REPAIR/MAINT OF 33KV MAIN RECEIVING STATION AND CONNECTED WORKS OF EXTERNAL ELECTRIFICATION SYSTEM AT AF STN BAMRAULI

Amount

Surface excavation not exceeding 30 cm deep and averaging 15 cm deep and getting out in soft/loose soil complete all as specified and directed.

Excavating in trenches not exceeding 1.5 metre wide and not exceeding 1.5 metre deep and getting out in soft/loose soil complete all as specified and directed.

Returning filling in foundation / trenches including spreading leveling, watering and well ramming in layers not exceeding 25cm thick in soil complete all as specified and directed by Engineer-in-Charge.

Sand cushioning for under ground cable with locally available sand for protection of cable 8cm before laying cable and 15cm deep over the cable as loose filling layer including spreading and consolidations complete all as specified and directed by Engineer-in-Charge. Note :- Punned thickness 18cm will be measured and paid.

Removing surplus soil to a distance not exceeding 50 metre and depositing where directed at a level not exceeding 1.5 metre above the starting point.

Supply and laying hard core of stone aggregate of grading II, 40mm to 63 mm size at out door substation complete all as specified and directed. Note :- 10% voids shall be deducted from thickness of hard core.

Supply and laying in trenches dry well burnt locally available sub class 'B' bricks over sand cushioning for protection of cable complete all as specified and directed.

Supply and fixing 150 mm dia Tubes, ‘light grade’ galvanised, with all fitting laid in trenches, under floors, roads along poles for protection of cables including sealing ends (including necessary clamps etc in case of poles) and old U/s taking down GI Pipe complete all as specified and directed. Note :- Excavation and earth work shall be measured and paid for separetely under respective item of this schedule.

Supply, laying and testing in trenches/through pipes/ducts or on poles at crossing of OH lines of MES and road crossing Cross linked polyethylene insulated (XLPE) armoured cable with aluminium conductor, 11 KV `E’, 3 core IS-7098 of cross sectional area 185 Sqmm including taking out old cables. Note :- (i) Old cable and joint kit retrieved under this item shall be contractor property and necessary amount as per schedule of credit shall be deducted from contractor due payment. (ii) Excavation, earth work, cable joint, sand cushioning, protection cover and pipe shall be measured and paid for separately under respective items of this schedule.

Supply and laying rubber mat size 1metre X 2metre X 6.0 mm thick complete all as directed at site by the Engineer-in-Charge.

Material and labour maintenance of power transformer up to 100 KVA capacity including following :- (a) Oil leakage checked and necessary rectification, (b) All loose connection (power & control) are checked and rectification, (c) Silica gel checked and replaced as required, (d) IR value of HV to body, LV to body & HV to LV to be checked by megar. (e) Transformer oil level top up as required. (f) Transformer oil filtration. Filter machine supplied by the contractor. Note :- All the work shall be done as per instruction by the Engr-in-charge (i) Upto 100 KVA Power Transformer (ii) Upto 3150 KVA Power Transformer

Material and labour maintenance of power transformer up to 3150 KVA capacity including following :- (a) Oil leakage checked and necessary rectification, (b) All loose connection (power & control) are checked and rectification, (c) Silica gel checked and replaced as required, (d) IR value of HV to body, LV to body & HV to LV to be checked by megar. (e) Transformer oil level top up as required. (f) Transformer oil filtration. Filter machine supplied by the contractor. Note :- All the work shall be done as per instruction by the Engr-in-charge (i) Upto 100 KVA Power Transformer (ii) Upto 3150 KVA Power Transformer

Supply & fix heat shrinkable, straight through joint kit for XLPE HT U/G cable , 11 KV grade suitable XLPE cables cross sectional area 120 -185 Sqmm, 3 core XLPE out door type including jointing material and cutting of old cable complete all as specified and directed by Engr-In-Charge.

Supply & fix heat shrinkable, indoor type joint kit for XLPE HT U/G cable , 11 KV grade suitable XLPE cables cross sectional area 120 - 185 Sqmm, 3 core XLPE out door type including jointing material and cutting of old cable complete all as specified and directed by Engr-In-Charge.

Supply & fix heat shrinkable, outdoor type joint kit for XLPE HT U/G cable , 11 KV grade suitable XLPE cables cross sectional area 120 - 185 Sqmm, 3 core XLPE out door type including jointing material and cutting of old cable complete all as specified and directed by Engr-In-Charge.

Supply & fix in replacement heat shrinkable, cable outdoor termination joint kit for XLPE HT U/G cable , 11 KV (E) grade suitable XLPE cables cross sectional area 50 - 95 Sqmm, 3 core XLPE cable including jointing material and cutting of old cable complete all as specified and directed by Engr-In-Charge.

Supply & fix in replacement heat shrinkable indoor termination cable joint kit for XLPE HT U/G cable , 11 KV (E) grade suitable XLPE cables cross sectional area 50 - 95 Sqmm, 3 core XLPE cable including jointing material and cutting of old cable complete all as specified and directed by Engr-In-Charge.

Supply & fix heat shrinkable outdoor type cable joint kit for XLPE HT U/G cable , 33 KV grade suitable XLPE cables cross sectional area 300 Sqmm, 3 core out door type including jointing material and cutting of old cable complete all as specified and directed by Engr-In-Charge.

Supply & fix heat shrinkable indoor type cable joint kit for XLPE HT U/G cable , 33 KV grade suitable XLPE cable cross sectional area 300 Sqmm, 3 core in door type including jointing material and cutting of old cable complete all as specified and directed by Engr-In-Charge.

Supply & fix heat shrinkable outdoor type cable joint kit for XLPE HT U/G cable , 33 KV grade suitable XLPE cables cross sectional area 300 Sqmm, 3 core straight through including jointing material and cutting of old cable complete all as specified and directed by Engr-In-Charge.

Repairing and servicing (Oiling and greasing) of gang operated switch 400 Amps, 33 KV vertical/Horizontal mounted and replacing defective parts. Including replacement of U/S spare parts as required for smooth functioning of AB switch, testing for its proper operation, all as directed at site by the Engineer-in-Charge. Note :- (i) Spares shall be measured and paid separately under respective of item as supply only. (ii) Old materials retrieved under this item shall be contractor property and necessary amount as per schedule of credit shall be deducted from contractor due payment.

Supply only Male Contact/moving contact Blade heavy duty high conductive metal cap 200 / 400 Amps, 33 KV. complete all as specified and directed by Engr-In-Charge.

Supply only Female Contact/Fix contact Jaw heavy duty high conductive metal 200 / 400 Amps, 33 KV complete all as specified and directed by Engr-In-Charge.

Supply and fixing in replacement four in series disc type assembly insulator porcelain for working Voltage 33 KV white, brown or green insulator of suitable size ball and socket type with tension clamp working all as directed at site by the Engineer-in-Charge.

Supply, top up / filling of transformer oil EHV as per IS 335 of 1993 Part II. Note :- (i) Oil shall be brought in the manufacture sealed contrainer (drum) and shall be kept in safe custody of Engineer-in-Charge. (ii) Contractor shall hand over the purchase voucher and manufacturer's test certificate to the engineer in charge. (iii) Di-electric strength shall not be less than 50 KV.

Material and labour for defect rectification in HT 33 / 11 KV cable laid in trenches by locating fault with the help of electronic fault locator machine comprising of surge generator pules ECHP fault location with high frequency distance calculator etc. including excavation in any type of soil strata, exposing the cable fault, removal of deteriorated position of cable, treating of cable and keeping the same ready for jointing work for cables of sizes upto 300 Sqmm 3 core complete all as specified and as directed by Engineer-in-Charge. Note :- The fault locator equipment will be brought at site within two hours of instruction received from Engineer-in-Charge

Supply and fixing in replacement pin type insulator porcelain with GI Spindle nut for 33000 Volts grade complete all as specified and as directed by Engineer-in-Charge.

Supply and fixing in replacement 33 KV outdoor type single phase, cast epoxy type PT of ratio 33KV/110 V, class 0.5, burden 100 VA, insulation level 70/170 KV confirming to IS 3156 all as directed.

Supply, installation, testing and commissioning Current transformer outdoor type (CTs) single pole 3 core cast epoxy type of 15 VA burden, class 1, 5P10 and PS having turn ratio 60-30/5+5+1 Amp and suitable for protection and metering of 33 KV system mounted on and including suitable MS channel/angle iron pedestal etc. to MCCB and 1 No Junction box for CTs connection having 3 X 12 way stud type terminal block and cable gland plate with suitable size of gland for cable entry of 10 x 2.5 Sqmm - 04 Nos and 4 x 2.5 Sqmm - 02 Nos cable connection and old U/s CT taking down complete all as specified and directed by Engr-In-Charge.

Painting of 33 KV HT steel four pole structure with cross arms, clamp of any length and shape with two coat of aluminium paint including preparation of the existing surface including marking pole numbers like (HT-101) in a 150mm dia yellow circle & provide three blue & two white bends of width 30 cm by fluorescent paint, from top of PCC pedastal of pole complete all as specified and directed by Engineer-in-Charge. Note :- Painting work shall be carrid out after written shut down from both ends ie. 33 KV MRS Airforce and 220 KV cantt civil power house.

Painting of transformer complete with radiator of capacity for 3150 KVA, 33/11 KV outdoor type after cleaning the body surface by rubbing with emery paper to remove oil strains, dust etc and appling two coat of heat resistance paint by spray paint including writing of SM/ MES No, capacity of transformer and date of installation complete all as specified and directed by Engineer-in-Charge.

Painting of transformer complete with radiator of capacity for 100 KVA, 33/.433 KV outdoor type after cleaning the body surface by rubbing with emery paper to remove oil strains, dust etc and appling two coat of heat resistance paint by spray paint including writing of SM/ MES No, capacity of transformer and date of installation complete all as specified and directed by Engineer-in-Charge.

Inspecting, checking (all connections and mechanism), cleaning, servicing, overhauling, testing, calibrating the relays (IDMT, over current and earth fault) complete of 33 KV vacuum circuit breakers outdoor type 400 Amps, capacity having rupturing capacity 750 MVA floor mounted including following works : - (a) Taking out incoming and outgoing HT 33 KV 3 core cables from the electric system and reconnecting the incoming and outgoing HT cables complete of both panels. (b) All the connections of control wiring availability of proper DC supply and AC supply, incoming and outgoing connections and tightening them, cleaning the contacts and terminal with CRC solution and using the blower for dusting operation, raising and lowering mechanism. Note : (i) Servicing checking and calibration of VCB shall be carried out by the OEM or his authorized representative/dealer only. (ii) All the test record for proper tripping of CTs raising and lowering operation mechanism and proper tripping system of over current and earth fault relay shall be recorded duly signed by the contractor, Engineer-in-Charge and representative of OEM shall be produced before allowing payment to the contractor.

Supply and fixing in replacement lighting arrestor non linear resistance type line discharge current 10 KA height current 100 KA assembly suitable for 33 KV including all necessary clamps, nut, bolts and washers and connecting to earth with 32 x 6 mm GI Strip complete.

Material and labour charger with battery bank 110 V DC maintenance throughout checked/cleaned, all loose connection are to be checked and tightened, indication lamps are to be checked/replaced indication lamp cost will be included in above rate and other damaged parts to be replaced as per instruction of Engr-in-Charge.

Testing and calibration of IDMTL Type E/F & O/C relays of any make at 33 KV sub-stations as per instruction of the Engr-in-charge.

Supply and fix in replacement of Silica gel breather assembly with silica gel cristal suitable for 3150 KVA transformer to air column of conservator tank complete all as specified and directed by Engineer-in-Charge.

Supply and fix in replacement of Silica gel breather assembly with silica gel cristal suitable for 100 KVA transformer to air column of conservator tank complete all as specified and directed by Engineer-in-Charge.

Supply & fix in replacement HRC fuse 2/6 Amp, 415 Volt AC for VCB 11 KV complete all as specified and directed by Engineer-in-Charge.

Supply and fixing fire extinguisher of capacity 4 KG complete all as specified and directed. Note : (i) Make of fire extinguisher shall be CEASE FIRE ABC POWDER MAP 90 (4KG) or technically equivalent of other make (ii) Fire Extinguisher is effective against class A, B, C fires as well as Electrical fires.

Material and labour for earthing complete with copper earth plate electrode 600mm x 600mm x 3.15mm thick buried directly in ground vertically to depth not less than 3.0 metre below normal ground level (with top edge of earth plate not less than 2.70 metre below ground level), connected to copper strip 20mm x 3mm main earthing lead by means of galvanized bolts, nuts and washers with connected to earth test point to main switch board panel etc. all as specified and testing on completion with and including necessary excavation and earth work, in any type of soil, adequate quantity of charcoal dust and common salt, test point, earth pit covered with precast (RCC 1:2:4) type B1 (using 20mm graded stone aggregate) 40 mm thick cover, reinforced with 8mm dia TMT bar 3 Nos. dia both way with 12mm round bar handle. GI medium grade watering pipe 20mm dia with funnel, wire mesh all as shown in electric plate No. 3 of MES SSR Part-I and 40mm dia GI medium grade pipe for earth lead protection complete and old U/s taking down earthing all as specified and directed.

Note : ( i ) The rate is inclusive of cost of earth lead and protection pipe upto 7.5 m. (ii) Irrespective of what is shown on plate No 3 of SSR Part-I /2009, the earthing pit shall be precasted PCC (1:3:6) type C1 using 20 mm crushed stone aggregate and the cover of earthing pit shall be of precast RCC (1 :2 : 4) type B-1 using 20 mm stone aggregate, reinforced with 6 mm dia round bars @ 75 mm C/C both ways with MS handle 12 mm dia with suitable handle finished with surface all as specified. (iii) The rates quoted by the contractor is deemed to be inclusive of cost of MS sheet of size 300mmX 300mmX3mm size, fixed with necessary nuts and bolts on angle iron of size 40X40x5mm & length 600mm and grouted in the ground with PCC (1:3:6 using 20mm crushed stone aggregate of size 200mmX200mmX250mm including necessary earth work for marking the result. (iv) Soil conductivity will be chcked prior to proceeding for earthing so as to ascertain 2 ohm earth resistance with above specification.

Supply and installation in replacement of dropout / lift off explusion fuse out door type fuse link suitable for vertical or horizontal installation consisting of galvanised iron channel base having 2 numbers 33 KV post type insulator per stack and 2 numbers of such stack per phase complete with fuse carrier Teflon tube bakelite heavy tinned non ferrous metal parts and springs loaded phosphorous bronze contacts complete confirming to relevant IS complete all as specified and directed.

DEORA ELECTRIC WORKS

R.K.ASSOCIATES