REPAIR/MAINTENANCE OF RMUS, DISTRIBUTION TRANSFORMER, EXTERNAL ELECTRICAL DISTRIBUTION SYSTEM INCLUDING REPAIR/CALIBRATION OF RELAYS, METERS AND OTHER ALLIED WORKS AT CTW, INS VISWAKARMA, BV YARD, OLD MO(V), ABE PARK, CQAE UNDER GE (U-I) (V)

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 out the transformer/Voltage stabiliser indoor/ outdoor type of capacity 500 KVA to 750 KVA, 11 KV/433KV, step down any make for carrying out complete overhauling which shall comprise of the following:-

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 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 directed by Engr-in- charge.

e) Lifting and refixing 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) Refixing 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.

j) The inspection of transformer shall involve:- i) Checking of all clamps, nuts, bolts including core bolts & cover fixing bolts. Ii) Checking all brazings, joints, tap heads and connection joints. iii) Checking all jumpers, terminations/ connections inside the transformer. iv) Checking the Bucholtz relay/ conservator MOG if any. v) Painting of transformer 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 bucholtz relay/ MOG if any etc will be measured and paid separately.

All as per Item No. 1 herein before but transformer/Voltage stabiliser indoor/ outdoor type of capacity 250 KVA to 400 KVA

All as per Item No. 1 herein before but transformer/Voltage stabiliser indoor/ outdoor type of capacity 100 KVA to 200 KVA

Filtration 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 in to the conservator tank/ body tank of the transformer/ OCB/ FRMUs etc at various locations complete all as directed by the Engineer-in-Charge. [Make: Power oil/ Transol/ Savita Chemicals]

M&L for rewinding of distribution (HT/LT) transformers of capacity ( 500 KVA to 750 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 rewinding of distribution (HT/LT) transformers of capacity ( 100 KVA to 400 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 ( 100 KVA to 750 KVA) / size/ type 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 per IS 1986-87 and as directed by Engr-in- charge.

Disconnection of the Distribution Transformer from HT and LT supply mains, removing of Bus duct and Bus bar, Leakage arresting to following transformers 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, refixing of accessories and cover, filling of transformer oil complete, and making cable connections and for energising the transformer. (Cost includes materials like gaskets and oil seals and labour, the Bushing and bushings rods to be measured and paid separately).

(b) 500 kVA to 750 kVA

(c) 250 kVA to 400 kVA

(d) up to 200 KVA

Disconnecting the HT/LT connections of following transformers 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 Meggar test, Ratio Test, Magnetic Balance test and short circuit tests for checking the condition of transformer complete and test results shall be submitted by the contractor. Note:- (i) If the transformer found satisfactory then HT/LT connections shall be done by the contractor and has to charge the transformer. (ii) If the transformer fails in these tests then the contractor has to shift the transformer for winding /overhauling. (iii) Cost of Transportation / winding / overhauling is exclusive of rate quoted by the contractor.

(b) 500 kVA to 750 kVA

(c) 250 kVA to 400 kVA

(d) up to 200 KVA

Shifting the Transformer from existing site to another site within 3 Km distance range by Dismantling of HT and LT cables, jumpers and bus bars including LT busbar cable boxes and close the transformers for loading in to Vehicle with the help of crane, transportation to another site, unloading, cable connections both HT and LT, testing and commissioning.

(a) 500 kVA to 750 kVA

(b) 250 kVA to 400 kVA

(c) up to 200 KVA

M&L for replacement of Silica gel breather assembly complete with breather unit and silica gel including connecting with proper necessary gaskets if necessary, including removing the unserviceable breather assembly.

(a) 500 kVA to 750 kVA

(b) 250 kVA to 400 kVA

(c) up to 200 KVA

M&L for replacement of Conservator tank complete unit and including connecting with proper necessary gaskets if necessary, including removing the unserviceable Conservator tank.

(a) 500 kVA to 750 kVA

(b) 250 kVA to 400 kVA

(c) up to 200 KVA

M&L for replacement gun metal drain valves of transformers of following capacities including dismantling old one:- MAKE :- UPADHYAY/ LEADER/ ZOLOTO

(a) 500 kVA to 750 kVA

(b) 250 kVA to 400 kVA

(c) up to 200 KVA

Supply and fix in repairs off load tap changer assembly suitable for any make with 7 tapping position including opening top cover, conservator etc.

(a) 500 kVA to 750 kVA

(b) up to 400 KVA

Supply and replacement of (WTI) Winding Temperature Indicator of following distribution transformers including dismantling old one

(a) 500 kVA to 750 kVA

(b) up to 400 KVA

Supply and replace LT Bushings made out Porcelain and suitable length/size all as per existing, complete the following capacity distribution transformers of any make/size/type all as directed including dismantling old one.

(a) 500 kVA to 750 kVA

(b) 250 kVA to 400 kVA

(c) up to 200 KVA

Supply only HT Bushings made out Porcelain and suitable length/size all as per existing, complete the following capacity distribution transformers of any make/size/type all as directed including dismantling old one.

(a) 500 kVA to 750 kVA

(b) 250 kVA to 400 kVA

(c) up to 200 KVA

Supply only LT Bushing rod made out of Brass/Copper with threading and suitable length/size all as per existing metal parts / bolts etc, complete the following capacity distribution transformers of any make/size/type all as directed including dismantling old one.

(a) 500 kVA to 750 kVA

(b) 250 kVA to 400 kVA

(c) up to 200 KVA

Supply only HT Bushing rod made out of Brass/Copper with threading and suitable length/size all as per existing including metal parts / bolts etc, complete the following capacity distribution transformers of any make/size/type all as directed including dismantling old one.

(a) 500 kVA to 750 kVA

(b) 250 kVA to 400 kVA

(c) up to 200 KVA

M&L for replacement of (OTI) Oil Temperature indicator of following distribution transformers including dismantling old one.

(a) 500 kVA to 750 kVA

(b) 250 kVA to 400 kVA

(c) up to 200 KVA

M&L for replacement of Drain plugs to valves/conservator caps of the sizes 3/4", 1", 1.5" valves and plugs of the following capacity distribution transformers of any make/size/type all as directed including dismantling old one.

(a) 500 kVA to 750 kVA

(b) 250 kVA to 400 kVA

(c) up to 200 KVA

M&L for replacement of Oil gauge glass with gaskets of the following capacity distribution transformers of any make/size/type all as directed including dismantling old one.

(a) 500 kVA to 750 kVA

(b) 250 kVA to 400 kVA

(c) up to 200 KVA

M&L for preparation of old painted surfaces of transformers with coarse cloth/ brush and painting throughout externally on exposed surfaces with two coats of smoke grey colour synthetic enamel paint including writing of transformer details on plinth in white enamel paint on black enamel paint back ground complete including one coat of white wash for base foundation all as specified and directed by Engineer-in-charge for the following capacity in-door/ out-door type transformer:-

(a) 500 kVA to 750 kVA

(b) 250 kVA to 400 kVA

(c) up to 200 KVA

Clearing of bushes/small plants up to root level around and surroundings areas E/M installations (i.e.Two Pole/ Four structures, outdoor-substation yards, pump house & Misc E/M installations etc) including surface dressing n.exc 15 cm deep and removing debris to a distance n.exc 50m complete all as directed

Surface dressing not exceeding 15 cm deep in soft/loose soil in outdoor substation yards complete all as specified and directed.

Supply and lay (spreaded loosely) Graded coarse aggregate of size 40 mm dia size in outdoor sub-station yards all as directed

Supply and lay (spreaded loosely) Graded coarse aggregate of size 20 mm dia size in outdoor sub-station yards all as directed

Excavation in trenches n.exc 1.5mtr wide and not exc 1.5mtr depth and getting out in Soft/loose soil all as directed.

Returning and filling in of excavated material ay type including spreading, leveling, watering and well ramming in layers not exceeding 25 cm each.

Removal of surplus excavated material of any type not exceeding 50 mtr and depositing where directed at a level not exceeding 1.5 mtr above the starting point.

M&L for Sand cushioning/sand covering for underground cable protection complete all as specified. Note: Punned thickness only will be measured and paid.

Supplying and laying reinforced precast concrete cable cover, class HV, Type 1, flat, size 300mmx l80mm x 40mm, laid along alignment of cable as protection to cable in trenches complete all as specified and directed by Engineer-in-Charge

M&L for GI pipe light grade 100 mm dia laid along road crossings / plinth protection with suitable fittings for cable protection or fixed to the pole/ Wall complete all as specified and directed by Engineer-in-Charge . Make : Surya Roshni Ltd / Tata / Jindal steel / Prakash

M&L for HDPE Pipe 100 mm dia as in cable protection or fixed to the pole/ Wall complete all as specified and directed by Engineer-in-Charge .

M&L cable jointing kit for 11 KV (Earthed) grade XLPE cable for outdoor end termination heat shrinkable type joint complete with jointing material and accessories suitable for size 3 core 120 to 185 Sqmm including testing after jointing complete all as directed . Make: M-Seal/ 3M/ Raychem/ Denson

M&L cable jointing kit for 11 KV (Earthed) grade XLPE cable for outdoor end termination heat shrinkable type joint complete with jointing material and accessories suitable for size 3 core 240 to 300 Sqmm including testing after jointing complete all as directed . Make: M-Seal/ 3M/ Raychem/ Denson

M&L cable jointing kit for 11 KV (Earthed) grade XLPE cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armored aluminium conductor cable of size 120 to 185 Sqmm including testing after jointing complete all as directed . Make: M-Seal/ 3M/ Raychem/ Denson

M&L cable jointing kit for 11 KV (Earthed) grade XLPE cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armored aluminium conductor cable of size 240 to 300 Sqmm including testing after jointing complete all as directed . Make: M-Seal/ 3M/ Raychem/ Denson

S&L XLPE insulated, screened, PVC bedded galvanised steel strip or wire armoured ,electric power cables heavy duty with aluminium conductor, 11000 Volts grade ( earthed) of size 3 core 95 Sqmm complete in trenches/ ducts/ on pole etc complete all as directed . Make: Universal/ CCI/ Finolex/Havells/RPG

S&L XLPE insulated, screened, PVC bedded galvanised steel strip or wire armoured ,electric power cables heavy duty with aluminium conductor, 11000 Volts grade ( earthed) of size 3 core 150 Sqmm complete in trenches/ ducts/ on pole etc complete all as directed . Make: Universal/ CCI/ Finolex/Havells/RPG

S&L XLPE insulated, screened, PVC bedded galvanised steel strip or wire armoured ,electric power cables heavy duty with aluminium conductor, 11000 Volts grade ( earthed) of size 3 core 185 Sqmm complete in trenches/ ducts/ on pole etc complete all as directed . Make: Universal/ CCI/ Finolex/Havells/RPG

S&L XLPE insulated, screened, PVC bedded galvanised steel strip or wire armoured ,electric power cables heavy duty with aluminium conductor, 11000 Volts grade ( earthed) of size 3 core 240 Sqmm complete in trenches/ ducts/ on pole etc complete all as directed . Make: Universal/ CCI/ Finolex/Havells/RPG

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. Note: The rate quoted deemed to be inclusive of transportation of equipment and charges for service engineer . The fault locator shall also be arranged by contractor.

M&L for repair and servicing of HT (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 the 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 directed. Note:-Rate quoted shall be inclusive of two coats of white wash on exposed concrete .

All as per item No. 45 above but for two pole structure

M&L cross arms, bracing, supports, clamps and back plates fabricated from structural steel sections including nuts, bolts, washers, welding, bending cold or hot, drilling holes for bolts in any shape or size as indicted and inclusive of one primer coat one under coat and two finishing coat of aluminium paint including dismantling old one. .

Servicing,Inspecting,checking,cleaning by using of blower,Lubrication ,greasing and carrying out preventive maintanance of RMU 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: (i) The rate quoted shall be deemed to include 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 etc.

Supply & fixing of the following parts of Schineider make RMU :

Self powered relay with O/C , S/C , E/F protection.Relay should have a 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- 1No

CT Ratio 200-100/1-1A for Incoming and CT Ratio 100-50/1-1A for outgoing, Class - 1.0, 2.5VA for metering and Class 10P10, 2.5VA for protection- 1Set

Cable termination bushing suitable for upto 1 RUN 3Cx185 Sq mm, XLPE cable- 1Set

Cable termination cover boots (Push on type) -1Set

Three Phase (R/Y/B) indicating lamps - 1Set

11KV/230V AC, 1KVA control transformer - 1No

Battery and battery charger, 12Ah, (I/P-230V AC, O/P - 24V DC) - 1No

Spring Charging motor

M & L notice plate of 1.6 mm thick mild steel sheet vitreous enameled white, with letters figures and conventional skull and bones in signal red colour and fixed with MS clamps bolts and nuts of approved size for HT 11 KV of size 25 x 20 cm

M & L for disc insulator porcelain vitreous brown 145 mm height & 225 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 including dismantling old one all as specified & directed.

Material 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 205 mm dia & 215 mm height, complete including dismantling old one all as specified

.- ditto- as per Sl Item No. 52, but post type insulator including dismantling old one.

Supply and install HT 11 KV, 200 Amp outdoor type gang operated single break switch Tilting type vertical mounting consisting of hot dip galvanised channel iron base having 2 Nos 11 KV Post type insulator in stack and 3 stack per phase copper or copper alloy high pressure heavily tinned contacts plated MS arcing horns capable of breaking the magnetizing current complete with horizontal connecting bar GI pipe as down rod levers coupling & operating handle with locking arrangement complete.

S & Install drop out lift OFF HT 11 KV, 200 Amp fuse link consisting of channel iron base having 2 Nos 11 KV post type insulators in stack & 2 stack per phase complete with fuse carrier of SRBP tube with heavily tinned non ferrous metal parts and spring loaded phosphor bronze contact complete manufactured as per IS 9385 Complete

M&L for earthing complete with GI earth plate electrode of size 60cm x 60cm x 6 mm thick buried directly in ground (earth pit not less than 2.25 m deep below ground level) with top edge of the plate not less than 1.5m below the normal ground level connected with GI strip 32 x 6mm by means of bolts, nuts, check nuts & washers of galvanized iron steel including necessary excavation and earth work in any type of soil, removing surplus soil to a distance not exc 50m, with and including PCC chamber in PCC (1:2:4), type B1,using (20mm graded stone aggregate), "mild steel angle iron frame" made out of MS angle iron of size 40x 40 x 6 mm thick duly painted with two coats of synthetic enamel paint over one coat of red oxide zinc chrome primer hinged with and including 6mm thick CI cover with handle, watering arrangement with funnel internally secured with wire mesh with 20mm dia medium grade pipe for watering 40mm dia light grade, GI pipe for lead protection in & including alternate layers of charcoal dust and common salt complete all as shown in electrical "plate No '3' and connected to earthing test point all as specified and indicated including testing on completion including retrieving old GI earth plate, CI cover, GI pipes, angle iron frame from existing earthing as directed.

S & F following spares of GOD 11 KV grade, 200 Amp rating in position as in repairs including testing after repairs

(a). Male contact

(b). Female contact

(c). Tinned copper flexible jumper

(d). MS Jumper carrier

(e). Back connector plate

M&L for replacement of Bucholtz relay for transformer of capacity 500 KVA to 750 KVA

Supply & fixing of Cable termination Boots HT 11 KV (Push on type) for Trasformer complete all as specified and directed.

Supply & fixing in replacement of Lightning arresters 11KV grade expulsion type complete with all fittings, Station class, discharge capacity 10 kilo amp complete all as specified and directed.

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