ESWCA-28/2023-24

Amount

Safe Carriage of following store items with loading & unloading at both ends respectively. (under jurisdiction of DVVNL) to proposed site

Transformer

33 KV Single Transformer Control Panel.

33 KV VCB 800A, 750 MVA

33 KV CT, 200/100/1-1-1A

33 KV Post Insulator.

33 KV Lightening Arrestors

Cables

11 K.V. XLPE AL 3x300 Sq. mm.

Supply Providing of follwoing materials (Decentralized materials) by contractor with all associatas accessories like all Type Clamps, Nut & Bolts etc.

Plinth & foundation of VCB

Laying of 11 KV Cable Including cost of sand & bricks

(i) 3x300 Sq. mm Indoor

(ii) 3x300 Sq. mm Outdoor

Making of 11KV cable boxes mounted with switchgears and transformers.

24 Volt battery and battery charger with cabinet.

Control Cable

(i) 4x2.5 Sq. mm.Cu. xlpe

(ii) 2x2.5 Sq. mm.Cu. Xlpe

Power T/F earthing (water level)

(i) Neutral

(ii) Body

Painting of Substation Structure

Erection of following Material & Miscellaneous Electrical Works. (As Per RESPO Norms) :-

Plinth for 33 KV V.C.B.

Construction of plinth for the structure of 33 KV VCB & C.T.’s as per details for . (All required materials provided / Supply by the contractor own his cost) :- Excavation of earth of size 2x(2.0x2.0x1.0)m pits for construction of plinth.

Brick Ballast ratio (1:4:8) (cement, sand & brick ballast) for foundation work 2x(2.0x2.0x0.5)m plinth.

R.C.C. work in ratio 1:2:4 (cement, coarse sand & stone grit) of 20m size for making plinth of size 2x(2.0x2.0x1.0)m and grouting of foundation bolts 04 Nos. for 33 KV VCB.

12mm thick plaster with cement mortar in ratio 1:4 (cement & fine sand) of plinth of 0.4m upper side

Earthing of Power T/F, details as given below:-

Water level earthing by Boring and lowering of G.I. pipe size 40 mm dia & thickness 3mm into the ground at 20 Mtr depth or upto the water level with the lower end of solid copper cone Approx 225 mm long and 750 gm in weight shall be provided and screwed in pipe as well as bringing out a continuous copper wire 6 SWG from the cone up to the ground surface where it will be bolted to the G.I. earth Strip for Transformer neutral connection, the G.I.Earth strip size 50x6mm will be welded to the G.I. pipe and neutral earthing support & other installed equipment in switchyard. All required material provided / supply by the contractor own his cost.

Removal of existing 05 MVA Transformer and other accessories equipments.

Disconnecting HT cable connection from 33KV side & 11KV side of 5 MVA Power transformers for removing power transformer from plinth after proper shutdown. Dismantling of 11KV cable support structure, copper bus bar structure, M.S.Frame etc.

Disconnecting copper flexible/Earthing strip from Power transformer neutral & Dismantling neutral earthing system to facilitate removal of Power transformer from plinth.

Disconnecting Earthing strip from body of 5 MVA Power transformer.

Safe Shifting of 5 MVA Power transformer from existing plinth to safe place in the 33/11 KV substation switchyard.

H.T. Power Cable Laying (11 KV 3X300sqmm):

Laying 11 KV, (3x300) mm2 XLPE, Cable from power transformer to 11 KV incoming switch gear in the cable trench 0.45 m wide, 0.90m depth. Providing 150 mm local sand for cushion beneath and 150 mm above the cable (quality of local sand required 0.375 cum/m in length). The cable shall be dully protected by brick. On both side of cable by laying brick vertically and bricks would also be laid bricks along the single cable (minimum 18 Nos. of bricks are to be laid top and outer side along the single cable. The work includes digging of trenches, laying of cable in under ground trenches, joining of terminal’s, back filling of earth and testing and commissioning of power cable etc. Spare cable shall be left over and laid in the trenches in shape of 6 m ring at both ends.

Preparation of 11 KV Power Cable Jointing Kits:

Making of 11 KV XLPE Heat shrinkable Indoor/outdoor jointing kits 3x300Sq.mm after duly plumbing and taping of cable, providing, fixing and crimping of proper size good quality lugs

Installation of 24V Battery and Battery Charger:

Assembling and installation of the cabinet of 24V battery and battery charger in switch gear control room including grouting of foundation bolts as per drawing of manufacture, including providing the foundation nuts and bolts of proper size. The electrical connection between battery and battery charge with flexible copper lead of size 7/20 SWG shall be done properly. The work includes installation, wiring upto control panel, testing and commissioning complete in all respect.

Laying of Control Cables (2x2.5)mm2/ (4x2.5)mm :

Laying of different size of (2x2.5)mm2/ (4x2.5)mm2 control cables i.e. from Buchholz realy to Marshalling box Marshalling box to indication protection board in switch gear room, 33 KV CT’s to CT’s Junction Box, 33 KV CT, 33 KV PT, V.C.B. Control Panel Junction Box to 33 KV VCB control panel and control panel to 33 KV VCB outdoor operating mechanism panel from T/F etc. in the cable trench including making proper connection at Buchholz Relay, Marshalling box and indication board as per required for installed equipment.

Painting of Structures :

Painting of the all structures with one coat of ready mixed primer and two coats of ISI Mark Aluminium paint after rubbing with sand paper to the surface of the structure including labour and T&P complete in all respect.

Installation of 33 KV Lightning Arrestors:

Assembling and installation/mounting of 3 Nos. lighting arrestors on the L.A.’s structure/terminal gentry, complete with earthing and line connections. The work includes fabrication for proper fixing, if required.

Installation of 33 KV Post Insulators:

Installation of 3 Nos. PI on structure. The work includes fabrication for proper fixing, if required.

Installation of 33 KV VCB :

Assembling and installation of 33 KV VCB on the VCB out door structure on the plinth. Adjustment of operating mechanism in proper alignment for smooth operation of the same. The work also includes fabrication of addition arrangement for proper fixing, if required.

Installation of 33 KV VCB Control Panel for single T/F Control Panel.

Carefully and safely shifting of 33 KV VCB control panel from outside of the switch gear room to inside of the switch gear room, grouting with anchor bolts in the floor, work also includes cutting & proper finishing of floor if necessary for completion of work. Placing and fixing of panel on foundation, bolts of proper size in proper position and alignment.

Installation of 33 KV C.T.’s:

Installation of 3 Nos. C.T.’s on the C.T’s structure. The work includes fabrication for proper fixing, if required to complete the work.

33 KV CT’s Junction Box:

Providing & fixing of junction box of size (400x400x150) mm made of G.I. sheet of 16 SWG in between 33 KV CT’s & control panel. The work also include making proper connection on the junction box and making all connection in between CT’s and control panel complete as per manufacture’s panel drawing including testing and commissioning of work etc. complete the work.

Making Proper Connection on 10 MVA Power T/F 33 KV/11 KV Sides. Including welding of earthings etc.

Bobby Electricals