220kV Substation Taliparamba - Dismantling and Erection of 110/11 kV Transformer in connection with Capacity enhancement by replacing 10 MVA Transformer with 20 MVA Transformer Phase-II

Collecting from store or substation wherever available tools and materials such as jacks pulling and lifting machines,rails,sleepers, plies, ropes, empty drums, dummy plates, bolts and nuts gaskets, etc. including loading and unloading in department vehicle and accompanying and returning the same after completing the work as per the direction of departmental officers.( Only if required)

Dismantling interconnection between equipments using ACSR Moose/ Kundah/ wolf Single conductor at both ends with compressed/ bolted ends including uncoiling and cutting of conductor as per the direction of departmental officers.

Dismantling the radiator, conservator tank, EHV bushing turret, connecting pipes, cooling fans, meters, breathers, Buchholz relays of a 110/11KV or 66/11KV 12.5 / 10 MVA transformer after draining the oil to the required level and blocking the bushing turret, radiator pipe etc. wherever necessary as per the direction of the departmental officer, safely without damaging any equipment and observing all safety precautions.

Dismantling of 1 No. 33kV CT/PT/ 110kV NCT & RVT /NCT (852/36kV) from the already erected structure of above 1.5m height , leading to storage place carefully keeping at vertically not allowing tilting from vertical position more than the specified angles, keeping lines and levels as per the direction of the departmental officers, including all labour charges, hire charges of tools & tackles etc

Dismantling of 1 No. 11kV CT/PT/ 11kV NCT from the already erected structure of above 1.5m height , leading to storage place carefully keeping at vertically not allowing tilting from vertical position more than the specified angles, keeping lines and levels as per the direction of the departmental officers, including all labour charges, hire charges of tools & tackles etc.

Dismantling of 1 No. 11kV LA (Station type) / 11kV Post insulator from the already erected structure of above 1.5m height , leading to storage place carefully keeping at vertically not allowing tilting from vertical position more than the specified angles, keeping lines and levels as per the direction of the departmental officers, including all labour charges, hire charges of tools & tackles etc.

Dismantling already erected yard structure including columns and beams as per the direction of the departmental officers, including all labour charges, hire charges of tools & tackles etc

Pulling the power transformers of weight 20T to 30T, on the rail track, travelling for a distance up to 30M, using sleepers, rails, jacking, pulling and keeping ready for placing on the correct plinth as per the direction of departmental officers at site, safely without damaging any equipments and observing all safety precautions

Turning the transformer of weight 20T to 30T,up to 90 degree using required tools safely and taking all precautions as per the directions of the departmental officers ( only if it is absolutely necessary and where departmental crane is not available)

Dismantling the transformer / feeder C&R panels, 110V battery charger, OLTC cubicle, LT panel as per the direction of departmental officers.

Termination of cables in panel by using cable glands of fixing the cable rigidly by any means as per direction of departmental staff at site charges include for providing necessary suitable hole in the gland plate etc. for 4/2 core 2.5 sq mm cable/4/2 core 4 sq mm cable (using gland of size 16-22mm).

Uncoiling 20/19 core 2.5sqmm, 12 core 4 sqmm control cable (Armoured or unarmoured) from cable drums cutting to required length and laying through trench/pipe/cable tray grouping the same neatly using cable tie and carefully including for providing loop wherever necessary and providing cable marker at both ends of cable as per direction of departmental staff at site.

Doing termination of all sizes of PVC insulated copper control cable 2.5 mm², pealing, providing number and letter ferrules in the wire, stripping ends, crimping with suitable lugs and connecting to the terminals in the panel board and marshalling kiosk etc., neatly and carefully including cost of copper sockets and ferrules as per the direction of Departmental Officers at site.

Doing termination of all sizes of PVC insulated copper control cable 4.0 mm², pealing, providing number and letter ferrules in the wire, stripping ends, crimping with suitable lugs and connecting to the terminals in the panel board and marshalling kiosk etc., using cable tie and cable tie neatly and carefully including cost of copper sockets and ferrules as per the direction of Departmental Officers at site.

Providing interconnection between equipments using ACSR Moose/ Kundah/ wolf Single conductor at both ends with compressed/ bolted ends including uncoiling and cutting of conductor as per the direction of departmental officers.

Laying 1 x 500 sq mm XLPE cables in trench including drawing through pipes wherever necessary .

Assembling the 20MVA,110/11KV transformer with all accessories in complete shape and filling oil if required including arresting the movement of the transformer by locking as per the direction of departmental officers.

Loading the empty oil tank of capacity 10000/15000 Ltr. From the place of its storage using wooden blocks, lever etc. and moving the tank to a distance of 10M from switch yard then loading the same to the dept. vehicle using chain pulley etc. carefully tying the tank in vehicle accompanying the vehicle up to .................. substation, removing ties and unloading the tank carefully by the use of wooden blocks rails, chain pulley etc. again moving the tank to a distance of 50M, for safe storage.

Loading the 6000/5000litre/hr.or above transformer oil filter plant to lorry using tripod, chain block, pulley block, rope etc., after pulling it to the convenient position for lifting and fixing it firmly for safe transportation to the location as directed by department officers, unloading the same without causing any damage and placing it carefully at convenient place etc. complete as directed by department officers at site wherever required.

Pulling the power transformers of weight above 30T to 40T, on the rail track, travelling for a distance up to 30M, using sleepers, rails, jacking, pulling and keeping ready for placing on the correct plinth as per the direction of departmental officers at site, safely without damaging any equipments and observing all safety precautions.

Turning the transformer of weight above 30 to to 40T,up to 90 degree using required tools safely and taking all precautions as per the directions of the departmental officers ( only if it is absolutely necessary and where departmental crane is not available)

Covering the transformer with tarpaulin using ropes, bamboos etc.

Giving three phase connection to the filter unit from the supply mains using cable including fitting three numbers of fuse units near the filter unit and laying the cable from control room to filter unit and trial run of filter unit after giving connection etc. complete. ( Only if found absolutely necessary and where departmental staff is not available )

Filling the oil in to 10000-15000 Ltr. capacity tank after bringing the new oil barrel from its place of storage and circulating the same to obtain the necessary value.

Hot oil circulation after draining oil from transformer, evacuating the transformer by using vacuum pump after providing LT connection to the pump , connecting the hose to transformer, operating carefully and continuously for attaining sufficient vacuum and keeping in vacuum for 24 hours and operating filter unit carefully and continuously for 24 hours except halt due to poor voltage and trouble in filter plant etc complete as per the direction of dept. officers.

Disconnecting the power connections to the filtering plant/ vacuum pump, coiling the cable, disconnect the hoses and coiling them and folding and removing tarpaulin used for covering the transformer, moving the filter plant and vacuum pump to a distant place as directed by the department staff. ( where departmental staff is not available and is found absolutely necessary).

Drilling holes in yard structure

Cutting of steel angle in yard structure erection

Laying of departmentally supplied GI strip/Copper strip of suitable size including cleaning and neatly bending of strips ,cutting, removing of metal/earth in the yard and burying earth strip to the required depth re-doing the yard metalling as per the direction of the departmental officers.

Welding overlapping joints of 50x6mm GI strip with 50mm long, 6mm thick welding on all three sides after doing 2 Nos. bolted joints at the centre as specified after cleaning the surface. Charges includes hire charges of DC arc welding set, current charges, cost of low hydrogen content DC arc welding electrodes( No.E7018) cost of anti corrosive paint etc. complete.

Welding one end of the bended GI strip of size 50x6mm with the riser of the already laid earth mat, welding 150mm in length, 6mm thick on both sides & end of the strip and connecting other end with nuts & bolts if required as per the directions of the department officers. Charges includes hire charges of DC arc welding set, current charges, cost of low hydrogen content DC arc welding electrodes(No.E7018) cost of anti corrosive paint etc. complete.

Welding one end of the GI strip 50x6mm with the structure with a welding length of 50mm & 6mm thickness on both sides & end of the strip and connecting other end with bolts & nuts if required including hire charges of DC arc welding set, current charges, cost of low hydrogen DC arc welding electrodes (No.E7018) cost of anti corrosive paint etc. complete.

Fabrication of structures for erecting equipments. The GI & MS angles will be supplied departmentally

Erection of yard structures and assembling of columns and beams using bolt and nut including punching of holes.

Conveying to the erection site and erecting carefully 1 No. 33KV CT/PT/110KV NCT & RVT/NCT(52/36kV) on the already erected structure after opening of crates at the place of storage leading to site carefully keeping at vertically not allowing tilting from vertical position more than the specified angles, keeping lines and levels as per the direction of the departmental officers, including all labour charges, hire charges of tools & tackles etc.

Erection of 1 No. 11KV CT/PT/11KV NCT on the already erected structure after opening of crates at the place of storage leading to site carefully keeping at vertically not allowing tilting from vertical position more than the specified angles, keeping lines and levels as per the direction of the departmental officers.

Erection of 1 No. 11KV LA (station type ) /11KV Post insulator on the already erected structure after opening of crates at the place of storage leading to site carefully, keeping lines and levels as per the direction of the departmental officers.

Doing outdoor/indoor cable termination of 1x500 mm2 11KV XLPE cable very carefully observing directions of manufactures and departmental staff including crimping of socket

Mounting one 1 x 500 mm2 outdoor / indoor cable termination of structures very carefully without causing any damage to the drilling holes wherever necessary as directed by the departmental officers

Unpacking the transformer / feeder C&R panels, 110V battery charger, OLTC cubicle LT panel at the place of storage transporting to the place of erection and erecting after providing foundation bolt keeping to lines and levels as per the direction of departmental officers.

Uncoiling 12/7/6 core 2.5 sq mm control cable (armoured and unarmoured) from cable drums and cutting to required length and laying through trench/pipe/cable tray grouping the same neatly using cable tie and carefully including for providing loops wherever necessary and cable marker, at both ends of cable as per direction of departmental staff at site.

Uncoiling 4/2 core 2.5sqmm control cable (armored or unarmored) from cable drums and cutting to required length and laying through trench/pipe/cable tray neatly and carefully including for providing loops wherever necessary and cable marker at both ends of cable as per direction of departmental staff at site.

Uncoiling 5/4/3/2 core 4sqmm control cable(armoured or unarmoured) from cable drums and laying through trench/pipe/cable tray neatly and carefully including for providing loops wherever necessary and cable marker at both ends of cable as per direction of departmental staff at site.

Fixing all type of terminal connecting strip with terminal connectors in the marshalling box or panel board wherever necessary (terminal connecting strip will be supplied departmentally ) charges includes for providing necessary suitable hole etc complete as per direction of departmental staff at site.

Termination of cables in panel by using cable glands of fixing the cable rigidly by any means as per direction of departmental staff at site charges include for providing necessary suitable hole in the gland plate etc. for 20/19 core 2.5sqmm cable/12 core 4 sqmm cable (using gland of size 28-32mm)

Termination of cables in panel by using cable glands of fixing the cable rigidly by any means as per direction of departmental staff at site charges include for providing necessary suitable hole in the gland plate etc. for 12/7/6 core 2.5 sqmm cable (using gland of size 25mm).

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