REPAIR / MAINT OF VCBS, RMUS, DISTR TRANSFORMERS, HT ELECTRICAL DISTR SYSTEM INCL REPAIR / CALIBRATION OF RELAYS, METERS AND OTHER ALLIED WKS AT NCB, 32 WEU / HF / DF AREA, CE OFC COMPLEX AND MGEDDA AREA UNDER AGE E/M NO-II OF GE (U-I) VISAKHAPATNAM

Amount

M&L for disconnecting carefully electrical connection from both HT/ LT (primary & secondary) sides of the transformer, keeping them at safe side and taking the transformer out from the plinth with the help of crane, indoor/ outdoor type of capacity 500 KVA to 630 KVA, 11 KV / 0.433 KV, step down any make for carrying out complete overhauling which shall comprise of the following:- (Contd...)

a) M&L for lifting, transporting, handling the transformer to workshop and opening top cover of the transformer by unscrewing nuts, bolts, washers etc. including disconnecting core assembly from HT/ LT bushing and lifting the same gently and taking out from the shell (container/ body) of the transformer. b) M&L for draining out transformer oil from the above said transformer in the suitable capacity of container / drums and keeping it in safe custody for reuse. c) M&L for cleaning the transformer body from inside, removing deposited dirt / sludge / foreign particles etc. from the bottom / body of the transformer with appropriate chemical solution and drying up the shell from inside before refilling of the transformer oil. d) M&L for cleaning and washing thoroughly core and windings of the transformer by hosing down with clean dry oil conforming to IS 335/1983, removing deposited dirt / sludge / foreign particles from the windings / core, thorough inspection of windings, providing insulations to leads and terminals, heating / drying / baking complete carefully and thoroughly inside the heating chamber at suitable temperature to obtain required value of insulation resistance etc. all as specified and as directed by Engr-in- charge. e) Lifting and re-fixing core assembly inside the transformer shell gently and carefully, connecting primary / secondary / Neutral connections to the bushings assembly, fixing of tap change over including tightening of nuts, bolts, washers of the core to reduce humming noise all as directed. f) Refilling the filtered transformer oil in the shell of transformer complete. g) Re-fixing the top cover including replacement of cork sheet / gasket 8mm thick, tightening of nuts / bolts / washers etc. and replacement of breather with silica gel crystal type all as directed by Engr-in charge h) Lifting / shifting to the place from where removed or to any location as directed and re-installing the transformer including connecting primary / secondary / neutral connections etc. all as directed by Engr-in-Charge. (Contd...)

j) The inspection of transformer shall involve:- i) Checking of all clamps, nuts, bolts including core bolts & cover fixing bolts. ii) Checking all brazing, joints, tap heads and connection joints. iii) Checking all jumpers, terminations / connections inside the transformer. iv) Checking the Buchholtz relay / conservator MOG if any. v) Painting complete with two coats of synthetic enamel paint externally transformer shell complete all as directed by Engr-in-Charge. (vi) Inspection of tap changer, checking the moving and fixed contacts for contact wear and connection to winding. k) Conducting the tests on core and windings as per IS like ratio, magnetic imbalance, short circuit etc. in presence of Engr-in-Charge and test results shall be signed both by the contractor and Engineer -in-Charge and kept on record. Note:- (i) Any damage to insulators / bushes / windings etc. while in the custody of the contractor shall be made good at no extra cost to Department. The serviceability of the transformer shall be checked and confirmed by the contractor before taking into his custody. (ii) M&L for rewinding / re-insulation of HT / LT (primary / secondary) coils, bushes, studs, Transformer oil, cable box, replacement of buchholtz relay / MOG if any etc will be measured and paid separately. (iii) Necessary gate pass duly signed by all concerned i.e JE, Engr-in-Charge & contractor should be taken while lifting / before taken in to costody of contractor foe handling workshop for repair. (iv) Guarentee / warrenty of the existing transformer to be verified by the Engr-in-Charge before lifting the equipment for repair. (v) Serviceable transformer Oil shall be duly certified by the Engr-in-Charge. (vi) Engr-in-Charge shall satisfy with serviceability of Transformer. No extra cost will be allowed for rectification of defect till expiry of defect liability period once carryout repairs of the transformer measured under this item.

All as per Item No. 1.00 above but transformer / Voltage stabiliser indoor / outdoor type of capacity up to 400 KVA

Filtration / De-hidration of transformer oil of transformers / FRMUs installed at various locations to achieve di-electric strength not less than 60 KV at 2.5mm gap as per relevant IS with portable filtration plant, testing of the oil for the di-electric strength before filtration and after filtration complete all as directed by the Engineer-in-Charge.

Supply and topping up of transformer oil with di-electric strength not less than 60 KV into the conservator tank / body tank of the transformer / OCB / FRMUs etc at various locations complete all as directed by the Engineer-in-Charge.

M&L for rewinding of distribution (HT/LT) transformers of capacity 50 to 630 KVA type by winding the defective coils with new copper wire as per I.S. of same gauge and existing size together with new insulated materials / bracings before placing in to the transformer and assembling the coil with new insulation and fitting the coils in the chamber, testing and commissioning the transformer and recording the test results complete all as directed. Note: M&L for re-insulation of serviceable coils will be measured & paid separately under relevant items.

M&L for re-insulating windings of HT / LT distribution transformers of capacity 50 to 630 KVA by strip opening of HT / LT coils (i.e. Primary / secondary coils) from core assembly safely, unwinding the HT / LT coils (i.e. Primary / secondary coils) complete, removing the old defective insulation paper and replacing with new DPC insulation to the copper conductor, re-varnishing of the windings with super varnish including heating, drying, backing complete carefully and thoroughly inside the heating chamber at suitable temperature to obtain required value of insulation resistance etc. all as directed by Engr-in- charge.

Disconnection of the distribution transformer of capacity 500 to 630 KVA from HT and LT supply mains, removing of Bus duct and Bus bar, leakage arresting by draining out of oil after arrangement of necessary empty oil drums, buckets etc.,dismantling of top cover and accessories, dismantling of LT bushings by disconnecting leads / jumpers from inside, replacement of gaskets and oil seals and re fixing of the LT bushings, making internal and external connections, replacement of cover gasket and accessories, reassembling of acessories and cover, filling back of existing transformer oil complete and making cable connections and assessing for energising the transformer complete all as specified and as directed. Note: (i) The rate quoted shall include cost of materials like gaskets and oil seals and labour etc. (ii) Bushing and bushing rods shall be measured and paid separately.

All as per Sl item No. 7.00 but Transformer of capacity 250 to 400 KVA

All as per Sl item No. 7.00 but Transformer of capacity upto 200 KVA

Disconnecting the HT/LT connections of transformer of capacity 500 to 630 KVA i.e (Bus duct / Cable bunch) keeping all the cables out from the HT/LT sides, physically checking the transformer for healthiness, performing the transformer tests like HV/LV Meggar test, Ratio Test, Magnetic Balance test and short circuit tests for checking condition of transformer complete all as specified and as directed. Note:- (i) All testing shall be done in presence of Engr-in-Charge or his accredited rep and test reports shall be signed by contractor and Engr-in-Charge and kept on record. (ii) If the transformer found satisfactory then HT/LT connections shall be done by the contractor and has to charge the transformer. (iii) If the transformer fails in these tests then the contractor has to shift the transsformer for winding /overhauling which will be measured and paid separately. (iv) Cost of winding / overhauling if required shall be measured and paid separately.

All as per Sl item No. 10.00 but transformer of capacity 250 to 400 KVA

All as per Sl item No. 10.00 but transformer of capacity upto 200 KVA

Shifting the Transformer of capacity 63 to 1000 KVA from existing site to another site within 3 Km distance range by Dismantling of HT and LT cable connections, jumpers and busbars including LT busbar cable boxes and closing the transformers for loading into transporting vehicle with the help of crane, transportation to another site, unloading, cable connections both HT and LT, testing and commissioning complete all as specified and as directed.

M&L for replacement of silica gel breather assembly complete suitable for 500 to 630 KVA transformer as per existing with breather unit and silica gel including connecting with proper necessary gaskets if necessary & removing the unserviceable breather assembly complete all as specified and as directed.

All as per Sl item No. 14.00 but transformer of capacity 250 to 400 KVA

All as per Sl item No. 14.00 but transformer of capacity upto 200 KVA

Supply and replacement of silica gel in breather of transformers all as specified and as directed.

S&F in repair conservator tank assembly suitable for transformer of capacity 250 to 400 KVA as per existing and including connecting properly with gaskets if necessary complete all as specified and as directed.

All as per Sl item No. 18.00 but suitable for up to 200 KVA transformer

S&F in repair gun metal drain valves suitable for transformer of capacity 250 to 400 KVA complete all as specified and as directed.

All as per Sl item No. 20.00 but suitable for up to 200 KVA transformer

S&F in repairs off load tap changer assembly suitable for transformer of capacity 400 to 500 KVA as per existing with 7 tapping position including opening top cover, conservator etc complete all as specified and as directed.

All as per Sl item No. 22.00 but suitable for up to 63 to 315 KVA transformer

S&F in repair WTI (Winding Temperature Indicator) suitable for distribution transformer of capacity 400 to 500 KVA as per existing complete all as specified and as directed.

All as per Sl item No. 24.00 but suitable for up to 63 to 315 KVA transformer

S&F in repair LV bushings made out of porcelain, as per existing and suitable for distribution transformer of capacity 500 to 630 KVA complete all as specified and as directed.

All as per Sl item No. 26.00 but suitable for 250 to 400 KVA transformer

All as per Sl item No. 26.00 but suitable for up to 200 KVA transformer

S&F in repair HV bushings made out of porcelain, as per existing and suitable for distribution transformer of capacity 500 to 630 KVA complete all as specified and as directed.

All as per Sl item No. 29.00 but suitable for 250 to 400 KVA transformer

All as per Sl item No. 29.00 but suitable for up to 200 KVA transformer

S&F in repair LV bushings rod made out of copper with threading, as per existing and suitable for distribution transformer of capacity 500 to 630 KVA complete all as specified and as directed.

All as per Sl item No. 32.00 but suitable for 250 to 400 KVA transformer

All as per Sl item No. 32.00 but suitable for up to 200 KVA transformer

S&F in repair HV bushings rod made out of copper with threading, as per existing and suitable for distribution transformer of capacity 500 to 630 KVA complete all as specified and as directed.

All as per Sl item No. 35.00 but suitable for 250 to 400 KVA transformer

All as per Sl item No. 35.00 but suitable for up to 200 KVA transformer

S&F in repair OTI (Oil Temperature indicator) as per existing suitable for distribution transformers of capacity 500 to 630 KVA complete all as specified and as directed.

All as per Sl item No. 38.00 but suitable for 250 to 400 KVA transformer

All as per Sl item No. 38.00 but suitable for up to 200 KVA transformer

M&L for providing new cable box made out of MS sheet of thickness not less than 3.15 mm including fabrication works, welding etc. to suit the LT/HT side of existing transformer size, including nuts, bolts, cable glands, termination of existing cables etc. as per existing and suitable for distribution transformer of capacity 500 to 630 KVA complete all as specified and as directed

All as per Sl item No. 41.00 but suitable for 250 to 400 KVA transformer

All as per Sl item No. 41.00 but suitable for up to 200 KVA transformer

M&L for replacement of Drain plugs to valves/conservator caps of the sizes 3/4", 1", 1.5" valves and plugs, as per existing suitable for distribution transformers of capacity 500 to 630 KVA and complete all as specified and as directed.

All as per Sl item No. 44.00 but suitable for 250 to 400 KVA transformer

All as per Sl item No. 44.00 but suitable for up to 200 KVA transformer

S&F in repair Oil gauge glass with gaskets as per existing suitable for distribution transformers of capacity 500 to 630 KVAcomplete all as specified and as directed.

All as per Sl item No. 47.00 but suitable for 250 to 400 KVA transformer

All as per Sl item No. 47.00 but suitable for up to 200 KVA transformer

M&L for preparation of old exposed painted surfaces of indoor / outdoor type transformer of capacity 500 to 630 KVA and painting the same with two coats of synthetic enamel paint including writing details of transformer on transformer plinth / base with white synthetic enamel paint on black synthetic enamel paint back ground complete & including one coat of white wash on exposed surface of transfomer plinth / base complete all as specified and as directed. Note :- Colour of paint shall be as decided by Engr-in-Charge.

All as per Sl item No. 50.00 but for transformer of capacity 250 KVA to 400 KVA

All as per Sl item No. 50.00 but for transformer of capacity up to 200 KVA

Clearing away all bushes, small plants, grass, vegetation, saplings, shrubs, brushwood, undergrowth, roots upto root level including surface dressing n.exc 15 cm deep around and surroundings areas of E/M installations (i.e.Two Pole/ Four structures, outdoor-substation yards, pump house & Misc E/M installations etc) and removing rubbish / debris upto a distance of not less than 50 metres outside the periphery of the area under clearance complete all as directed.

Excavation in trenches, not exc 1.5 m wide and not exc 1.5 m in depth; for foundation, etc. or for shafts, wells, cesspits, manholes, pier holes, etc. n exc 10 sq m on plan and n exc 1.5 m in depth and getting out all excavated material in soft / loose soil complete all as specified and directed.

Returning, filling in trenching with soil and including spreading, levelling, watering and well ramming in layers not exceeding 25 cm thick complete all as specified and as directed.

Removing of excavated surplus soil to a distance n. exc 50 m and depositing where directed at a level n. exc. 1.5 m above the starting point complete all as specified and directed.

M&L sand cushioning with clean and dry stone crushed stone dust in trenches for protection of UG cable and including punning down complete all as specified and directed. Note:- Punned thickness of stone dust coushioning shall only measured and paid.

Supplying and laying un-reinforced precast concrete cable cover, class HV, Type 1, flat, of size 300mmx 180mm x 40mm, laid along alignment of cable as protection to cable in trenches complete all as specified and directed.

S&F 100 mm bore dia galvanised steel tubing, light grade, laid under road crossing, for cable protection or fixed to poles, walls or laid under floors including taking down existing un-serviceable pipe of any description. complete all as specified and directed.

M&L cable jointing kit for 11 KV (Earthed grade) 3 core XLPE armoured aluminium conductor cable of size 120 to 185 sqmm for outdoor termination, heat shrink type joint complete with jointing material and accessories complete all as specified and directed.

All as per Sl item no. 60.00 above but for cable of size 95 sqmm

M&L cable jointing kit for 11 KV (Earthed grade) 3 core XLPE armoured aluminium conductor cable of size 120 sqmm to 185 sqmm for straight through, heat shrink type joint with jointing material and accessories complete all as specified and directed.

All as per Sl item no. 62.00 above but for cable of size 95 sqmm

M&L cable jointing kit for 11 KV (Earthed grade) 3 core XLPE armoured aluminium conductor cable of size 120 sqmm to 185 sqmm for indoor termination, heat shrink type joint complete with jointing material and accessories complete all as specified and directed.

All as per Sl item no. 64.00 above but for cable of size 95 sqmm

Supply & laying XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with aluminium conductor, 11000 volts, Earthed, grade cross sectional area 185 Sqmm, 3 core, laid in trenches / duct / on pole / on wall including taking out existing unserviceable cable complete all as specified and directed.

All as per Sl item no. 66.00 above but for cable of size 120 sqmm

All as per Sl item no. 66.00 above but for cable of size 95 sqmm

M&L for detecting HT 11KV UG cable faults located in any stretch / depth with sophisticated cable fault locator consisting of microprocessor based pre-locator system, HV surge generator, fault pin point surge wave receiver, cable identification instrument , cable tracer for exact location of under ground cable routes complete all as directed. Note:- The rate quoted deemed to be inclusive of arrangement of necessary fault locator equipment, transportation of equipment & charges for service engineer.

M&L for repair and servicing of HT 11 KV four pole structure by replacing Aluminium PG clamps, GI bolts and nuts, pieces of ACSR conductor with insulation sleeve RYB of any size as jumpers including lubricating the moving parts of AB switch and cleaning of all disc and pin insulators and applying silicon compound for prevention of arcing due to dust / salt deposits over surfaces including preparation of surfaces, applying zinc chromate primer on rusted surfaces and applying one coat of aluminum paint to the entire structure complete all as specified and as directed. Note : Rate quoted shall be inclusive of two coats of white wash on exposed concrete surfaces of structure.

All as per Sl item No. 70.00 but for two pole structure

S&F in repair danger notice plate of size 25 x 20 cm & 1.6mm thick mild steel sheet, vitreous enameled white, with letters, figures and conventional skull and bones in signal red colour and fixed with M.S. clamps, bolts and nuts of approved size for HT compete all as specified and as directed.

M&L cross arms, bracings, supports, clamps and back plates fabricated from structural steel sections and including nuts, bolts, washers, welding, bending cold or hot, drilling holes for bolts, in any shape or size as indicated or directed and including preparation of surfaces and applying two coats of aluminium paint over a coat of primer and dismantling complete all as specified and directed.

S&F in repair disc insulator porcelain vitreous brown 145 mm height & 255 mm dia ball and socket type two in series assembly with cast aluminium 4 U bolt tension hardware and tension clamps for conductors working pressure HT 11 KV complete all as specified and as directed.

S&F in repair for pin insulator porcelain vitreous brown insulator including one galvanised mild steel spindle two galvanised iron washers and one galvanised iron nut for 11000 volts grade 150 mm dia & 150 mm height complete all as specified and as directed.

All as per Sl item No. 74.00 but for post type insulator

S&F in repair switches air break, gang operated triple pole, mechanically operated, mounted on insulator and steel frame, with operating mechanism worked from ground level, for current rating upto 200 amps, 11000 volts all as per clause no 19.69 of SSR part-I (2009) complete all as specified and directed.

All as per Sl item No. 77.00 but for current rating upto 400 amps

S&F in repairs male contact suitable for GOD 11 KV grade, 200 Amp rating & of make as per OEM complete all as specified and as directed.

S&F in repairs Female Contact suitable for GOD 11 KV grade, 200 Amp rating & of make as per OEM complete all as specified and as directed.

S&F in repairs Tinned copper flexible jumper suitable for GOD 11 KV grade, 200 Amp rating & of make as per OEM complete all as specified and as directed.

S&F in repairs MS Jumper carrier suitable for GOD 11 KV grade, 200 Amp rating & of make as per OEM complete all as specified and as directed.

S&F in repairs Back connector plate suitable for GOD 11 KV grade, 200 Amp rating & of make as per OEM complete all as specified and as directed.

Supplying and laying synthetic rubber insulated mats 2.5 mm thick for voltage upto 11 kv for electrical purpose as per IS 15652-2006, (superseding IS 5424) suitable for electrical shock safety of sizes 2m x 1m including taking down complete all as specified and directed.

Servicing, Inspecting, checking, cleaning by using of blower, lubrication, greasing and carrying out preventive maintanance of RMU of capacity 11 KV, 250 / 350 MVA including calibrating the relay by conducting secondary injection tests and RMU in serviceable condition, testing and commissioning all as specified and as directed by the Engineer-in-Charge. Notes: Unit rate quoted shall be deemed to include cost for necessary T&P, nuts, bolts, washers, gasket, insulation tape, compound, painting of RMU panels with approved colour including lettering details all as per exisitng.

S&F in repair Self powered relay with O/C, S/C, E/F protection, having front USB port for laptop interface, LCD display,10 event records, 5 fault records, min 2 setting group and keypad for setting parameters for the relay complete suitable for RMU of capacity 250/350 MVA all as specified and as directed.

S&F in repair phase indicator lamps (Red, Yellow and blue) suitable for RMU of capacity 250/350 MVA complete all as specified and directed.

S&F in repair 11KV, 230V, AC, 1KVA control transformer suitable for RMU of capacity 250/350 MVA complete all as specified and directed.

S&F in repair Battery, 12Ah, (I/P-230V AC, O/P - 24V DC suitable for RMU of capacity 250/350 MVA complete all as specified and directed.

S&F in repair Spring charging motor suitable for RMU of capacity 250/350 MVA complete all as specified and directed.

S&F in repair vaccum interrupter type VG1, VG2 or VG4 suitable for RMU of capacity 250/350 MVA complete all as specified and directed.

S&F in repair lightning arresters expulsion type complete with all fittings, station class, discharge capacity 10 kilo amp suitable for 11000 volts complete all as specified and directed.

M&L earthing complete with galvanised steel earth plate electrode of size 600 x 600 x 6 mm thick buried directly in ground in vertical position (earth pit not less than 2.25 m deep below the normal ground level) with top edge of the earth plate not less than 1.5 m below normal ground level, connected to earth lead of galvanised iron strip 32 x 6 mm by means of bolts, nuts, check nuts and washers of galvanised iron or steel, all as shown in electrical plate No. 3 connected to earthing test point including dismantling un-serviceable earthing complete all as specified and directed. Note:- The unit rate shall also include for earth work in any type of soil, PCC 1:3:6 type C1 chamber, RCC 1:1.5:3, type A1 cover slab, 50 mm thick reinforced with 8 mm dia TMT bar @ 140 mm C/C both ways, 10 mm dia plain bar lifting handle embedded in cover slab, Main earthing lead from earth electrode to test point upto 7.5 m length, 20 mm bore medium grade GI watering pipe, 40 mm bore GI medium grade earth lead protection pipe, funnel, wire mesh, copper lugs, charcoal and common salt in alternate layer etc.

S&F in repair earth continuity conductor or main earthing lead using 32 x 6 mm galvanised iron strip, fixed to wall on batten or recess or chases or buried in ground or drawn in conduit / pipe or fixed to poles or any other indicated situation for loop earthing etc. as required complete all as specified and directed.

All as per Sl item no. 94.00 above but 32 x 6 mm copper strip

M&L for taking down 11KV, 630 Amp RMU, transporting to workshop (OEM Factory) from sub station, opening gas chamber, supply & filling of SF6 gas, sealing back gas chamber & re-assembling by authorised technical rep of OEM, bringing back RMU to site safely and re-installing the same including testing and commissioning complete all as specified and directed. Note:- The unit rate qouted against this items shall be deemed to include cost of transportation of RMU for both sides.

M/s NATIONAL ENGINEERING CONSTRUCTIONS CO (BID ID -3326270)

SRIESWARI ENTERPRISES (BID ID -3326147)

PNR CONSTRUCTIONS (BID ID -3323079)

SVG SUPPLIES (BID ID -3330426)

ANVITHJAY CONSTRUCTIONS (BID ID -3326459)