WORK OF REPLACEMENT OF 100 MVA TRANSFORMER AND ERECTION OF 160 MVA TRANSFORMER AT 220 KV SUB-STATION UNDER ELECTRICITY TRANSMISSION DIVISION SAMBHAL

Amount

The following works are to be carried out at 220KV S/S, Sambhal under ETD- Sambhal.

Opening of Jumpers dismantling of 03 Nos. 120 KV LA with structure and their re-erection at 220 KV S/S Sambhal.

Removal of old earthing of 100 MVA transformer body neutral marshaling box driving mechanism RTCC panel 120 KV LA and opening of electrical connections & all jumpers at 220 KV S/S Sambhal.

Draining of oil up to required level from 100 MVA T/F tank and its conservator radiator and pipe lines at 220 KV S/S Sambhal into 209 Ltr. Drums and their storage at proper safe place as directed by engineer in charge.

Dismantling of Emulsifier pipe-lines and accessories of old Emulsifier system from 100 MVA T/F and its shifting g up to designated place as per directions of supervising engineer at sub-station.

Dismantling of 100 MVA transformer conservator tank oil pipe lines all bushing turret fan motors marshaling box RTCC Panel etc. to complete the job satisfactory including proper stacking all T & P and labour etc. shall be arranged by the contractor at his own cost.

Shifting and placement of all dismantled accessories such as radiator conservator tank and other accessories to store/open switch yard and proper staking.

Shifting of main tank of 220/132 KV 100 MVA transformer form plinth up to 20 Meters distance including turning of tank if required including all T&P and all other works required to complete the job satisfactory.

Additional Shifting 30 Mtr. @ 5mtr/Job

Shifting of 160 MVA T/F with accessories from unloading point to plinth with the help of rail pulling device sleeper etc. up to distance of approx..20 Mtr. Including turning if required at 220 KV S/S Sambhal All T&P labour etc shall be arranged by the contractor at his own cost.

Additional Shifting 20 Mtr. @ 5mtr/Job

Loading transformer and unloading of 10/20 KL oil tank to erection site from any sub-station wherever tank is available (within 100 Kms.) it’s proper cleaning and taking back to storage site after completion of work.

Filling the transformer oil in 10 KL oil tank and its centrifuging up to required BDV (centrifuging machine shall be provided by the contractor)

Providing of dry air at the time of opening of blanking plate for erection of 160 MVA transformer main tank and filling of dry air of dew point 400C or better for completion of work the work shall include connecting pipe as required for measuring due point values of dry air.

Complete erection of 160 MVA T/F at 220 KV S/S Sambhal by erection radiators headers conservator tank HV/LV bushing all pipe lines buchholz relay OSR PRV erection of marshaling box driving mechanism cooling fans oil pumps & all other links etc. complete in all respect & attending the oil leakage if any after putting the transformer in vacuum for 24 Hrs. & all other associated work to complete the job satisfactorily as per instruction manual or direction of the engineer.

Complete evacuation of from 160 MVA transformer main tank and filling of dry air of dew point 400C or better in vacuum up to pressure of 0.25 kg/CM2 and then aging evacuating the transformer tank after required time interval (approx. 12/24 hrs.) using centrifuging machine the work shall include connecting pipe of machine as required measuring due point values of dry sir after every cycle till the required value is achieved.

Creating the vacuum inside the transformer tank & Maintain it for 24 hrs. filling the centrifuged transformer oil step by step in 160 MVA Transformer..

Centrifuging of complete transformer oil (approx. 50 KL) in transformer main tank by connecting centrifuging machine to be provided by the conservator and taking the BDV of the oil & I.R values of T/F periodically till the required value is achieved as per direction of supervising engineer (Centrifuging machine Shall be provided by the conductor free of cost.)

New Jumpring of 220/132 KV LA HV & LV bushing with zebra conductor.

Making of delta earthing for 160 MVA T/F consisting of fabrication of delta set with 03 Nos. 40mm/36mm dia size 03 Mtrs. Long electrodes its placing inside the ground and connecting all the three electrodes with 75x10 mm M.S flat 700 mm deep with neutral bushing of transformer and connecting with X & Y axis of main earth mat of sub-station

Connecting of control cables of 160 MVA Transformer with laying of cable and termination in between WTI OTI buchholz relays PRV cooling fans pumps OLTC marshaling box RTCC panel etc. with proper ferruling as per drawing.

Installation and Emulsifier of 160 MVA Transformer at 220 KV Sub-Station Sambhal

Supply & laying underground or upper ground as required of different size GI pipe ‘B’ Class Jindal/tata make for fire detection water pipe line as per IS specification (IS code-1239) as per Drawing enclosed complete with elbowtee socket reduce, nuts &bolts with details as below with anticorrosive treatment or painting as where required along with fabrication & fixing of L & U shape support with associated work to complete the job in all respect.

Supply & installation of 80 NB MS pipe B class Jindal/Tata make for making support running of water/air pipe line including providing flange on bottom & its proper grouting with fastener nut, bolt with anticorrosive treatment of painting as where required.

Supply & installation of flanges as per IS-1538 of different size as per drawing work include proper butt welding with pipe and proper packing and coupling with nut & bolt & fastener as required.

Supply & installation & commissioning of high velocity water spray nozzles flow capacity 305Kg/cm2 spray angle 9.

Supply & installation & commissioning of Quartzite bulb detectors (QBD) operate as 76 C0 sensing at rated temperature for actuation of the element 10/12 sec.

Supply installation & testing commissioning of fixed different switch (Danfoss/indfoss make) type pressure switch range 1-10 Kg/Cm2.

Pressure gauge as per IS specification IS Code-3624 accuracy +5%

Dismantling & installation including repairing of deluge valve NRV by replacement of gasket & repairing of sheet.. Repairing of alarm electrical connection of pressure switch including cable etc.

Laying underground or upper ground as required of I 00 NB & 150 NB old & use including modification as required MS pipe · B' class provided by deptt. For fire water pipe line support as per IS specification (IS Codc-1239) as per drawing enclosed complete with elbow Tee, Socket reduce nuts & bolts (provided by deptt.) with detail as below with anticorrosive treatment or painting as where required along with fabrication & fixing of L&U shape support with associated work to complete the job in aII respect.

Laying underground or upper ground of different size old & used including modification as required GI pipe 'B' class (provided by the deptt.) for fire detection/water pipe line as per drawing enclosed completed with elbow Tee. Socket reduces (provided by deptt.) with anticorrosive treatment or painting as where required along with fabrication &fixing of L&U shape support with associated work to complete the job in all respect.

Re installation of old & used including modification as required of80NB MS pipe '8' class (provided by deptt.) by for making support running of water air/ pipe line including providing flange on bottom & its proper grouting with fastener nut, bolt with anticorrosive treatment or painting as where required

Re installation and commissioning of 150 NB Deluge- valve as per required of transformer which includes servicing of related fittings like 150 NB T- strainer I No. Gate valves 2 Nos. NRVS another related parts of deluge valve.

Perfect Power Transformer Associates

Meena Elect & Engg. Works

Gupta Elect and Engg Works