Erection and Commissioning of 3.3kV Switchboard at 110kV Substation of FACT-UC

Amount

Dismantling and transportation of existing old 3.3kV switchboard. Dismantling of old panels is done section wise as per the instruction of the Engineer in charge. The scope of work includes rack out of 3.3kV bulk oil/air circuit breakers from panels, properly marking and disconnecting power cables/ control cables/ earth cables/ motor heater cables of panels, disconnecting inter panel power/ earth bus bars, disconnecting inter panel control wirings, removing inter panel mechanical connections, removing foundation bolts from MS channel/ MS plate/ Concrete floor, removing foundation channels if necessary, covering exposed live panels/busbars with suitable protective material/ insulations ,transporting the panels/ foundation channels/ foundation plate and circuit breakers from first floor of 110kV substation to a temporary location as directed by the Engineer-in charge. Contractor should arrange necessary tarpaulin sheets to protect the panel from dust and rain till completion of removal of critical items like bus bars, current transformers, switches, indication lamps, relays atc. All removed items should be handed over to technician in charge and panels should be transported to scrap yard within 1000m inside FACT premises. The crane, lorry, lifting tackles etc required for handling and transportation of switchboard panels from work site to scrap yard shall be arranged by the contactor. Fork lift required for shifting old panel from first floor to the ground floor of the substation shall be arranged by the contractor. Existing old switchboard comprises a total of 20 number of vertical sections. Dismantling of old 3.3kV panels has to be done section wise as per the instruction of Engineer in charge. At the initial stage, all the vertical panels in bus section 2 including bus coupler has to be dismantled. Dismantling of rest of the old panels should be done after the completion of erection and charging of new 3.3kV switchboard.

Transportation & erection of new 3.3kV Switchboard. The scope of work includes loading/ unloading, transportation of new 3.3kV panels from stores to first floor of 110kV substation building without causing any damage to the panels, handling at site, unpacking, checking of components of supply equipment/items as per BOM, listing and handing over of list of short supplied items to site-in- charge. Fixing foundation channels, fixing new MS C-channels of appropriate size, drilling foundation bolt holes in the MS channels/ MS plate/ concrete, levelling the foundation floor for placing the new panels, grouting, fixing the panels on the foundation MS channels/ MSplate/ concrete, minor floor chipping as per requirement, aligning all panels properly, tightening the foundation bolts, inter-connecting all panels, inter-linking power and earth bus bars, checking positioning/alignment and tightness of bus bars and providing cable supports using MS angle of minimum size 65x65x5mm. Contractor shall supply the MS C-channels of appropriate size and MS angle of minimum size 65x65x5mm required for successful completion of the work. The MS C-channels and angles shall be painted with two coats of anti-corrosive epoxy paint (grey colour) over two coats of suitable primer. Products of M/s. Asian Paints, Berger Paints, Kansai Nerolac Paints & Shalimar Paints alone will be accepted. Product literature of the manufacturer shall be furnished to the Engineer-in charge and the product to be used shall get approved before starting the work. The epoxy primer shall be Zinc Phosphate primer and thinner used for the work shall conform to the brand specified by the manufacturer in the product literature. Bolts, nuts, washers, Epoxy primer, Epoxy paint, Sand, cement, brick, etc. for successful completion of the work shall be arranged by the contractor. The crane, lorry, lifting tackles, etc. required for handling and transportation of switchboard panels from Stores to work site shall be arranged by the contractor. The scope also inculdes providing necessary arrangements for removing temporary MS plate flooring/beam for uplifting new panel through the provision /opening in the existing substation building. After completion of work, floor plates/ beams have to be placed back to its original position. Fork lift required for lifting panel from ground floor to the first floor of the substation shall be arranged by the contractor. The new switchboard comprises a total of 17 number of vertical sections.

Concrete core cutting with floor chipping as per the requirement at appropriate locations of floor for cable entry required for each vertical section of the entire switchboard.

Laying/Re-routing of existing 3.3 KV, armoured PVC/XLPE cables. The scope of work includes Laying/Re-routing of existing 3.3 KV, armoured cables of size from 3Cx300 sq.mm up to 3Cx400 sq.mm in a single panel through cable trenches, risers, walls and clamping/tying the cables at a regular interval of 500 mm. All items required for the work shall be arranged by the contractor. Number of power cables in a single panel board is attached as Annexure-1.

Laying/Re-routing of existing LT, armoured control cables. The scope of work includes Laying/Re-routing of existing LT, armoured control cables of size up to 19 core, 2.5/4 Sq.mm in a single panel through cable trenches, risers, walls and clamping/tying the cable at a regular interval of 500 mm. All items required for the work shall be arranged by the contractor. Number of control cables in a single panel board is attached as Annexure-1.

Laying/Re-routing of existing armoured earth cables. The scope of work includes Laying/Re-routing of existing armoured earth cables of size up to 1Cx600 Sq.mm through cable trenches, risers, walls and clamping/tying the cable at a regular interval of 500 mm. All items required for the work shall be arranged by the contractor.

Laying new 3.3 KV, 3Cx400 sq.mm armoured cable. The scope of work includes loading/unloading, transporting new 3.3 KV, 3Cx400 sq.mm armoured cables from stores/cable yard to 110kV Substation, handling at site, laying through cable trenches, risers, walls and clamping/tying the cable at regular interval of 500 mm. Supply of Cables are under FACT scope. All other items required for the work shall be arranged by the contractor.

Laying new armoured, LT cables. The scope of work includes loading/unloading, transporting armoured, LT cables of size up to 19 core, 2.5/4 Sq.mm from stores/cable yard to 110kV Substation, handling at site, laying through cable trenches, risers, walls and clamping/tying the cable at a regular interval of 500 mm. Supply of Cables are under FACT scope. All other items required for the work shall be arranged by the contractor.

Straight joining 3.3 KV, 3Cx400 sq.mm armoured cables. The scope of work includes carrying out straight joining of 3.3 KV, 3x400 sq.mm armoured cables using compound/heat shrinkable type straight through joint kits as per instruction of Engineer in Charge. Straight Joint Kit and all necessary tools and items required for the work shall be arranged by the contractor. Acceptable Makes for straight through jointing kit:Raychem/ 3M/ Denson.

Glanding and indoor end termination of 3.3 KV armoured cables. The scope of work includes providing holes at gland plate, concrete chipping/cutting, making holes in concrete ,carrying out glanding and indoor end termination of 3.3 KV, XLPE / PVC cables of size from 3Cx300 upto 3Cx400 sq.mm using proper glands, lugs and heat shrinkable end termination kit as per instruction of Engineer in Charge. Cables shall be properly clamped to the supporting MS angle. All the items required for the work shall be arranged by the contractor. Acceptable Makes for heat shrinkable end termination kit: Raychem/ 3M/ Denson.

Glanding and termination of armoured, LT cables of size up to 19 core, 2.5/4 Sq.mm of size. The scope of work includes providing holes at gland plate, concrete chipping/ core cutting, making holes in concrete if required, carrying out glanding and termination of armoured, LT cables of size up to 19 core, 2.5/4 Sq.mm of size using proper glands and lugs as per the drawing submitted by the panel manufacturer. Termination including lugs, glands etc. and all necessary tools and items required for the work shall be arranged by the contractor.

Inter-panel wiring. The scope of work includes laying, wiring, glanding, termination and testing of control cables for DC Aux. supply, AC PT supply, Trip status to common annunciator, interlocks etc. in a single switchboard of newly erected 3.3KV panel using proper glands and lugs as per the drawing submitted by the panel manufacturer. Ferrules shall be provided in the wires. Ferrule printing machine shall be arranged by the contractor.The scope also includes wiring of 110V DC and 230V AC supply cables from Bus coupler panel to rest of the panels. Cables will be supplied by FACT. All other items required for the work shall be arranged by the contractor.

Supply of heat shrinkable indoor end termination kit suitable for 3.3 KV , 3X 400 sq. mm armoured cable. Acceptable Makes: Raychem/ 3M/ Denson.

Supply of heat shrinkable indoor end termination kit suitable for 3.3 KV , 3X 300 sq. mm armoured cable. Acceptable Makes: Raychem/ 3M/ Denson.

Supply of heat shrinkable straight joining kit suitable for 3.3 KV , 3X 400 sq. mm armoured cable. Acceptable Makes: Raychem/ 3M/ Denson.

Supply of heat shrinkable straight joining kit suitable for 3.3 KV , 3X 300 sq. mm armoured cable. Acceptable Makes: Raychem/ 3M/ Denson.

Supply of skilled workers having valid wireman Licence for commissioning assistance , for attending miscellaneous electrical works, cable jointing etc. on 8 hours shift basis, as directed by Engineer-in-charge.

Supply of unskilled workers for attending miscellaneous works such as cleaning of panel room, transportation of materials etc. on 8 hours shift basis, as directed by Engineer-in-charge.

Dinu Electricals