PROVN OF ELECTRIC INFRASTRUCTURE AND ALLIED WORKS FOR 33/11 KV SUB STATION UNDER GE (A) JAISALMER

Supply, transporting, errection, testing & commissioning of 33/36 kV, 1250A, 750 MVA, 50Hz, voltage class outdoor type PC Vacuum Circuit Breaker with sheet steel clad,vermin and weather proof,for use on system voltage 33/36 kV along with indoor Control and Relay panel as per description below :- The Circuit Breaker and accessories shall confirm 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,cable accessories,with gland,terminal block,lugs,necessary steel support structure for CB and control cabinet. The Circuit Breaker shall be required to perform as per technical parameters given below and shall be suitable to work at an extreme climatic conditions.The circuit-breaker has to control at least 10,000 Make-Break cycles (One operating cycle of making & Breaking) operations at rated current or 100 breaking operations at rated short-circuit breaking current without maintenance. The mechanical life of the vacuum interrupter has to comprise at least 20,000 operating cycles. The operating mechanism must be maintenance-free without time limit up to 10,000 operating cycles.

Item No 1.00 Contd...:- a) Installation - Outdoor, 3-Pole,vacuum Live Tank, sheet steel Clad,Switchyard Breaker. b) Rated Voltage -36kV/33 KV c) Rated Current -1250A or higher upto 2000A . d) power frequency withstand voltage (kV rms) - 95 kV e) 12/50 µsec. Lightning impulse withstand voltage (kV peak) -170kVp.& power frequency withstand voltage - 70KV. f) Rated Short Circuit Current Breaking capacity (for 3 sec.) at rated voltage specified : 25kA . g) Control Voltage of Trip /closing coil - 110VDC/24 V DC h) Motor operated Spring charge voltage - 230VAC i) Symmetrical Interrupting Capacity (kA rms) as per IEC : 25 kA j) Rated Short Circuit Making Current (kAp) - 63 kA k) Out of Phase Breaking Capacity - As per IEC. l) Rated Operating Duty : As per IEC. m) Temperature Rise over the design ambient temperature - As per IEC 62271-100. n) Operating Mechanism - Spring type. o) Min Protected Creepage Distance - 900mm /450 mm p) No.of Trip/close coils - 2 nos. each. q) Spring charging handle - Integral part of Operating mechanism. r) NO/NC auxialiary contacts s)Mechanical trip/close levers t) Mechanical position showing "Spring charge/Spring free" u) Emergency hand trip v) Space heater with control switch w) Local/remote control switch x) Hand operated spring charging device breaker y) Maximum pole scatter - 10 Milli Sec

Supply and installation of 33 KV, single phase, out door oil cooled CT of ratio 100-50/5-5 -5Amp, class 1.0 / 5P10, burden 15 VA complete all as specified and directed by Engineer-in-Charge. Standards : IEC:185 and IS:2705 Core 1:- For instrumentation and metering Core2:- For Combined over current and earth fault protection Core 3:- For differentil protection Rated voltage :- 36 KV Short time current rating : 25 KA rms for 3 Sec. Creepage distance : 900 mm Min Protected creepage distance : 450 mm Min Insulation level impulse : 170 KV Power frequency 1 min voltage withstand level ; 70 KV

Supply and installation of 33 KV single phase out door oil cooled PT of ratio 33 KV/rt3/110 V/rt3/110V/rt3,Class 0.5-3, Burden 50 VA – 50 VA complete all as specified and directed by Engineer-in-Charge. Standards : IEC:185 and IS: 3156 Application :- Instrumentation and metering No of secondary windings :- 01 Primary windings winding one minute frequency voltage(Phase to earth) : 70 KV Primary windings impulse withstand voltage to earth : 170 kV Secondary winding one min power frequency voltage (between sections) : 3 KV Rated voltage factor continuoes - 1.2 Rated voltage factor 30 Sec : 1.5 Creepage distance to earth in mm per KV of highest phase to phase voltage : 25

Supply, commissioning and testing of necessary battery bank consisting of 55 No of cells 02 Volt each drycell maintanance free of capacity 42 Ah for minimum backup for 24 hours alongwith charger input volatge 230V,110 V DC complete all as specified and directed by Engineer-in-Charge.

S&F HT 33 KV out door gang operated air-break switch 9 insulator rocking type horizontal mounting of 200 Amps rating complete including necessary hard ware for fixing complete all as specified and directed by Engineer-in-Charge.

Supply, installation and testing of HT 11 KV, 3 phase 50 Hz, indoor type shall complied to IS-13118/IEC 56, totally enclosed metal clad switch gear,vermin proof complete with Vacuum Circuit Breaker having rupturing capacity 350 MVA, overload and earth fault protection, ammeter, voltmeter and of rating upto 630 Amp, complete all as specified and directed by Engineer-in-Charge. Rated system voltage :- 11000 V Rated switch gear voltage :- 12000 V Rated current :- 630 Amp Breaking capacity (for 3 Sec):- 13.1 KA Insulation level :- 75 KV Motorised spring charge volTAGE:- 230 v AC Trip/close coil voltage :- 110 V DC Accessories operating voltage :- 24 V DC CT Ratio:- 200-100/5-5A,15 VA PT Ratio :- 11000/√3 /110/√3 V Multifunctional Meter -01(A,V,KWH,PF,Frequency,KVAH) Breaker/isolator control switch -01(Trip-Nuetral-Close) Springe chrge/free indicator etc as necessary on site. Note :- The quoted rate shall deemed to be included for matching New VCBs with the existing system by necessary modifactions of bus bar and fabrication required at site.

S&F cable jointing kit for 11 KV 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 size 120 to 185 sqmm complete all as specified and directed by Engineer-in-Charge.

Supply and fix lightning arrestor HT 33 KV 10 KA station class complete all as specified and directed by Engineer-in-Charge.

Supply, laying & testing cable XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty)with stranded aluminium conductor, 11000 volts grade,earthed type of size 3 core 185 sq mm all complete all as specified and directed by Engineer-in-Charge.

Supplying and laying synthetic rubber insulated 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 sizes 2m x 1m complete all as specified and directed by Engineer-in-Charge.

Construction of Plinth of size 3m x 3m x 0.6 m for transformer, using 100 mm thick PCC 1:4:8 type D-2 as in lean concrete, flyash brick masonry in CM 1:6, the top of the plinth shall consist of 100 mm thick PCC 1:2:4 type B-1 (using 20 mm graded stone aggregates) over 75 mm thick PCC 1:4:8 type D-2 over compacted moorum filling, 10 mm thick rendering in CM 1:4 on brick surface with and including 25 cm thick stone aggregates of size 12.5 mm all around upto and including 1.5 m from the edge of the plinth complete all as specified and directed by Engineer-in-Charge.

M&L for earthing not less than 250 mm dia 16 feet deep filled with black soil up to 7 feet from bottom complete with galvanized iron pipe 40 mm bore medium grade 3 meter long tapers at bottom & provided 12 mm holes (staggered) at 75 mm centre to centre up to 2.5 meter of length from bottom , burried directly in ground filled with 45 cm alternate layer of chemical magnisium sulphate & salt up to ground level connected to galvanized iron strip 32 x 6mm as earthing lead by means of bolt and nut, check nuts and washer of galvanized iron or steel including brazing work and 40mm dia light grade pipe for earth lead protection including all necessary earth work, excavation, earth chamber with PCC 1:3:6, type C1 and RCC chamber cover of PCC 1:2:4 with handle and 20mm dia GI watering pipe with funnel and wire mesh etc and testing on complete all as specified and directed by Engineer-in-Charge.

M&L for earthing not less than 200 mm dia 300 feet deep filled with black soil up to 50 feet from bottom complete with galvanized iron pipe 100 mm bore medium grade 6 meter long flanged at bottom & boltted/nuts & provided 12 mm holes (staggered) at centre to centre upto 250 feet complete length, burried directly in ground filled with 10 mtr alternate layer of chemical magnisium sulphate & salt up to ground level duly clamped on ground connected to galvanized iron strip 50x6 mm as earthing lead by means of bolt and nut, check nuts and brazing/welding, check nuts and washer of galvanized iron or steel including brazing work and 100mm dia light grade pipe for earth lead protection and testing on completion upto transformer neutral complete with funnel, earthing chamber and earthing lid cover and complete all as specified and directed by Engineer-in-Charge. NOTE:- (i) Excavation & earth work in any type of soil including removing of surplus material upto 100M (ii) PCC (1:3:6) type C1 using 20mm graded stone aggregate in pit & 40mm thick precast RCC (1:2:4) type B1 cover 50x50 cm with 8mm round bar @ 15 cm C/C both ways. (iii) Main earthing strip from earth electrode to test point upto 7.5 mtr. (iv) Funnel with watering pipe [GI pipe] 20mm bore [ISI marked] medium grade & copper lugs and charcoal & salt as reqd. (v) GI protection pipe of size 80 mm bore light grade 7.5m.

M&L for MS cross arms, bracing supports, clamps, back plates, hooks etc fabricated from structural steel section (MS channel, angle sections, flat, round or square bars ) for reqd sizes and shape including bolts nuts & washers welding bending cutting cold or hot drilling holes for inserting in any shape or size as indicated or directed complete including applying two coats of aluminium paint over a coat of red oxide primer complete all as specified and directed by Engineer-in-Charge.

M&L for shifting of 2 MVA transformer from MRS near TCP-1 to MRS near Stn HQ Jaisalmer. It includes lifting of T/F, transport, commissioning and testing at other place as directed by Engineer in charge. Contractor will be responsible for any damage to equipment while shifting and shall be repair tonecessary working condition. Contractor shall ensure due care shall be taken while shifting the transformer complete all as specified and directed by Engineer-in-Charge.

S&F post insulator, porcelain, vitreous, with hardware fitting complete for 33000 volts grade complete all as specified and directed by Engineer-in-Charge.

S&F disc insulator, porcelain, vitreous, with hardware fitting complete for 33000 volts grade complete all as specified and directed by Engineer-in-Charge.

M&L for substation yard spreading levelling with 20 mm graded coarse aggregate / gravells laid approximately 75 mm thick layers near VCB/Transformer /2/4 pole structure and plateform etc complete all as specified and directed by Engineer-in-Charge.

M&L for substation yard spreading levelling with 40 mm graded coarse aggregate / gravells laid approximately 75 mm thick layers near VCB/Transformer /2/4 pole structure and plateform etc complete all as specified and directed by Engineer-in-Charge.

S&F ACSR conductor of size as per site requirement and strengthening on insulators including aluminium binding wire complete all as specified and directed by Engineer-in-Charge.