WORK FOR BORE EARTHING OF 63 MVA 132 33 KV T/F-I II AT 132 KV S/S SAIDNAGLI UNDER ETD- AMROHA.

Amount

WORK FOR BORE EARTHING OF 63 MVA 132/33 KV T/F-I&II AT 132 KV S/S SAIDNAGLI UNDER ETD- AMROHA. Note- 1. G.I. pipe, G.I. flat, copper plate, coal, salt, nuts & bolts shall be arranged by the contractor. 2. M.S. round & M.S. flat only shall be supplied by the department free of cost.

Following is required to carried out 132/33 KV 02 Nos. 63 MVA (1 No earthing each). T/F LV neutral earthing with the help of bore earthing method as following specification.

Boring with 150 mm. dia casing pipe to depth of 21.0 meter long ground level with skilled and unskilled labour including all T & P boring apparatus and supervision charges etc. required for proper completion of work.

Inserting 40x6 mm G.I. flat with 150 mm dia. B-class(Jindal) ISI mark 6.0 meter long pipe placed horizontally on ground and bolting the G.I. flat with 150 mm long 75X10 mm. copper flat conical piece on and then bolting the G.I flat pipe in such a way that copper flat remains in contact with the pipe. Lowering of 6 meter long G.I. pipe with conical copper flat conneted and at the bottom along with G.I flat inside the pipe in boring of 150mm G.I. pipe pieces by G.I. sockets along with 40x6 mm G.I. flat running inside the pipe by making 150 cm. lap joints 75 mm above ground level. Taking out 40x6 mm G.I. flat from the upper end of pipe by making a cut of 45 mm. wide up to a depth of 50 mm in upper portion of G.I. pipe and providing 1 No. cap type G.I. socket on upper threaded portion of pipe for water pouring in the pipe at regular intervals filling the space between and G.I. pipe by river sand.

Fabrication of M.S. electrodes out of 32 mm, dia M.S. round 3.0 meter long having 150 mm. long conical shape.

Excavation of pit of size 3.50 Mx. 3.50 Mxl. 50 driven of M.S. electrodes of 32 mm. dia 3.0 mtr. Long in the earth on four corner of the pit equal distance of 3.0 mtr. Long deeping the top of electrode 50 cm above the pit ground level, welding of 32 mm M.S. round pieces of 3.05 mtr. below of top of electrode by 08 nos. U-type clamp of 50x6 mm G.I. flat on opposite side of a square welding of 40x6 mm G.I. flat on opposite M.S. electrode driven in ground and connecting the 40x6 mm G.I. flat taking out from 32 mm dia G.I. pipe in excavated trench of 50x50 cm.

TIRUPATI ELECTRICALS

S KUMAR TRADERS

NAVEEN AND COMPANY

KARAN SINGH