PROVN OF REVERTING BACK FEED CONFIGURATION POWER RING PROJECT AT AF STATION SIRSA UNDER GE (AF) SIRSA

Supply, installation, testing and commissioning to step up, outdoor type distribution transformer,0.433/11 KV, (750 KVA), Level-2 as per IS 1180 ONAN/ONAF, 3 phase, 50HZ copper wound, two winding, core type transformers as per IS-1180-2014 (Ref to amendment No 4 dated March 2021 to IS: 1180-2014) star vector group & IEC: 76 VYNyno, OFF load Tap changer on HV side (+) 5% to (-) 15% in step of 1.25%, outdoor type, HV/LV brass bare bushing condenser type terminations with fitting and accessories as under including first fill of transformer oil complete all as specified and directed by Engineer-In-Charge. Main features of transformer are as follows:- (a)The core shall be of high grade cold rolled grain oriented (C.R.G.O) annealed silicon steel lamination confirming IS 1271 / 1958 secured properly using frames, clamps and bolts, confirming IS 1271 / 1958 secure properly using frames, clamps and bolts. (b) Winding HV & LV winding shall be done using High conductivity Electrolytic copper with insulation F-class grade. (c) Enclosure: Enclosure shall be rectangular and shall be built of electrically welded MS sheet wire mesh or perforated sheet for ventilation and comply with IP 43 protection as per IS: 2147 / IEC 529. (d) Bi-directional mild steel rollers 150 mm diameters and 75 mm width - 04 Nos (e) HV & LV Bushing: Porcelain / Epoxy HV and LV Bushings of appropriate voltage and current rating shall be mounted in HV and LV cable box. The high voltage bushings (3 Nos) shall be provided with R-Y-B colour coding marking & shall confirm to IS 3347. Brass rods 12 mm - 03 Nos for HV bushing terminal and tinned copper rods 20 mm - 04 Nos for LV Bushing terminals / extension for cable lug connections with necessary nuts, check nuts and plain thick tinned washers. Note : 1. The Transformer shall be complete with standard fittings all as specified conforming to IS: 1180 (part-I) 2014 and manufacturer shall hold licence/certificate from BIS to this effect. 2. The Transformer will have its initial oil filling to appropriate level ( Cost of oil including testing with desired dielectric strength is included) 3. Testing of the Transformer shall be carried out by the SEI 4. The contractor shall submit specification and drawing for approval of the CWE before procurement of the Transformer.

Supply and Fixing XLPE insulated, screened, 11000 volts, grade cross sectional area 95 Sqmm 3 core cable screened, PVC bedded, galvanised steel strip or wire armoured (Earthed), electric power cables (heavy duty) with aluminium conductor connection complete all as specified and as directed by engineer-in-charge.

Material and labour for Earthing complete with galvanised steel earth electrode plate of size 600mmx600mmx6mm thick, buried directly in ground(earth pit not less than 2.25m deep below normal ground level) with top edge of the plate not less than 1.50 mtr below normal ground level, connected to galvanised iron earth strip 32mmX6mm as earth lead up to test point with suitable GI nuts/bolts and brazed properly up to main board including earth pit in cement concrete 1:2:4 type B-1 using 20 mm graded stone aggregates,40 mm thick precast RCC cover in 1:2:4 reinforced with expanded metal(weight not less than 4 kg/sqm), and frame of angle iron 25mmx25mmx6mm with lugs 02 nos with 6mm dia MS bar handle made to shape, excavation and earth work in any type of soil and including medium grade GI watering pipe 20mm bore with funnel and wire mesh and medium grade GI earth wire protection pipe 40mm bore up to main board complete as shown in electrical plate no 3 of MES schedule Part-I , connected to earthing testing point by using galvanised iron strip 32 x 6mm and testing on completion complete all as specified and directed by Engr-in-charge.

Supply, Installation, Connecting, Testing and Commissioning of outdoor type extensible 11 KV, 630 Amp (IP67, (RMU (Ring man unit) 3 way comprising of 2 Nos 630 Amps, Load Break Switch (Comprising Two Nos. Incomers) & 1 Nos 630 Amps capacity SF-6 insulated Circuit Breaker as Outgoing. Inside robotically/manually/TIG welded stainless steel 304 (Non Ferric Non Magnetic Grade) filled with SF6 gas at suitable pressure in accordance with the IEC 60299 Tank having min thickness 2.5+0.5 mm having IP 67 Degree of Protection, RMU should be provided with internal bus bars, as well as earthing bus bars should be of copper, padlock provisions, & complete with all accessories. The RMU shall be type tested for internal arc test of not less than 21 KV/1 sec as per IEC 62271-200 RMU shall be equipped with site replaceable bushing. The earthing bus bar shall be provided inside each cable compartment for solid earthing of Cable shields. The outer enclosure main door should cover entire part of the switchgear including front cover and cable doors for providing complete IP 67 protection including raised foundation of suitable size, minimum 50cm above and 01 meter below the natural ground levels all as per manufacturer’s drawing. The unit shall include the following with all necessary standards fitting as required at site. (a) 1 Nos incoming Load Break Switch module should consist of following:- (i) 630A Load break Switch module for making and breaking of fault current along with, Earth Switch of full making capacity, Short time current –not less than not less than 21KV/1 Sec, Making Capacity-50KVA, Auxiliary contracts -1NO +1NC. Power Frequency withstand voltage -28KV. Impulse withstand voltage -75KV, Nominal operating gas pressure 1.3 (minimum) Bar abs, Front cover mechanism –IP2X, Cable covers-3X, Snap action mechanism for manual operation. Cable box for front termination of the cable suitable up to 3 core 400 SQmm, 11 KV XLPE cable. Right angle boots (push on type), Suitable site replaceable Cable bushings, Arc proof cable covers with self-interlocking mechanism with earth switch. Capacitive voltage indication fixed type system as per IE61243. (ii) Impulse withstand voltage 75KVP (an altitude <1000 m above msl) (iii) SF6 Gas pressure indicator. (iv) 230V AC shunt Trip coil for external trip signal. (v) Live cable indicating LEDs energized through capacitive voltage dividers. (vi) All feeders of RMU shall be provided with multifunction meters having complete range of measurement including maximum demand and shall have serial port for communication. (vii) Metering compartment of RMU shall be provided with auxiliary transformer of suitable capacity to supply power to battery charger. (viii) Integral earthing switch with making switch. (ix) Emergency Trip Push Button (x) Transformer card for auxiliary protection (xi) RMU shall be provided with 3 core metering and protection CTs minimum ratio for protection CTs shall be 400-200-100/5/1, 5P10,2.5VA and for metering CT shall be 20/5/1A Class 1,2.5 VA. (xii) Testing of RMU shall be carried out by SEI

(b) 02 Nos Outgoing SF6 Vaccume Circuit Breaker should consist of the following:- (i) 630A SF6 module for making and breaking of Fault current along with earth Switch of full making capacity. It should be capable to bear 40 dead short circuit operations. (ii) Short time current – not less than 21 KA/ 1 Sec (iii) Making Capacity – 50 KA (iv) Auxiliary contracts – 1 NO + 1 NC (v) Power frequency withstand voltage – 28KV (vi) Impulse withstand voltage – 75KV (viii) Nominal operating gas pressure -1.3 (minimum) bar abs. (ix) Cable covers -3X (x) Stored energy mechanism for Motor operation -24 Volt DC (xi) Cable box for front termination of the cable suitable upto 3 core 400Sqmm, 11 KV XLPE cable (xii) Right Angle Boots (Push on type) (xiii) Self Powered Microprocessor based Relay (3 O/C & E/F) with Standard settings. (xiv) Digital Multifunction Meter (A, V, KW, KVA, F, PF) with RS 485 port Type. (xv) Suitable site replaceable Cable bushings. (xvi) Arc Proof cable covers with self-interlocking mechanism between Doors, earth switch, disconnector & VCB (xvii) Capacitive voltage indication fixed type system. (xviii) Mechanical Indications for breaker ON, OFF, EARTH, TRIP, spring Charged-Discharged. (c) Bus Connected PT unit-1 Nos, for metering consisting of following:- (i) type M:Air Insulated metering module 12KV, 630A, not less than 21KA for 1 Sec-3 Voltage Transformers of the ratio 11K√3/110V/√3, 50VA Class 1.0 with HT fuses on primary side and MCB on secondary side. (ii) Microprocessor based IDMT (50, 50N, 51, 51N) relay for over current short circuit and earth fault protection. (iii) CFL Illumination -01 No. (iv) Space Heater with thermostat – 01 No. (v) Earth RYB phase indications for 2 incoming and 1 outgoing. (vi) Cable support bus bars, standard for 3 way unit. (vii) Bushings for external bus bar connection along with Bus bar cover & Sleeved bus bars for coupling – 01 Set (vii) 2x12V Battery with battery charger with suitable burden for motor operation input 230V AC & Output 24 DC

(d) Capacitive voltage indication fixed type VPIS 9-15KV (e) Necessary interlocking arrangement for safety and operations. (f) Operating Handle for Manual Operation – 01 Nos (g) Manometer-01 No. (h) Safety Interlocks shall be provided as per relevant IEC/IS standards and Manufacturer’s directions. (j) Above switchgear shall confirm to all relevant IEC/IS Standards. (k) Manual operation of SF6 Circuit Breaker should be possible without dismantling the motor from RMU. The motor should be fitting in such a way that it should not be outside front covers of RMU. (m) Coupling of RMU and metering module should be with the help of Botled type arrangement, so that the coupling at site shall be easy. Plug-in-type bushing shall not be acceptable. (n) All cable bushing should be replaceable type. (o) Module should be accommodated as per manufacturer’s design. (p) RMU cable box shall be front accessible type to have easy access to protection and metering CTs. Interrupter should be of same make. Cable box should be arc proof with bolted door and interlocked with respective earthing switches. Doors should be removable for the ease access to terminate cables. Note:- Panel, Breaker, Relay and Interrupter should be of same make. The Contractor will submit NABL accredited lab test reports of the RMU’s in original and the same shall be produced well before claiming RAR payment of the RMU. Note: - (i) Contractor will provide all type of testing certificate pertaining to RMU, including under warranty certificate. (ii) All type of routine type test or special test will be arranged/got carried out by contractor and cost of the same shall be deemed to be included in quoted rate. (iii) PCC work for the foundation of RMU will be built by contractor and size and location of said foundation will be specified and directed by Engg-in-Charge, costs of foundation and Transportation of RMU shall be deemed to be included in quoted rate. (iv) All type of loading/unloading/packing charges/Freight charges/toll/octroi/custom clearance or any other tax/levies etc will be arranged by contractor himself and shall be deemed to be included in quoted rates.

Supply installation,testing and commissioning LT panel indoor type, having copper bus bar 1500 amps, dust and vermin proof totally enclosed plateform mounted factory made (Protection class IP-65) double shutter gears front and rear frame work and 1.6 mm thick MS sheet duly painted with powder coated over two coats of redoxide primer and made of 75 x 75 x 6 mm thick angle iron frame all as specfified including necessay foundation.bolt grouted in PCC 1:2:4 for mounting the pannel suitable for 415 Volts, 50 C/s 3 phase and nutral system and ,internal wiring with suitable size of PVC insulated copper cable copper lugs comprising of following accessories with interlocking protection wiring. (A)Incoming (i) ACB 800 Amp 50 KA 4 Pole 415 v Draw out Mannual-02 Nos (ii) Ammeter 1000 Amps with CTs and selector switch -01 No. (iii) Voltmeter 0-500 volts with selector switch -01 No (iv) Indicating lamp- 01 set of three colour (R,Y,B) (B)Outgoing (i) ACB 800 Amp 50 KA 4 Pole 415V Draw out Mannual-02 Nos (ii) Ammeter 0-500 Amps with CTs and selector switch -02 No.

Supplying and laying XLPE insulated LT under ground cable 400 Sqmm 3.5 core, armoured, heavy duty, 1100 volts grade with aluminium conductor, multistranded,with lugs connected and laid in trenches, on poles, in ducts, on walls through pipes etc complete all as specified and as directed by Engr-in-charge.