PROVN OF STAND BY 33 KV POWER TRANSFORMER ALONGWITH ALLIED INFRASTRUCTURE UNDER GE 862 EWS

PCC platform for transformer of capaciy 3.15MVA with minimum height one meter and other dimentions as per manufacturer of transformer, the design strength of PCC platform shall as per manufacturer of transformer to bear the load and height of bushing for conductor connection complete all as specified and directed. Note:-(i) For reference of finishes & minimum sectional dimensions TD No. CE TD/1129/96 sheet No. 1/2 & 2/2 shall be folowed. (ii) In case tranformer manufacturer's recommended dimensions & specification of platform are more than the dimensions indicated in TD drawing, then, the dimensions of platform as recommended by manufacturer shall be followed. However if the dimensions & specification of platform recommended by manufacturer are less than dimensions & specification indicated inTD drawing, then the dimensions indicated in TD drawing shall be followed for construction of platform. This aspect shall deemed to be included in quoted rate by contractor. Nothing extra shall be paid on this account.

Supply, installation and commissioning of HT 33 KV, single phase, out door oil cooled CT of ratio 100/5-5 Amp, class 1.0 / SP10, burden as per design for protection and metering In VCB, complying with IS:2705, complete all as specified and directed.

Supply installation and commissioning of HT 33 KV, single phase, out door oil cooled PT of ratio 33 KV /RT3/110V/RT3, class 0.5-3, burden as per design for protection and metering in VCB, complying with IS:3156 complete all as specified and directed.

Supply, installation, testing, & commissioning outdoor type Power transformer having no load voltage ratio at rated voltage 33/11 KV, 3150 KVA oil immersed, naturally cooled 3 phase 50 Hz, vector group DYN-11 and ON Load tap Changer with AVR & RTCC +5% to -15% in step of 1.25% tap changing switch on HT side to vary secondary voltage, connected internally and hand operated ON Load tap changing switch, star Delta connected internally with HV coil, copper double wound, LV side provided with 3 phase and neutral with the temperature rise not exceeding 50 degree celsius by thermometer in oil and 55 degree celsius by resistance with first filling of oil as per IS grade 335 and transformer conforming to IS 2026 "class A" all as directed and specified. The Manufacturer must have ISO Certificates and Lab must be NABL approved to ascertain genuine product quality. Paint should be PU. Painting process should be done in environment friendly painting booth with heaters for curing of paint.The following fittings and accessories including first fill of transformer oil, necessary mounting fixtures for mounting on platform as per manufacturer's recommendations and specifications are included in the quoted rate of this item:- (a) Lifting lugs, Top cover lugs & jacking Pad. (b) Earthing Terminals. (c ) Conservator with oil gauge Glass, Oil filling hole with plug and drain plug. (d) Transformer Drain valve and filtration valve. (e) 04 No Bi-directional plain/Flat rollers. (f) Pressure release valve and explosion vent with diaphragm. (g) Thermometer Pocket. (Contd......../ )

Supply and installation of HT 33 KV, 3 phase, 50 cycles, rated amp 1250A rated symetrical breaking capacity 25KA for 3 sec ( min), rated making capacity 62.5KA (min) outdoor type porcelain cladded structure mounted VCB switchgear, The vacuum interrupters are housed in hollow porcelain insulators filled with SF6/Nitrogen gas at 0.5 bar above atmospheric pressure to safeguard against condensation. A spring operated mechanism is housed in a weather-proof cabinet and a sturdy extruded steel angle structure is used for mounting the breaker. Simple and reliable spring mechanism minimizes operating energy and ensures longer mechanical life. Following parts shall form the part of VCB:- 1. Pole assembly as per manufacture design in accordance of relevent IS/IEC. 2. Cabinate with operating mechanism. 3. Steel structure of galvanised steel. Cabinate with operating mechanism consist of:- (i) Base cabinate made of manufacturer standard as per relevent IS/IEC houses a spring operated mechanism which is mechanically linked to all three poles. The cabinate also includes anti condensation heater, circuit breaker status indicator, mechanical operation counter, break control switches, anti pumping relay, AC/DC fuses, auxiliary wiring and terminal blocks. (ii) Operating mechanism having robust spring operated mechanism having feature O-C-O operation without recharging, motor for spring charge along with manual charging,mechanical/ electrical anti pumping, high speed reclosing feature,mannual closing and tripping, mechanical ON-OFF and spring charge indication, sufficient no of auxiliary switches NO & NC. The remote control panel for automatic and manual VCB operation shall be indoor type will have earth fault relay, overcurrent relay, shunt tripping coil, control wiring from CT,PT,Buchholz relay,WTI and OTI for tripping of VCB and alarm indication as of case be. Metering system will be digital voltmeter for LL and each phase voltage and digital ammeter for each phase current, necessary DC voltage required for relay operation for tripping of VCB shall be part of unit. Note: Contractor shall provide hard and soft copy of all the relevent IS/IEC applicable in above item.

Supply, installation and commissioning of Ring main unit( 3 way) VCB two incoming and one outgoing, 11 KV ,630 Amp, 350 MVA, Confirming to IS13118/IEC 62271(latest version), vertical break horizontal draw out type, manual and motorised spring charging for opening and closing operation, nominal system system voltage: 12 KV, System frequency: 50HZ, Short circuit breaking current: 21KA for 3 sec (min), making capacity 2.5 time of Isc, IAC Protection as per manufacturer in accordance to relevent Standard, Impulse withstand voltage: 75KV, power frequency withstand voltage to earth between poles: 28KV RMS, min 30000 operation at rated current, duty cycle O-0.3sec-CO-3min-CO, electrolytic grade copper 3 phase bus bar with PVC sleeve, CT-03 No with short circuit current capacity as per VCB, CT Ratio: 200/5A/1A, class accuracy: 5P10 , VA Burden: as per design for metering and protection, PT 11KV/110V -01No. Resin cast draw out type, VA Burden as per load of metering, protection, indicators and DC power pack for relay operation, power freq withstand voltage and implus voltage as per VCB, DC power pack for relay operation of appropriate capacity, overcurrent & Earth fault protection shunt trip digital relay of standard makes with necessary wiring & tripping mechanism in each VCB, relay setting -1% to 3200% step size 1%, anti pumping relay for 2CO operation, necessary flag operation indication type of fault all as specified and directed. Note: Contractor shall provide hard/soft copy of all the relevent IS/IEC applicable in above item.

Supply, installation and commissioning of HT 33 KV high tension lightning arrestor (IS :3070) , expulsion type suitable for 33 KV with all fittings of transmission class, discharge capacity 65 Kilo Amps and testing including removing old unserviceable with all fittings, complete all as specified and directed.

Supply, installation and commissioning of HT 33 KV out door gang operated air-break switch 9 insulator rocking type horizontal mounting of 400 Amps rating, complying with IS:9920 (Part I to IV) complete all as specified and directed.