Increasing capacity of Power Transformer from 5 MVA to 10 MVA at 33/11 KV Substation Jail Road, Naini, Prayagraj

Amount

Increasing capacity of Power Transformer from 5 MVA to 10 MVA at 33/11 KV Substation Jail Road, Naini, Prayagraj including safe carriage of all materials from store center Naini, and its unloading at dump site & vice versa under Supervision of EUCD-I Prayagraj.

Dismantling and carriage of existing 5 MVA, 33/11 KV Power Transformer from 33/11 KV Substation Jail road to Naini Store, Prayagraj.

Installation, Testing & Commissioning of the following line material at existing Switchyard inside 33/11KV Jail Road Naini, Prayagraj. (Clamps, lugs, Grouting materials, connectors and arrangements for testing etc will be arranged by the contractor. Only L.A. alongwith Structure, CT, PT alongwith Structure, V.C.B. O/G, ACSR Dog conductor and 11 KV XLPE Cable will be provided by the department.

33 KV Lightning Arrester alongwith structure

33 KV PT alongwith structure

11 KV VCB O/G

Installation & commissioning and Testing of the new 33/11 KV 10 MVA T/F (with oil) on the transformer plinth at 33/11 KV Jail Road Substation with all HT Connections complete properly in all respect (10 MVA T/F alongwith accessories will be provided by the department). This work includes dragging loading, shifting, lifting and complete assembling after placing on the plinth. All special and ordinary T&P for above purpose is to be arranged by the contractor. Special care is to be taken to avoid tilting of T/F and loss of transformer oil. Any damage in T/F will be chargeable to contractor.

Special earthing of 10 MVA power T/F neutral by boring 03 Nos. 60 feet long G.I. pipe each to make delta point and connecting it with 50x8 mm. G.I. strip to T/F neutral giving half round turn at the T/F. Two separate earthing to be provided to T/F body by connecting it with 50x8 mm G.I. strip with earth mat by special earthing arrangement for earthing work. All the required materials for earthing shall be provided by the contractor. 01 No. job includes 01 no. delta earthing connecting to T/F neutral by G.I. Strip and 02 no. separate body earthing connected to the earth mat by G.I. Strip.

Special earthing of lightening arrestor structure with 3 Nos. additional 2.5 Mtr. Long G.I. pipe electrodes/rod by digging 3 Mtr. deep pits and connecting it with L.A. through G.I. Strip 50x8 mm welded at both ends. All the required materials Like G.I. pipe, G.I. strip, clamp, nut and bolt etc shall be provided by the Contractor.

Earthing of CT and PT Structures as per RESSPO norms erected in the yard with 50x6mm. G.I. strip fully welded at both ends to be connected to the earth mat. All the materials shall be provided by the contractor.

Earthing of 11 kv VCB O/G by using 50x6 mm G.I. Strip as per RESSPO norms. All the required materials shall be arranged by contractor.

Construction of cable trench and making of proper connection through copper control cables with the help of PVC pipes from VCB, C.T., 10 MVA T/F to T/F Control Panel in the switchyard and of 11 KV switchgear as per direction of engineer. Trench to be 12” wide and 9” deep. work includes digging, of trench, concreting of the foundation in the ratio 1:3:6 R.B. wall 9” wide with cement mortar 1:4 and plastering inside the trench in the ratio 1:3 and sand filling in the trench. All the materials including copper control Cables of 4 core and 2 core and PVC pipes will be provided by the contractor.

Fixing of termination of cable boxes of size 3 x 300 sqmm by HS Cable Jointing Kit. XLPE cable Boxes will be of Heat Shrink indoor type and outdoor type and will be provided by the contractor.

Dismantling of Existing plinth and Construction of complete new T/F plinth size 3mx3m x 0.3 Mtr. above the ground level and 0.75 Mtr. deep foundation made as per drawing. Top of plinth is to be C.C. work in the ratio of 1:3:6 fitted with 4 Mtr. long each, 90 lbs, 2Nos. rail pieces. Cement mortar is to be used in 1:3 ratio. Cement, concrete material, bricks used in plinth shall be supplied by the contractor. 6” stone grit is to be laid before foundation start for whole plinth. All materials including 02 Nos. 90 lbs 04 meter each rail pieces shall be provided by the contractor.

Laying of 11 KV 3x300 Sqmm XLPE power cable of 250 Mtr. by digging 0.75 Mtr. deep trench, putting layer of sand in the bottom, ramming it and The cable shall be laid between two Continuous rows of bricks, river sand packing on all side of cable shall be done. After Laying of Cable stone slab shall be laid in such a manner so that cable channel is completely covered to the top. Finally covering the same by earth and leveling of the same, all the materials, except 11 KV XLPE cable, will be provided by the contractor.

Installation of 24 Volt Battery (2 Volt x 12 no) and 24 Volt Battery Charger with Cabinet in the switch gear room, by grouting base channel 100 x 50 x 6 x 1000mm. Fixing of rag bolt. Battery set 24 V (2 Volt x 12 no) and Battery charger 24 V shall be arranged by Contractor.

Repairing & Overhauling of existing protection system (including 33 KV control Panel)

GANGA ELECTRICALS

M/S INDIA ELECTRICALS