Providing Electrical Installation, Service connection ,1x 20 kVA EA Set and Aviation obstruction lamp for Phase IX.2 BTS Sites in Alappuzha BA

Amount

S/F Factory made Meter board Panel with concealed metal hinged door made of Thermosetting plastic SMC sheet with provision of holes for cable entry at bottom, rubber gasket for door with sloped roof for rain water drain etc having space provision for fixing 3 phase Energy meter & accessories like cut out fuse units, nutral link, RCCB, 4 Pole Isolator, 4 pole changeover switch with enclosure, DIN channel for fixing the switch gears etc i/c giving inter connection with 6 sq.mm copper conductor cable & fixing panel on existing wall surface/ angle iron stand, giving cable connections, sign writing the meter board etc. as reqd. (Make: Sintex, Model: GSMB 9045/GSJB 9045, Internal approx. size: 900x 450x 250 or Similar superior make) (Note; The contractor shall complete all necessary documentation work, including the submission of the application, preparation of drawings, and liaisoning with KSEBL authorities for obtaining the service connection. The statutory fee for obtaining the service connection shall be paid by BSNL on submission of demand note .)

S/F 6mm thick phenolic/SMC plank/hylam sheet of approx. size (900x 450 mm) mm suitable for fixing Energy meter, Fuses, RCCB, FP isolator, changeover switch etc. as required.

Supplying and fixing 3 Nos. 63 Amps rating, rewirable porcelain type cut out fuses and 1 No. bakellite neutral link (63A) complete with connections, testing and commissioning etc. as required.

Supplying and fixing 63 Amps rating, four pole, (three phase and neutral), 415 volts, residual current circuit breaker (RCCB),having a sensitivity current 300 mA in the existing meter panel complete with connections, testing and commissioning etc. as required.

Supplying and fixing 63 A, 415 volts, 4 pole isolator in the existing meter panel complete with connections, testing and commissioning etc. as required.

Providing and fixing MS angle iron frame of size 38 mm x 38 mm x 5mm for fixing the MB including cutting, welding and painting with two coats of metal primer and two coats of metal enamel paint etc complete as required.

Providing and fixing MS flat of size 38 mm x 5mm as cross members for fixing the MB including cutting, welding and painting with two coats of metal primer and two coats of metal enamel paint etc complete as required.

Providing Cement concrete foundation of approx size 0.60 x 0.40 x 0.40 m for erecting the angle Iron structure, plastering, finishing, applying cement primer etc complete as required.

S/f 63A, 4 pole onload change over switch with enclosure in the existing meter board I/c giving connections, testing, commissioning etc. complete as required.

S/F 40 mm dia 'B' class GI pipe with accessories like bend, socket for service connection including nesessary supports, painting etc., as required. (BSNL approved make)

Earthing with G.I. earth plate 600 mm X 600 mm X 6 mm thick including accessories, and providing masonry enclosure with cover plate having locking arrangement and watering pipe of 2.7 metre long etc. with charcoal/ coke and salt as required.

Providing and fixing 25 mm X 5 mm G.I. strip in 40 mm dia G.I. pipe from earth electrode including connection with G.I. nut, bolt, spring, washer excavation and re-filling etc. as required.

Providing and fixing 25mm x 5mm GI strip on surface or in recess for connections etc. as required.

Supplying and fixing following ways surface/recess mounting vertical type ,415V ,TPN MCB distribution board of , sheet steel,dust protected ,duly powder paited ,inclusive of 100A tinned copper bus bar ,common neutral link,earth bar,din bar for mounting MCBs(But with out MCBs and incommer )as required

Note: DB shall be of IP 54 rating suitable for outdoor application

4 Way (4+12),Double door

S/F following rating MCBs /isolator in the existing MCB DB complete with connections testiong and commissioning etc. as reqd.

63 A 4 P Isolator

32 A TP MCB

SP MCB 'C' series 5 to 32 A ,240V

MCB Blanking plate

S/F PVC 4 Module Waterproof Gang Box with 1 No 5/6 amp socket outlet and 2 Nos 5/6 amps switch including interconnection etc complete as reqd.

Wiring for circuit/sub main wiring along with earth wire with the following sizes of FR PVC insulated copper conductor, single core cable in surface/recessed PVC conduit etc as required.

2 x 1.5 mm²+1x1.5 mm² earth wire

Supplying and fixing Bulk head fitting suitable for 230V, 9 W/10 w LED bulb with accessories including interconnections,i/c Supplying and fixing 9W/10 W LED lamp, testing and commissioning etc. required (Bajaj/ Dalal or sim. Sup. Make)

Providing necessary frame work for fixing the Vetical DB including providing necessary rain water protection with the following members including suitable welding, fixing, drilling, grinding, painting etc.

25 x 25 x 3 mm thick MS angle iron

1 mm thick FRP sheet

Supplying and laying 2x1.5 sqmm PVC insulated,PVC sheathed copper conductor armoured cable including providing end termination in the following manner as required (Reputed cable brand with ISI Certification)

On surface of wall/On GSM Tower in existing cable tray

loose inside the panel/in existing pipe

SITC of LED based Aviation obstruction lamp Red coloured light with inbuilt automatic daylight/night redundant sensor twilight switch designed inaccordance with ICAO specification for Type B Aviation light, IP 66 Protection suitable for operation on 90-260V 1Ph AC supply ./ 25-50 Volts DC supply as per requirement including fixing on the top of on existing 40m high narrow based GSM tower tower with the suitable arrangement , making holes, nut & bolts etc., as reqd.( the input voltage requirement AC/DC as per the site requirement)

Providing and fixing isolation transformer of capacity 50VA suitable for 230V, 50Hz AC Supply in a suitable PVC/FRP casing to protect the same from rain water on the existing tower etc as reqd.

Chemical earthing as per RDSO specifications RDSO/SPN/197 for Equipment earthing /lightning conductor with earth electrode made of high tensile low carbon steel circular rods, molecularly bonded with copper on outer surface to meet the requirements of Underwriters Laboratories (UL) 467-2007 or latest or IEC 62561 having high tensile strength of not less than 50kg /m2 , high corrosion resistant strength, by digging and filling Earth enhancement compound together with back fill soil as per specification i/c providing masonay enclosure with cover plate etc.( Any RDSO approved Make or makes approved by M/s BSNL CO)

Earthing rod : Length of earthing rod : 3 metre min. Copper coating : 250 microns min,Diameter : 17mm Marking: UL marking, Manufacturer’s name or trade name, length, diameter, catalogue number must be punched on every earth electrode. Earth Enhancement material : i)confirm to the requirements of IEC 62561-7. ii) shall mainly consist of Graphite and Portland cement. Bentonite content shall be negligible. iii) shall have resistivity of less than 0.2 ohms-meter. iv) shall be thermally stable between -10 degree to +60 degree ambient temperatures. Earth enhancement material (minimum approx. 30-35 kg) shall be filled into the augured/dug hole in slurry form and allowed to set. Earth Pit: i)As per typical installation drawing no. SDO/RDSO/E&B/001. ii)A hole of 100mm to 125mm dia shall be augured /dug to a depth of about 2.8 meters. iii) A 450X450X300 mm (inside dimension) concrete box with smooth cement plaster finish shall be provided on the top of the pit. A concrete lid, painted black, approx. 50 mm. thick with pulling hooks, shall be provided to cover the earth pit. On backside of the cover, date of the testing and average resistance value shall be written with yellow paint on black background.

S/F 40 mm dia 'B' class GI pipe for cable protection including digging the soil ,making good etc., as required.(BSNL approved make)

Supplying and laying of following size DWC HDPE pipe ISI markedalong with all accessories like socket,bend,couplers etc confirming to IS 14930 ,Part II complete with fitting and cutting ,joining etc direct in ground (75 cm below ground level) including excavation and refilling the trench but excluding sand cushioning and protective covering etc complete as reqd

63 mm dia(OD-63mm&ID 51mm nominal)

Supplying and laying of following size perforated hot dipped galavanised iron cable tray (Galvanisation thickness not less than 50 microns) with perforation not more than 17.5% in convenient sections ,joined with connections ,uspended from the ceiling with G.I.suspender including GI bolts and nuts etc as reqd

300mm widthX50mm depth X1.6 mm thicknes

Supplying, laying and fixing of one number PVC insulated and PVC sheathed/ XLPE Al power cable of 1.1KV grade of 4 C 25sq.mm in following ways including all as required.

In existingRCC/ HUME/ METAL/DWC pipe

On surface of wall /Existing Cable tray (Clamped with 1mm thick saddle)

In masnory opend duct / loose in panel

Supplying and making end termination with brass compression gland and aluminium lugs for following size of PVC insulated and PVC sheathed / XLPE aluminium conductor cable of 1.1 KV grade as required.

4X 25 sq. mm

P/F 6 SWG dia GI wire on surface/recess for loop earthing as reqd.

Supplying and fixing GI earth bus bar of size 300X50x10 mm size on suraface of wall with suitable insulators for mounting etc as reqd

Lifting up / Lifting down of the EA set Upto 30 KVA Capacity conventional type/Canopy / RTU type - between the floors (from/ to the room or rooftop where the EA plinth located) as below with suitable crane/ pulley/ manpower arrangement as the per the site requirement without any damage etc complete as required.

lifting up OR down between ground level up to 2nd floor

SITC of Surge protection devices in (3+1) configuration ,type I+II combined in existing DIN Channel, all interconnections, extending earth point of SPDs with 16 sqmm fire retartdent PVC insulated multi strand single core copper conductor cable, upto 10m max. to equipotential bonding bar, end terminations etc as per following standard specifications.

The SPD should have the following technical features

Nominal voltage : 240/415 V AC

Maximum discharge current Imax (8/20) µs (L-N)- 50 KA

Maximum discharge current Imax (8/20) µs (L-PE)-50 KA

Impulse discharge current (10/350) µs (N-PE), peak current value I imp=100 KA

Total discharge current Itotal (10/350) µs - 100 KA

Voltage protection level Up (L-N)/ (N-PE) : ≤ 1.5 Kv

TOV behavior at UT (L-N): 415 V AC (5 s / withstand mode), 440 V AC (120 min / withstand mode)

TOV behavior at UT (N-PE): 1200 V AC (200 ms / withstand mode)

Response time tA ≤ 100 ns

Note:- The SPDs shall conform to generic requirements for lightning and surge protection of telecom sites issued vide GR No. TEC/ GR/FLA/LSP/001/01/June2010 by TEC, New Delhi and in confirmity with BSNL CO guidelines.

Complete as above

Supplying and installation of Polycarbonate Distribution board of industrial quality (Approx size 200mm x 200mm x 120 mm) for accomodating Surge Protection Devices i/c providing masking and labelling strips, necessary Din channel etc as required

Supply ,installation of fabricated /ready made weather proof enclosure on existing MS frame for accomodating the existing 4 way vertical DB as required

Important Note: The site names mentioned are indicative and currently in the planning stage. BSNL reserves the right to change the site locations anywhere across Kerala as required. No additional payment will be made on this account. Any changes to the sites or their locations, if applicable, will be communicated at the time of contract award.

S and S Electricals (BID ID -838200)