. (ii) Bus-02 Isolator ON/OFF. (iii) Line Isolator ON/OFF/EARTH(iv) CB auto trip. (v) CB ON. (vi) CB OFF. ii) CB Spring Charge. iii) Trip circuit healthy. x) DC Available LED with push-button(x) R-Y-B Phase LED Indication |
| 16 | (E) Semaphore indicator. (i) Circuit Breaker ON, OFF. (ii) Bus-01 Isolator ON, OFF. (iii) Bus-02 Isolator ON, OFF. (iv) Line Isolator ON, OFF, EARTH |
| 17 | (F) Control switches/Push Buttons(i) Trip-Neutral-Close Switch for Circuit Breaker Control - 01no. (ii) MCB for AC isolation - 01no. (iii) MCB for DC isolation - 01no.(iv) Heater switch with thermostat - 01no. (v) 3-pin socket with ON/OFF switch - 01no.(vi) CFL Lamp with ON/OFF switch - 01no. |
| 18 | (G) 08-Window Annunciator with hooter and Mute, Acknowledge, Reset and Test buttons for:- (i) OC Trip Alarm(ii) EF Trip Alarm (iii) Line Differential Trip Alarm (iv) PT Fuse Failure Alarm. (v) Trip Circuit Failure. (vi) Spare. |
| 19 | (H) Transformer protection Auxilliary relays for Oil Temp, MOG, Bucholtz relay etc with master trip relay - 01 Set |
| 20 | (J) Test Terminal Block for CT |
| 21 | (K) Thecost of construction of foundation as per manufacturer design, necessary PCC work, demolition of floors/walls of substation including foundation frame (supplied by OEM) for control panel as required at site are deemed to be included in the quoted rate. |
| 22 | S&F CT 33 KV outdoor type single Phase oil immersed self cooled having CT ratio 50/1 withcopper double wound dual ratio to be fitted on HV side of Transformercomplete all as per IS 2705 accuracy class-I burden 15 VA separate core for metering & separate core for protection duly calibrated according to load all as specified and directed |
| 23 | S&F PT 33 KV outdoor type single Phase oil cooled PT of ratio 33/rt3/110/rt3/110rt3 class 0.50-3, burden 50 VA, insulation level 70/170 KV voltage factor 1.2 Cont and 1.9 for 30 second confirming to IS 3156 complete all as specified and directed |
| 24 | Supply, installation, testingand commissioning of Triple Pole,double break Isolator is rotating type, gang operated, Rotating Isolator with Earth Switch, System Voltage - 33 KV, Rated Voltage -36 KV, Rated Current- 400 Amp,Rated Short Time Current for 3 Sec-25 KA , Rated Peak withstand Current - 63 KA, Governing specification -IS 9921-1985 /IEC 129-1975. The rotating isolator has triple pole construction and shall be suitable for Horizontal upright mounting. Each pole consist of galvanized steel base, solid core or post type insulators of reputed make, EC grade copper fix and moving contacts. G.I. coupling pipe of adequate length for rotating operation, required length of G.I. pipe for operation from ground level and operating handle is specially design for smooth operation. Adjustable pins are provided to limit over travel of moving post. Ferrous parts to be hotdip galvanized and non-ferrous parts heavily tinned to withstand weather complete all as specified and directed. |
| 25 | M&L for lightning arrestor confirming to IS-3070 (Part-1) having voltage rating 36 KV, rated frequency 50 Hz, nominal discharge current 10 KA (heavy duty) station class type complete with all fittings suitable for 33 KV, 3 phase earthed distribution system complete all as specified and directed. |
| 26 | M&L for earthing complete with copper earth plate electrode 600 mm x 600 mm x 3 mm 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 20x3mm 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. Note : 1.RCC pit cover shall be pre-cast of RCC (1:2:4) type B-I , 80mm thick reinforced with XPM weighting not less than 4 KG/sqmmin lieu of CI cover.2. Charcoal dust and commonsaltupto 1.5 meter depth shall be filled in layers of 15 centimeters all around the earth plate. 3.On testing after completion of earthing if desired earth resistance is not achieved, the earthing will be redone at no extra cost to obtain the desired earth values.4. The cost ofcopper earth lead & G Ipipe of 7.50 mtr length for protection of GI wire and excavation work for pit shalldeemed to be included in this item. |
| 27 | 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. Note:(i) The cost ofGI earth lead & G Ipipe of 7.50 mtr length for protection of GI wire and excavation work for pit shalldeemed to be included in this item.(ii) RCC pit cover shall be pre-cast of RCC (1:2:4) type B-I , 80mm thick reinforced with XPM weighting not less than 4 KG/sqmmin lieu of CI cover.(iii). Charcoal dust and commonsaltupto 1.5 meter depth shall be filled in layers of 15 centimeters all around the earth plate. (iv).On testing after completion of earthing if desired earth resistance is not achieved, the earthing will be redone at no extra cost to obtain the desired earth values. |
| 28 | Supply, fabrication and fixing MS work like joist, channel, cross arms bracings, angle, flat irons, cutting, welding for 33 KV switches yard gantry and other works as per site requirement including Nut, bolts, washers, necessary welding work and two coats of aluminium paint (ready to use) over a coat of red oxide primer complete all as specified & directed. |
| 29 | Supply, laying, jointing and testing of HT underground electric power cable, XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, (conforming toIS-7098 Part-I), ISI Marked aluminium conductor multi stranded, heavy duty,11000 Volts grade ( earthed ) of size 120 Sqmm, 3 core in trenches/ ducts/ along poles/ through pipe/ under road/ PCC etc complete all as specified and directed.Notes:(a)Excavation, returning, removal, sand cushioning, cable protection covers, GI protection pipe etc and HT cable end joints/ straight through joints shall be measured and paid separately.(b)Any damage done during cable excavation to the existing UG infra like UG pipelines, UG electric cables, OFC etc shall be repaired by the contractor at their own expenses.(c)Cost of T&P required for handling/ laying of cable is deemed to be included in the rate quoted by the contractor. |
| 30 | Supply, laying and testing PVC insulated, PVC sheathed cable galvanised steel strip or wire armoured, electric control cable (heavy duty) with stranded copper conductor of size 1.5 Sqmm, 4 core, 1100 volts grade complete all as specified and directed. |
| 31 | Supply, laying and testing PVC insulated, PVC sheathed cable galvanised steel strip or wire armoured, electric control cable (heavy duty) with stranded copper conductor of size 1.5 Sqmm, 12 core, 1100 volts grade complete all as specified and directed. |
| 32 | Supply, laying and testing PVC insulated, PVC sheathed cable galvanised steel strip or wire armoured, electric control cable (heavy duty) with stranded copper conductor of size 2.5 Sqmm, 2 core, 1100 volts grade complete all as specified and directed. |
| 33 | S & F cable jointing kit for 11 KV 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 120 sqmm complete all as specified and directed. |
| 34 | M&L for underground pneumatic horizontal drilling of holes (HDD) under road, pavement, hard standing as required length at site by trenchless technology using ultra sound technique with necessary horizontal direction drilling machine . The contractor shall be conduct under ground scanning to detect existing HT/LT cable line , sewage line, OFC Cable etc to avoid damage. The entry/exist hole must be large enough to fit the drilling tool and the operator in it so they can aim the tool. The hole also must be deep enough that as the tool compacts the ground and the surface to be remain undisturbed. The depth of the starting bore pit depends on the type of the soil that is being worked in and how well it compacts. The operator shall aim the tool to the desire exit point and allow it to perform it function creating a bore hole under the ground without disturbing surfaces. The operator also should monitor the surface to make sure that, it is undisturbed. As the tool near to the exit point it is slowed down and the exit pit should be dug to locate both the tool and the bore. As the tool enters the exit pit the operator should choose either dig up the tool to retrieve it or reverses the tool back into the first bore pit to retrieve it including connected earth work, complete all as specified and directed. |
| 35 | Supply & Laying ofHigh density polyethylene pipes (HDPE) of pressure rating HDPE Pipes PN 6 size 110mm dia laid in trenches for the protection of HT UG Cable complete all as specified and directed. |
| 36 | Supplying, errecting and fixing steel tubular swaged poles of following type and height, complete with cast iron base plate, heat resistance finial taper plug, bolts, nuts and screws as specified including painting withtwo coats of synthetic enamalled paint over one coat of red oxide primer and 06 Nos bands/straps with white/ red/ black/ yellow as required (30cm wide each) epoxy heat resistant paint at a distance 30cm from plinth block and numbering of poles with black synthetic enamel paint in 2.5 cm height all as directed.Notes: 1. Excavation, returning, removal, PCC for foundation and coping etc shall be measured and paid separately.2. Any damage done during erection of pole to the existing UG infra like UG pipelines, UG electric cables, OFC etc shall be repaired by the contractor at their own expenses.3. Cost of T&P required for transporting/ handling/ erection etc of pole is deemed to be included in the rate quoted by the contractor. |
| 37 | Type 410-SP-31, 9.00 metre long |
| 38 | Type 410-SP-55, 11.00 metre long |
| 39 | Supplying, installing and testing gang operated air break switch 12 insulator type, HT 11 KV, AC 50 C/S, Triple pole, Horizontal/ vertical mounting type, mechanically operated from ground, mounted on 12 silicon rubber insulators 11 KV grade and steel frame, current rating upto 200 Amps complete with fuse mounting, fuse carriers and fuse elements of required capacity fixed on the pole structure on channel/ angle iron/ cross arm with suitable GI nuts, bolts & washers etc complete all as specified and directed. |
| 40 | Excavation in trenches in any type of soil not exc. 1.5 mtr wide and not exc. 1.5 mtr in depth for laying of cable, foundation etcand getting out complete all as specified and directed. |
| 41 | Excavation in trenches in any type of soil not exc. 1.5 mtr wide and exc. 1.5 mtr and not exc. 3.0 mtr in depth for laying of cable, foundation etcand getting out complete all as specified and directed. |
| 42 | M&L for sand cushioning & covering of under ground cable using crushed metal sand in trenches for cable protection complete all as specified and directed. |
| 43 | Material and labour for laying un-reinforced precast concrete cable cover, class HV type-1, flat size 300x180x40 mm for protection of U/G cable laid dry flat over the cable with width equal to length of the cable and abutting each other with gap between adjacent slab not exc. 10mm over UG cable in trenches complete all as specified and directed. |
| 44 | Returning, filling in including spreading levelling watering and well ramming in layers not exceeding 25 cm in soil complete all as specified and directed. |
| 45 | Removing of excavated soil to a distance n exc 50 mtr and deposited where directed at a level not exc 1.5 mtr above the starting point complete all as specified and directed. |
| 46 | M&L for PCC (1:4:8) type D-2 (using 40 mm graded crushed stone aggregate) as in foundations and mass concrete for foundations of poles etc complete all as specified and directed. |
| 47 | M&L for PCC (1:2:4) type B-1 (using 20 mm graded crushed stone aggregate) for coping of poles including necessary from work for finishing exposed faces of concrete finished even and smooth with using extra cement complete all as specified and directed. |
| 48 | S&F danger notice plate of 1.6 mm thick mild steel sheet vitreous enamaled white, with letters, figures and conventional skull and bones in signal red colour fixed with and including MS clamps, bolts and nuts of approved size for HT, 25x20 cm size complete all as specified and directed. |
| 49 | M&L for anti-climbing device, spikes type fabricated out of M.S. bars (round, square and flat) including nuts, bolts, washers and welding in two halves made to shape to suit the cross section of the pole all as directed. |
