RMBRO/E/NAL/RM2/IPDS/19-20/17

Amount

Erection of 4-pole H.L. structure on 8 mtr. long P.C.C. pole (erection of pole shall not less than 1500mm and equal height over GL with existing HL structure) with all fittings ( P.C.C. pole & raw irons will be supplied by WBSEDCL but all nut and bolt to be supplied by agency must be galvanized; steel structure must be galvanized as directed in point no 26) and complete foundation by CC 1:2:4 but without any insulator, as per standard drawings ,including painting (two coat primer and two coat acryalic painting after which 'IPDS' to be mentioned in yellow ink) as instruction of site engineer of WBSEDCL

33 KV H.L. Gantry-cum Isolator with LA support structure (Ref. Drg. No.- RE/SS/39)

33 KV H.L. Isolator support structure. (Ref. Drg. No.- RE/SS/34)

Erection of 4-pole L.L. structure on 8 mtr. long P.C.C. pole (erection of pole shall not less than 2500mm and equal height over GL with existing LL Structure) with all fittings ( P.C.C. pole & raw irons will be supplied by WBSEDCL but all nut and bolt to be supplied by agecy must be galvanized; steel structure must be galvanized as directed in point no 26) and complete foundation by CC 1:2:4 but without any insulator, as per standard drawings ,including painting (two coat primer and two coat acryalic painting after which 'IPDS' to be mentioned in yellow ink) as instruction of site engineer of WBSEDCL

33 KV L.L. Isolator support structure(Ref. Drg. No.- RE/SS/41)

33 KV L.L. End Isolator support structure( Ref. Drg. No.- RE/SS/38)

Fabrication and erection of LT cable end box supporting frame work on civil foundation (to be constructed under separate order) by GI Chanel, Angle and Flat ( MS irons will be supplied by WBSEDCL ; nut and bolt to be supplied by agency must be galvanized; steel structure must be galvanized as directed in point no 26) complete with all fabrication for terminal arrangement for Station Service Transformer (Ref. Drg. No.- RE/SS/11)

Erection of single H-beam pole of 13 mtr. long with complete foundation and fittings ( poles & MS irons to be supplied by WBSEDCL; nut and bolt to be supplied by agency must be galvanized; steel structure must be galvanized as directed in point no 26) as per approved drawings, including painting (two coat steel primer and two coat best quality synthetic enamel painting after which 'IPDS' to be mentioned in yellow ink including smoothening surface by sand papering) as instruction of site engineer of WBSEDCL

fixing 33 KV polymer Disc insulator 70 KN along with supply and fixing of suitable hardware fittings (Compression type for Bus conductor) including supply of i-bolt as directed by site engineer of WBSEDCL

fixing 33 KV Polymer 10 KN Pin Insulators

Erection of 36kV, 630A, 28.8kA for 3 seconds, 3-ph double break center rotating type (DBCR), Gang Operated, isolator along with fixing of support post insulators, Operating Mechanism, Base Channel, Down Pipe and all required accessories complete, as per standard drawings and instruction of site engineer of WBSEDCL

With ES (HL)

Without ES(LL)

Without Any Attachment(HL)

Supply and Erection of CT structure on civil foundation(to be constructed under separate order) and fixing of CT on it including supply and fixing of CT burden box(specification of Burden Box is attached in NIT) for each set, of any reputed make as per drawing No-PLN(D)SS/57 and as per instruction of Site engineer of WBSEDCL

Supply, Erection and connection of PT(including supply ofPAD connector and PT connector) on HL Structure by making cantileveer arangemnt by GI steel (fabrication to by agency & raw irons will be supplied by WBSEDCL but all nut and bolt to be supplied by agency must be galvanized; steel structure must be galvanized as directed in point no 26) including supply and fixing of PT burden box(specification of Burden Box is attached in NIT) and connector for each set as per instruction of Site engineer of WBSEDCL

Erection of support structure on civil foundation(to be constructed under separate order) of 36 KV, 1250 A, 31.5 KA for 3 sec, 3 phase Outdoor type SCADA compatible Vacuum Circuit Breaker of any reputed make and installation of Vacuum Circuit Breaker on that structure as per standard drawings and instruction of site engineer of WBSEDCL

Erection of 100 KVA 33/0.4 KV,3 ph, 50 Hz, ONAN, Cu.Wound CRGO core outdoor type Distribution Transformer(station service Transformer) by ismentalling from its previous location) on civil foundation(to be constructed under separate order) including supply of proper bi-metallic lugs(for HT &LT side bushing)as per approved drawings and instruction of site engineer of WBSEDCL

Drawl of Bus Conductor(8set of HL & 8 Set LL) and fixing of droppers/connctors/lugs including jumpers, T-connectors, PAD connctors(all T connctor, PAD connctors to be supplied by agency; Erection ) etc as per standard drawings and instruction of site engineer of WBSEDCL

Drawl of Conductor(for 33KV Feeder bay) and fixing of connctors/lugs including jumpers to various equipment using 11 KV and 33 KV insulators, GI Pin, GI Hardware fittings, PG Clamps, T-connectors, PAD connctors(all PGclamps, PAD connctors, CT/PT connctors to be supplied by agency) etc as per standard drawings and instruction of site engineer of WBSEDCL (Each set represents each 33KV Feeder BAY complete)

Erection of 42kV, 1-ph Station Class Lightening Arresters in Gantry cum LA support four pole structure and connection with Dog conductor by suitable connectors and lugs(all connectors/lugs to be supplied by Agency) neatly, as per approved drawings and instruction of site engineer of WBSEDCL (1set-3nos)

Installation of sheilding arrangement by drawl 50 sqmm. ACSR conductor, fixing of inverted earthspike on 13 m long shielding pole(to be erected under Sl no 4)

Laying, fixing & jointing of control Cables in trench/pipes/underground/overhead with their terminations at Indoor/Outdoor terminals including supply of Glands, lugs, cable ties, proper name plate tagging etc. as required to be done as per Technical Specification and as per instruction of site-in-charge of WBSEDCL

4 Core 2.5 sqmm armoured, stranded copper conductor, PVC insulated and PVC sheathed cable

8 Core 2.5 sqmm armoured, stranded copper conductor, PVC insulated and PVC sheathed cable

12 Core 2.5 sqmm armoured, stranded copper conductor, PVC insulated and PVC sheathed cable

Erection of HT Stay set complete for drawl Shielding conductor

Laying and Dresing of 3C x400 Sq mm 33KV UG cable inside RCC cable trenches/ Excavated soil trenches as dir

Excavation of soil for formation 500x1500x 2000(between Line DP to boundary wall) of cable trenches & re-insttement of cable trencs with th excavated soil as per direction of site engineer of WBSEDCL

Supply and fixing of GI Pipe (Medium) as per ISI of 150 mm dia. For cable protection riser of 3C x400 Sq mm 33KV UG cable as directed by site engineer of WBSEDCL

Fixing of GI channel/Angle for holding of above mentioned protection riser Pipe as directed by site engineer of WBSEDCL

Supply and fixing of cable tag on the 3C x 400 sq mm UG Cable as directed by site engineer of WBSEDCL

Making ang fixing of outdoor type Heat shrinkable cable termination kit of 3C x400 Sq mm 33KV UG cable as directed by site engineer of WBSEDCL (Kit will be supplied by WBSEDCL)

Making ang fixing of Stright through Heat shrinkable cable jointing kit of 3C x400 Sq mm 33KV UG cable as directed by site engineer of WBSEDCL (Kit will be supplied by WBSEDCL)

Earth Mat Works

Laying of Earth Grid with 65X6 mm MS Flat(to be supplied by WBSEDCL) including Jointing (100 mm Minimum for lapping) of all contacts by welding and all welded surfaces should covered with Bitumen compound along with excavation (trench of 500 mm width & 650 mm depth) and back filling of excavated earth without any stone particles in the excavated trench to ram properly up to the finish ground level

Supply and Drawl of Earth risers with 65X6 mm GI Flat(must be Hot dipped galvanized as directed in point no 26 as per IS 4759 and IS 2629 and will be tested as per IS 2633) from the Earth Mat/ Pipe to each of the outdoor equipment, earth riser, Yard Structures and Power equipment like PTRs, Station Service transformer, VCB, C T and interconnection between earthmat(if any), including excavation of soil & back filling of the same as required. Jointing (100 mm Minimum lapping) of all contacts by welding(L-joint, T joint and X-joint) and all welded surfaces will coated with bitumen compound

installation of Pipe earthing for Earth mat, PTR neutral, Battery Room, Delta earthing for control room equipment(two Pipe of delta will be connection with CRB Earthing) with 50 mm dia,3m long of medium duty(ISI marked Jindal/ Tata make) perforated Gl Pipe( with suitable no of holes- 16mm dia and 150 mm distance between each holes) of proper size of Gl socket to hold the wire mesh funnel over the top of the Gl pipe(for proper provision of watering), providing alternate layer of soil & bentonite powder (60:40) as per specification of IS-3043 for proper earthing including construction of brick chamber, inside and outside plastering of the chamber and neat punning ,10 mm thick hinged CI cover frame(400x400mm) over the top of the chamber as per l.E. rule and supply as well as delivery of all the required materials. All earthing pipe should be tightly and neatly connected with earth mat of GI Flat.

Laying of 2 run Earth Strip of GI Flat, 50x6 mm inside control room Cable trench(1 run at each wall) of the Control Room fitted over the epoxy earth bus holder fixed over the Trench wall at a regular interval to hold the GI strip tightly and neatly and making connection(from each run strip) with 11 KV VCB Panel, 33 KV CR Panel, including supply of GI Flat(Hot dipped galvanized as per IS 4759 and IS 2629 and will be tested as per IS 2633), Bus holder, Saddle, Screws etc. and Jointing (100 mm Minimum lapping) of all contacts by welding(L-joint, T joint and X-joint) and all welded surfaces will coated with bitumen compound. Both of the said GI earth strip to be connected with nearest CRB earth strip

GALVANIZATION of structural steel material for above work (supplied by WBSEDCL).All structural steel members shall be galvanized after fabrication as per IS:4759 ( zinc coating shall not be less than 610gm/sq. meter)

Ghosh Construction Co.

BIRBHUM ELECTRICAL CONSTRUCTION

QUAZI GOLAM MOJTOBA