SITC of 2000kVA 11kV/433V Distribution Transformer and allied HT/LT works in NAC II substation inside IIT Madras Campus

Amount

Supply, Erection, Testing and Commissioning of 2000kVA , 11kV/433V mineral oil filled ONAN & OCTC outdoor type Distribution transformer with complete fittings and accessories as per the enclosed Technical Specification and IS 1180 (Part-I):2014, Amendment No:4 , LEVEL-1 .

(i) Supply

(ii) Erection

Supply, Installation, Testing and Commissioning of TPN,4W, 3200A Aluminium sand wich design busduct with suitable IP66 canopy for out side portion for 415V 3 phase 4 wire 50HZ AC supply system Class F insulation ( between transformer LT side and up to the incomer of the MV Panel) of Aluminium busbars complete with required bends, expansion joints, fire barriers , copper flexible etc end connections at both ends, earthing with 2 runs of aluminium earth of size 50x 6mm strips etc including necessary supports from ground level and ceiling level as recommended by Engineer in Charge etc as per specifications as required.

Supplying and Laying of 3C x 240 Sqmm 11kV (E) HT UG Aluminium armoured XLPE Power cable in trench of 50cm wide and 100cm depth including earth work excavation in all soils and sub soils spreading 12 cm thick river sand on top of the cable to cover it completely inside the trench and brick cover protection top of the river sand/cable using burnt bricks and back filling, consolidated in a regular interval of 25cm thick rammed and complying with standard specification. The rate should be inclusive of Cable route markers at regular interval of 50m.

Supplying and Terminating the ends ( indoor Termination) of 3C x 240 Sqmm 11kV (E) HT UG Aluminium armoured XLPE Power cable with suitable lug / Ferrules socket and using necessary jointing materials with RPG make heat Shrinkable Joint Kit.

Supplying and Laying of 2Runs of 4C x 2.5 sqmm LT UG copper armoured XLPE control cable on wall or cable tray with necessary clamps at regular interval as per standard specification.

Removing and Re-Laying of 6Runs of 3.5C x 400 Sqmm LT UG Aluminium armoured XLPE Power cable in trench of 50cm wide and 75cm depth including earth work excavation in all soils and sub soils spreading 6 cm thick river sand on top of the cable to cover it completely inside the trench and brick cover protection top of the river sand/cable using burnt bricks and back filling, consolidated in a regular interval of 25cm thick rammed and complying with standard specification. The rate should be inclusive of Cable route markers at regular interval of 50m.

Supplying and making end termination for following sizes alu. Conductor LT UG cable using suitable compression gland with required copper ferulles / socket and other jointing materials

3.5c x 400 sq.mm ( Alu)

4 C x 2.5Sqmm ( Cu)

Supplying and laying of 9 inches hume pipes including required collars on the excavated trench of 75cm depth for road crossing. The work should be inclusive of breaking the concrete/Bitumen roads and removing of all soils and sub soils up to depth of 75 cm and back filling the excavated soil after laying of hume pipes and consolidated in a regular interval of 25cm thick rammed and complying with standard specification and making the road cutting area in to original position. The unfilled soil has to be transported to a safe location as per the instrtuction of the Engineer In Charge.

Supply , Erection,Testing and commissioning of suitable size extendable floor mounting cubical type following LT Main Panel board suitable for 415V 3ph 4 wire 50Hz AC supply system fabricated in a compartmentalized design from CRCA sheet steel of 2mm thick for frame works and cover with 3mm thick removable gland plate ,cleaning and finishing with 7 tank process for powder coating with siemens grey having extensible type TPN copper alloy busbar of suitable capacity as per the incomer ACB /MCCB/SDF ratings with DMC/SMC busbar suppotrs with short circuit withstand capacity of 31MVA / 1Second , bottom base channel of 100mmX 50mm X 5mm. .The In/Out going Cable entry should be from the rear side of the panel.

BUS BARS

Bus bars will be electrolytic copper , air insulated , R,Y,B, N(Black) PVC sleeved capable of carrying full load current for all the 3 phases and neutral continiously. The current density of copper shall be designed for 1.2A per sqmm. The bus chamber should have proper air ventilators.

EARTHING

2 separate run of 25 x 3 mm copper earth bus painted in green colour should be provided all along the panel and connected to the main grid. Interconnectios should be taken to metering chamber, MCCB's, ACB's, FSU's etc sothat all current carrying components are effectively earthed.

ADDITIONAL SCOPE OF WORK

The scope of work includes minor civil works like breaking of concrete floors ,construction of masonary trench and suitable MS channels for the proposed panel as per the instruction from the Engineer in Charge.Necessary Panel drawings , QAP and GTP have to be approved by the Engineer incharge before fabrication.

PANEL I ( To be installed at NAC II Substation)

Incomer

3200 FP ACB 75kA -1No (MDO independent manual spring closing mechanism-1No, microprocessor release for o/c , e/f and short circuit protection-1No, breaker ON/OFF/Trip indication Lamps) .

Outgoing

2000A TP ACB 50kA (MDO independent manual spring closing mechanism-1No, microprocessor release for o/c , e/f and short circuit protection-1no, breaker ON/OFF/Trip indication Lamps with 96sqmm digital Ammeter with required CT's)- 1 set

Same size of 3200A Aluminium bus bars for R,Y,B and N

The incomer ACB and the oter outgoing ACB's should be provided with 3 phase indication lamps with toggle switch-1set, microprocessor based digital multi function meter with communication port( facility for active and reactive power measurements ) with required CTs and control fuses etc-1set .Necessary Spreaders / extended copper bus bars of suitable rating with required holes should be provided for the cable and bus bar terminations.The handle should be pad lockable type in both ON/OFF positions.The work should be inclusive of removal of existing LT panel including cable and re-install the panel/ re -termination of cables after panel alteration works.

Supply, Erection, Testing and Commissioning of Cast iron pipe and copper plate earth as per IS - 3043 - 1987 including excavation of soil and sub soil , back filling with equal layers of salt and charcoal and the excavated soil , ramming, consolidating, Masonry construction, heavy duty cover slab etc. The CI pipe should be 100mm dia and 3mt long bolted with 600 x 600 x 3 mm thick copper plate at the bottom. 2R of 50 x 3 mm copper flats should be taken from the copper plate to the top of the CI pipe and clamping with suitable clamps

Earthing the installation with the following sizes of earth wires. The rate shall be inclusive of spacer clamp for main earth flat suitable clamping with the MS flats for earth wires including crimping of socket etc.or laying below 0.5m from ground level including earth work excavation and refilling the excavated soil.

50 x 10 mm GI Flat

25 x 5mm GI flat

Safety Lisence for the New installations for HT/LT equipments by submitting necessary as built drawings and documents to CEA after completion of all works.

KEVIN ELECTRICALS PVT LTD

ESSENN POWER CONTROLS PVT LTD

GRENEL POWERS PVT.LTD.