Annual Maintenance contract for attending complaints and minor project works in substation and cables in IIT Madras campus for the year 2025-2026

Amount

SUBSTATION & CABLES

Attending day to day maintenance of HT/ LT equipments, break down work, fuse of calls, emergency faults, major break down inside the entire campus on round the clock service on shift duty work with the following designated staff. (Shift Duty: 3 shifts/day) 1 no Electrical Supervisor with valid C License and 1 No Electrician with valid B license and 1 No helper in each shift and total three shifts in a day. The Electrical Supervisor , Electrician and helper should have experience in maintenance of Substations up to 33kV Supply System in shift duty.

In Addition to the above one sweeper has to be posted in General shift to clean the main substation and the other unmanned substations as instruted by the Engineer in charge .

Supplying and Terminating the ends of the following 11kV XLPE sheathed alu stranded conductor armored under ground cable with suitable lug / Ferrules socket and using necessary jointing materials with RPG make heat Shrinkable Joint Kit.

3C x 240 Sq.mm

3C x 300 Sq.mm

Supplying and making Straight Through Joint for the following 11kV XLPE sheathed alu stranded conductor armored under ground cable with suitable lugs/Ferrules socket and using necessary jointing materials with RPG make heat Shrinkable Joint Kit.

3C x 240 Sq.mm

3C x 300 Sq.mm

Supplying and replacing of following ratings of the Fuse links suitable for the existing distribution pillar-boxes/SFU/FSU. The rate should be inclusive of making holes on the existing copper bus bars and removal of terminations for the existing cable if necessary when attending fault.

63 A DMC HRC Fuse Link

125A DMC HRC Fuse Link

250A DMC HRC Fuse Link

400A DMC HRC Fuse Link

Removing the following sizes LT UG cable of size up to 3.5c x400 sq.mm from the trench of 75cm depth including earth work excavation in all soils and sub soils for identifying the faults and relaying the same cable / other cable in the trench, sand filling and brick cover protection of the cable using existing burnt bricks/ removed RCC troughs etc and back filling. consolidated etc as required.

Supplying& Laying of following sizes PVC XLPE insulated alu. Conductor armored 11kV HTUG cable in a trench of 50cm wide and 100cm depth including earth work excavation in all soils and sub soils spreading 6cm thick river sand at the bed of the trench and brick cover protection top of the cable using burnt/cement bricks and back filling, consolidated in a regular interval of 25cm thick rammed and complying with standard specification.cable identification on both side with Alu cable tags.

3C x 185 sqmm XLPE insulated armoured aluminium cable.

3C x 240 sqmm XLPE insulated armoured aluminium cable.

3C x 300 sqmm XLPE insulated armoured aluminium cable.

3C x 400 sqmm XLPE insulated armoured aluminium cable.

Supplying& Laying of following sizes PVC XLPE insulated alu. Conductor armored LTUG cable in trench of 50cm wide and 75cm depth including earth work excavation in all soils and sub soils spreading 6cm thick river sand at the bed of the trench and brick cover protection top of the cable using burnt bricks and back filling, consolidated in a regular interval of 25cm thick rammed and complying with standard specification. ( consider DWC/ HDPE pipes up to 70 sqmm Alu/Cu Armmoured cable) (consider Sand and Brick cover protection for above 70 Sqmm and up to 400 Sqmm Alu/Cu Ar UG cable )

4c x 10 sq.mm XLPE insulated armoured aluminium cable.

3.5c x 50 sq.mm XLPE insulated armoured aluminium cable.

3.5c x 70sqmm XLPE insulated armoured aluminium cable.

3.5c x 150 sq.mm XLPE insulated armoured aluminium cable

3.5c x 240 sq.mm XLPE insulated armoured aluminium cable.

3.5c x 300 sq.mm XLPE insulated armoured aluminium cable.

3.5c x 400 sq.mm XLPE insulated armoured aluminium cable

4 core x 10 sqmm XLPE insulated armoured Copper cable

4 core x 25 sqmm XLPE insulated armoured Copper cable

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

4c x 10/16/25 sq.mm

3.5c x 50 sq.mm

3.5c x 70sqmm

3.5c x 150 sq.mm

3.5c x 240 sq.mm

3.5c x 300 sq.mm

3.5c x 400 sq.mm

Supplying and making straight thro cable joint for following sizes aluminium or copper Conductor LT UG cable using Heat Shrinkable /cast resin materials ( M-Seal-3M or RPG) with required copper ferulles / socket and other jointing materials.

4 core 6 or 10 sq.mm ( cast resin)

3.5 core 50 sq.mm ( cast resin)

3.5 core 70 sq.mm ( cast resin)

3.5 core 150 sq.mm ( Heat Shrinkable)

3.5 core 240 sq.mm ( Heat Shrinkable)

3.5 core 300 sq.mm ( Heat Shrinkable)

3.5 core 400 sq.mm ( Heat Shrinkable)

Labour charges for making temporary connections to pump motors / streetlights / Residential buildings in case of existing cable failure by laying copper / aluminium wires from the nearest source of supply. (Necessary wires has to be supplied by the contractors and removed after making permanent connections)

Supplying and fixing of the following MCCB's in the existing MV panel with necessary incoming and outgoing connections without enclosure and including extended bars /wires if required/ terminal spreaders.

200 A FP MCCB,36 KA Adjustable thermomagnetic release

250 A FP MCCB, 36 KA with Adjustable Thermal and Magnetic release

400A TP MCCB,35 KA with Adjustable thermomagnetic release

630A FP MCCB,50 KA with Adjustable thermomagnetic release

800A FP MCCB,65 KA with Adjustable Thermal and Magnetic release / Ajustable overload /Adjustable Short Circuit

250A FP MCCB,50 KA Adjustable Thermal and Magnetic release with enclosure

TAP OFF Box with 63A 4P 25kA MCCB

TAP OFF Box with 125A 4P 25kA MCCB

TAP OFF Box with 200A 4P 35kA MCCB

Earthing with copper earth plate 600x600x3mmthick including 2 Runs of 25 x 3 mm copper flat between the bottom of the plate and the clamp fixed on the top of the GI pipe , funnel etc and providing masonary enclosure with cover plate having locking arrangement and watering GI pipe of 2.7m long etc with charcoal/coke/salt and salt as required.

Earthing with GI earth plate 600x600x6mmthick including 2 Runs of 25 x 6 mmGI flat between the bottom of the plate and the clamp fixed on the top of the GI pipe , funnel etc and providing masonary enclosure with cover plate having locking arrangement and watering GI pipe of 2.7m long etc with charcoal/coke/salt and salt as required.

SITC of Chemical Earthing -copper bonded solid rod 25mm dia earth electrode with ,3 metre length with 50Kg high conductive earthing compound including all acessories and providing HDPE round earth pit chamber and cover (300MMx350MM) with cover plate having locking arrangement as instructed by engineer incharge.(make: Ashlok).

Concrete earth chamber with cover plate inner size 350X350X350 mm including excavation and all masonary works. The work should be inclusive of white washing the masonary pedastals , paint marking for the earth values, date of testing done , due date for the next test and pit number on the enclosures and also inside the earth pit.

Supplying and laying of following size earth flats at 0.50 mt below the earth including soldering/welding as required

Single run of 16 sqmm multistranted copper wire in a suitable PVC pipe and clamps

25 x 5mm copper flat

25 x 5mm GI flat

50 x 6 mm GI Flat

Supplying and replacing of 110V AC/DC indication LED lamps as instructed by the Engineer incharge.

Supplying and replacing of 220V AC indication LED lamps as instructed by the Engineer incharge.

Testing of earth electrodes using necessary testing equipment and improve the earth by excavating the soil and sub soil and refilling the same with alternate layer of charcoal/coke and salt if required. The values are to be entered in a seperate register and submitted to the Engineer incharge . The work should be inclusive of replacement of bolts and nuts, white washing the masonary pedastals , paint marking the earth values, date of testing done , due date for the next test and pit number on the enclosures and also inside the earth pit.

Removing the existing LT panel with bus coupler from the foundation by removing the existing LT UG cable feeders of size varying from 70 to 400 sqmm (App. 12 terminations / Panel) and transport the LT panel to the other substation / Godown inside the premises.

Erection, testing and commissioning of the LT panel with Bus coupler on the existing trench with necessary channels. L angles, civil works, chipping and grouting etc. The rate should be inclusive of earthwork for removing the existing LTUG cable with suitable glands and sockets ( app 12 terminations/ panel with cable size varies from 70 to 400 sqmm) the tenderer should inspect the site before quoting.

Supplying and replacing of silica Gel for the Power/ Distribution transformer breathers

Supply and fixing of Breather filled with silica gel and complete accessories for Power/ Distribution transformer breathers

Supplying and replacing of mineral oil suitable Power/ Distribution transformer as per IS 335/1993

Painting of MV Panel Board by scrapping the Board using necessary scrapping material and painted with two coats of siemens grey colour enamel paint .Numbering of each timer box& in/out going cable identification for individual feeders on the door ( approx 200 letters @ 1 inch Size per Panel Board ) has to be done as instructed by the Engineer Incharge. The rate should be inclusive of white washing the pedastal.

Supply of additional manpower as and when required (Unskilled 2 persons). Rate quoted in this item will not be included for considering L1 (RATE ONLY)

ESSENN POWER CONTROLS PVT LTD (BID ID -818213)