Supply, Erection, installation, testing and commissioning of equipments for improvement of earth resistance on 33/11 KV Sub-stations on turnkey basis against TN-550.

Amount

The rate of supply of item is inclusive of Freight and insurance at site including loading & unloading.

Supply of material:-

Supply of M.S. FLAT 50X6 MM

Supply of Maintenance free earthing rod consisting of copper bounded earth rod 24 mm dia, 3.0 Mtr long rod of 250 micron copper wounded along two bags of ground enhancement material (GEM to retain the moisture for long time to create low resistance zone Earthing as per IS: 3043-1987 and its latest amendments (Earth resistance for single earth should not be higher than 0.5 ohms). 20 Years warranty.

Supply of Maintenance free earthing rod consisting of copper bounded earth rod 24 mm dia, 18 feet long rod of 250 micron copper wounded along four bags of ground enhancement material (GEM to retain the moisture for long time to create low resistance zone Earthing as per IS: 3043-1987 and its latest amendments (Earth resistance for single earth should not be higher than 0.5 ohms). 20 Years Warranty.

Supply of M.S Rod of 20 mm dia and 3 Mtr. length

Description of Work / Item(s)

Amount

Mesh earthing for 33/11 kv sub-stations as per approved map & design using MS flat 50X6 mm/ MS road 20mm dia including laying of flat/rod at the depth of 0.65 Mtrs., welding & jointing at joints , structures & equipments etc. as under:-

Excavation of trench of 0.65Mtrs.depth and 0.5Mtr.width

1) Normal soil

2) Hard Soil

3) Ordinary rock ( where blasting is not required.)

4) Hard rock ( where blasting/ drilling is required.)

Laying of MS flat /MS rod in 0.65 Mtr.deep excavated trench and welding of MS flat/rod continuosly with 100 mm overlaping for straight joint including coating of MS flat joints with molten bitumen and covering joint with bitumen impregnated tape to protect from rust.

Shaping of MS flat for connecting the equipments with earthmesh .The work includes the welding of MS flat with equipments/structure and also with earth mesh.The work also includes coating of MS flat joint with molten bitumen and covering jointwith bitumen impregnated tape to protect from rust.

Filling of trench with available excavated muck in layers of 20 cm (Max.)consolidating each deposited layer by ramming & watering with lead up to 50 Mtr, and lift up to 1.5 Mtr.

Painting of exposed portion of MS flat/rod with two coats of red-oxide primer and two coats of green enamel paint.including material.

Erection of Maintenance free chemical earthing of 24 mm dia 250 micron copper bounded M.S. rod of 3 Mtr. length alongwith 2 bags of GEM as per procedure specified in the specification (Earth resistance for single earth should not be higher than 0.5 ohms). 20 Years warranty.

Erection of Maintenance free chemical earthing of 24 mm dia 250 micron copper bounded M.S. rod of 18 feet length alongwith 4 bags of GEM as per procedure specified in the specification (Earth resistance for single earth should not be higher than 0.5 ohms). 20 Years warranty.

Preparation of spikes made of M.S Rod of 20 mm dia and 3 Mtr. length as per design and requirment to be driven in earth by mechanical means and Providing & .fastening of suitable clampswith the M.S. Rod, connection of earth wire/stay wire/MS flat in clamp depending on type of soil.

1) Where drilling is not required

2) Where drilling is required

Capital Electech Private Limited

Capital Electech Private Limited