Public Works Department Tender

Supply and laying of 33 KV electrical rubber mats of size 1 mtr. X 2 mtr. ( 10mm thickness) at 33 KV and 3.3 KV Panel room at Gogal Pumping Station and Verna Pumping Station.

Supply and replacement of 12 V, 150 AH tubular inverter batteries of make Exide /Amaron at Verna and Gogal pumping stations including disconnectng of old batteries complete as directed by Engineer in charge..

Supply, installation, testing and commissioning of 1.6 KVA, 24 V inverter of make Exide including 12 V, 150 AH tubular inverter batteries of make Exide at Gogal MBR.

Supply, installation, testing and commissioning of lead Acid batteries of 2 V each for 30 V Battery Chargers at Verna and Gogal Pumping Station. including disconnectng of old batteries complete as directed by Engineer in charge.

Earthing with GI earth plate 600 mm x 600 mm x 6 mm thick including accessories and providing masonry enclosure with CI/RCC cover having locking/Lifting arrangement and watering pipe etc. (but without charcoal or coke and salt) as required as per the Earthing Drawing provided by the Engineer-Incharge.The scope of work includes the following: a) Excavation of pit of size 1.0x1.0x 3.0 mtrs(min) and disposal of excavated soil. c)Watering GI pipe, 20mm, Class B, with funnel as per specs. d) Charcoal/salt as per specs ( paid seperately). e) Refilling the pit of size 1.0x1.0x 3.0 mtrs(min) with soft black agriculture soil of minimum resistivity i/c transportation. e)Masonary chamber with proper foundation, cover plate and locking arrangement. f) Testing of earth value with earth megger and certifications of its value. Aluminium tag with embossed earthing value to be attached to the pipe.g)watering arrangement(plumbing will be paid seperately).

(a) In soily strata

(b) In rocky strata

Earthing with copper earth plate 600 mm x 600 mm x 3 mm thick including accessories and providing masonry enclosure with CI/RCC cover having locking/lifting arrangement and watering pipe etc. (but without charcoal or coke and salt) as required as per the Earthing Drawing provided by the Engineer-Incharge.The scope of work includes the following: a) Excavation of pit of size 1.0x1.0x 3.0 mtrs(min) and disposal of excavated soil. c)Watering GI pipe, 20 mm Class B, with funnel as per specs. d) Charcoal/salt as per specs ( paid seperately). e) Refilling the pit of size 1.0x1.0x 3.0 mtrs(min) with soft black agriculture soil of minimum resistivity i/c transportation. e)Masonary chamber with proper foundation, cover plate and locking arrangement. f) Testing of earth value with earth megger and certifications of its value. g)watering arrangement (plumbing will be paid seperately).

(b) In rocky strata

Extra for using salt and charcoal for GI or copper plate earth electrode as required( 96 Kgs of Charcoal and 5 Kgs of Salt)

Supply,unloading and spreading of granite or basaltic metal 50 mm nominal size in the substation switchyard as directed by Engineer-in-charge