Providing Annual Maintenance of Transformer substation and allied works at various Telephone Exchanges in Kerala Circle

Amount

Package 1- TE Tripunithura 2 x 400 KVA Indoor Oil cooled Sub-station

Supplying and filling of tested quality fresh transformer oil suitable for 11 KV system to replace the damaged oil /topping up etc complete as required

Filtering of Transformer oil of 2 Nos 400 KVA Indoor Transformer & HT OCB Panel up to desired value of dielectric strength, i/c arranging to and fro transportation of external filtering unit to the site, furnishing the test certificate of approved agency, etc complete as reqd.

Supply and replacing breather with fresh silica gel for the existing 160 KVA transformer etc complete as required

Cleaning and servicing of 11kV, HT OCB panel comprising of 2 Nos. 400A, 250 MVA Southern Switchgear limited make 11kV Oil Circuit Breaker and 1 No. 400A Oil Switch after disconnecting the supply i/c washing of accumulation of sludge/ deposits in the arc control pit with clean oil, cleaning of accumulation of carbon deposit on contacts, checking of all insulators tightening all connections with bus bar, switches, cables etc, checking for smooth functioning of open/ close operations, cleaning and applying petroleum jelly on fixed contacts, checking functions of space heater and thermostats, replacing the faulty space heater with new one (70W/80W) if required, checking and correcting of trip circuit healthy indication, ON/OFF indications, replacing minor components, de moisturising the HT bus bar chamber with hot air blow, taking I R readings and recording etc complete as required.

Arresting the oil leak through the HT bush of the HT oil switch of the existing 3 panel HTPanel i/c opening the oil swich chamber other accessories after draining out oil, rectification of leak through HT bush, replacing all the required gaskets/ washer, reassembling all accessories back to the panel, re filling transformer oil etc complete as required.

Painting of the 4-pole structure with connected MS channels, angle iron, connecting rods of AB switches, cable protection pipe and other accessories, etc with one coat of superior quality aluminium paint after thoroughly cleaning the surface for removing dust, rust etc, applying zinc chromate primer where ever required, cleaning the insulators, checking/ tightening the overhead connections/ lines on pole structure from metering end to transformer , colour washing of the foundations of 4pole structure, metering kiosk, fensing etc ( if required) with two coats of superior quality water based cement paint of approved colour after complete cleaning of the surface for removing dust, must, old paint etc as required.etc complete as required.

Painting the existing TOD Meter Kiosk i/c complete cleaning, removing dust, dirt, rust etc , applying zinc chromate primer where ever required, followed by one coat of superior quality grey synthetic enamel paint etc compete as required

Complete painting of the angle iron welded mesh fencing around the pole structure i/c MS channel supports, MS weld wire mesh door etc with One coats of epoxy primer followed by two coats of superior quality Aluminium paint after complete cleaning the surface for removing dust, rust etc complete as required

Servicing of 11KV air break switch and the lever mechanism in the existing 11 KV pole structure for smooth operation of open close operations i/c cleaning, greasing the moving contacts, checking connections in the pole structure and switch, testing, etc complete as reqd.

Checking the existing 11 KV HT structure , 2 Nos 11KV/415V, 400 KVA indoor transformers, HT insulators, LAs, DO fuses, HT jumper connections, LT cables i/c cleaning , meggering the same with insulation megger of suitable rating ( 1000V -LT/5000V-HT) , cleaning of all contacts ,applying petroleum jelly , tightening of all HT & LT terminations ,earth connections, measuring the earth resistance , cleaning of 2 Nos 400 KVA transformers etc as complete required. (Note : Testing shall be done in the presence of Engineer in charge or his authorised subordinate and necessary test result should be submitted)

Cleaning the joints of the existing earth stations and reconnecting, replacing corroded nut and bolts with new steel nuts & bolts, washers etc complete as required.

Removing the grass, vegetation roots, bushes, creepers and climbers , debris , cleaning, inside the existing HT structure yard and outside surrounding area , cleaning , filtering, levelling the stone aggregate, etc complete as required.

Supply and replacing of following faulty items in the 11 kV structure i/c dismantling existing faulty accessories after checking, meggering etc as required.

11 kV Post top insulators

DO Fuse metal parts ( Full set)

11 KV Lightning Arrester

S/L of zero gauge copper conductor on the HT structure from AB switch to transformer i/c dismantling the broken one, tying the new one with HT insulators etc as required

Servicing the following rating Air Circuit Breakers (ACBs) in the main MV Panel , drawing out the ACB, carrying out the standard servicing i/c lubricating the moving parts, correcting the alignment, decarbonising the contacts, checking & adjusting the contacts pressure, checking & correcting the interlocking mechanism , insert the ACB back to the panel, release testing in case the ACB is equipped with protection release etc complete as per the site requirement.

1000 A ACB (M/s SIEMENS)

Checking, correcting and testing of pick up time and closing time of IDMT relay ( 2 Nos of over current and 1 No of earth fault relay) by injecting 5 amps current using testing kit i/c checking and correcting connected control wiring in the LT/HT panel, Checking shunt trip circuit, auxiliary switch, trip healthy indication , trip push button etc as required.

Servicing of following Electrical panels including cleaning the inside dust, checking and tightening all the connections such as bus bar, cables, tighten switch terminals, taping, etc I/c removing dust deposit using vacuum cleaner and minor repairs of switches if reqd., etc, replacement of fused indication lamps/defective lamp holders and control fuses, replacement of missing thumb screws etc as reqd.( Note : This work does not involve sevicing of LT ACB)

a] MV Panel

Incoming

i) 1000 ACB- 5 Nos. (I/c 1 no. bus coupler)( Make: M/s SIEMENS)

Outgoing

i) 800A TPN MCCB - 2 Nos ii) 400A TPN SDF - 2 Nos. iii) 250A TPN SDF - 4 Nos. iv) 200A TPN SDF - 2 Nos.

b] Capacitor Panel

50 KVAR APFC panel with 6 Nos capacitors of various sizes with contactors,relays,indication lamps etc.

Complete as above( a to b)

Supply and fixing the following items to replace the faulty one i/c giving connection , testing etc as required

Supplying and fixing fire retardant electrically insulated, non skid type with fluted top and plain bottom or top with chequered finish synthetic mat suitable for all voltages not exceeding 11KV (dielectric strength) Confirming to BIS/IS standards, having minimum width of 1000 mm +/- 20 mm .

S/F hand gloves suitable for operation of HT equipment of superior quality etc as required.

Supplying and fixing earth discharge rod with suitable length of flexible copper wire for earthing 11KV DP structures /HT cable etc as reqd.

S/F of 18 W, 4 feet LED batten tube light fitting on the existing ball & socket arrangement / wall / ceiling / inside the existing fluorescent light fitting, making connection, testing, etc as required. (Note: For DG Set room & Sub-Station area only)

Supplying and fixing following piano type switch / socket on the existing switch box/ cover including connections etc as required. (Note: For DG Set room & Sub-Station area only)

5/6 amps switch

3 pin 5/6 amp socket outlet

15/16 amp switch

6 pin 15/16 amp socket outlet

Complete cleaning of the existing sub station room of approximate size 12 M (L) x 7 M ( W) x 4.75 M (H) to remove the sand & dust on the floor , spider nets on wall & ceiling , remove other minor debris from the sub station room to have better look & neat appearance etc complete as required

Description of Work / Item(s)

Amount

Package 2- DTS Building Eranakulam 2 x 400 KVA Indoor Oil cooled Sub-station

Supplying and filling of tested quality fresh transformer oil suitable for 11 KV system to replace the damaged oil /topping up etc as required

Filtering of Transformer oil of 2 Nos 400 KVA Indoor Transformer & HT OCB Panel up to desired value of dielectric strength, i/c arranging to and fro transportation of external filtering unit to the site, furnishing the test certificate of approved agency, etc as reqd.

Supply and replacing breather with fresh silica gel for the existing 400 KVA transformer etc as required

Recharging the breather using fresh silica gel after removing the hydrated gel, cleaning the assembly, refilling with new gels, refixing, etc as reqd.

S/F oil level glass indicator of the 400 KVA transformer i/c replacing the damaged one etc as required

Cleaning and servicing of 11kV, HT OCB panel comprising of 2 Nos. 400A, 250 MVA M/s Southern Switchgear Limited make 11kV Oil Circuit Breaker and 1 No. 400A Oil Switch after disconnecting the supply i/c washing of accumulation of sludge / deposits in the arc control pit with clean oil, cleaning of accumulation of carbon deposit on contacts, checking of all insulators tightening all connections with bus bar, switches, cables etc, checking for smooth functioning of open/close operations, cleaning and applying petroleum jelly on fixed contacts, checking functions of space heater and thermostats, replacing all the faulty space heater with new one (70W/80W) , checking and correcting of trip circuit healthy indication, ON/OFF indications, replacing minor components, de moisturising the HT bus bar chamber with hot air blow, taking I R readings and recording etc as required.

Cleaning the joints of the existing earth stations and reconnecting, replacing corroded nut and bolts with new steel nuts & bolts, washers etc as required.

Servicing of following Electrical panels including cleaning the inside dust, checking and tightening all the connections such as bus bar, cables, tighten switch terminals, taping, etc I/c removing dust deposit using vacuum cleaner and minor repairs of switches if reqd., etc, replacement of fused indication lamps/defective lamp holders and control fuses, replacement of missing thumb screws etc as reqd.

a] MV Panel

Incoming

i) 800 ACB- 3 Nos. (I/c 1 no. bus coupler)( Make: English Electric)

ii) 630 Amps TPN SDF Switch - 2Nos (with common key)

Outgoing

i) 630A TPN SDF - 1 No ii) 400A TPN SDF - 9 Nos iii) 250A TPN SDF - 2 Nos. iv) 100A TPN SDF - 5 Nos. v) 63A TPN SDF - 8 Nos.

b] Capacitor Panel

135 KVAR , 9 stage APFC panel with contactors, relays etc.

Complete as above

Servicing the following rating Air Circuit Breakers (ACBs) in the main MV Panel , drawing out the ACB, carrying out the standard servicing i/c lubricating the moving parts, correcting the alignment, decarbonising the contacts, checking & adjusting the contacts pressure, checking & correcting the interlocking mechanism , insert the ACB back to the panel, release testing in case the ACB is equipped with protection release etc complete as per the site requirement.

800 A ACB (M/s English Electric)

Supply and fixing the following items to replace the faulty one i/c giving connection , testing etc as required

Supplying and fixing fire retardant electrically insulated, non skid type with fluted top and plain bottom or top with chequered finish synthetic mat suitable for all voltages not exceeding 11KV (dielectric strength) Confirming to BIS/IS standards, having minimum width of 1000 mm +/- 20 mm .

Checking, correcting and testing of pick up time and closing time of IDMT relay ( 2 Nos of over current and 1 No of earth fault relay) by injecting 5 amps current using testing kit i/c checking and correcting connected control wiring in the LT/HT panel, Checking shunt trip circuit, auxiliary switch, trip healthy indication , trip push button etc as required.

Arresting the oil leak through the HT bush of the HT oil switch of the existing 3 panel HTPanel i/c opening the oil swich chamber other accessories after draining out oil, rectification of leak through HT bush , replacing all the required gaskets/washer, reassembling all accessories back to the panel , re filling transformer oil etc complete as required.

Arresting the oil leak through secondary side LT bush of 400 KVA Transformer ( TR-1) i/c dismantling and removing of conservator tank and other accessories, lifting of top cover after draining out oil, rectification of leak through LT bush , replacing all the required gaskets/washer, reassembling all accessories, re filling transformer oil etc complete as required.

S/F hand gloves suitable for operation of HT equipment of superior quality etc as required.

S/F of 18 W, 4 feet LED batten tube light fitting on the existing ball & socket arrangement / wall / ceiling / inside the existing fluorescent light fitting, making connection, testing, etc as required. (Note: For DG Set room & Sub-Station area only)

Supplying and fixing following piano type switch / socket on the existing switch box/ cover including connections etc as required. (Note: For DG Set room & Sub-Station area only)

5/6 amps switch

3 pin 5/6 amp socket outlet

15/16 amp switch

6 pin 15/16 amp socket outlet

Description of Work / Item(s)

Amount

Package 3- TE Central Thrissur 2x315 KVA Indoor Oil cooled Sub-station

Filtering of Transformer oil of 2x315 KVA in door Transformers, OCB / PT up to the desired value of dielectric strength, i/c arranging To and fro transportion of external filtering unit suitable to the site, furnishing the test certificate of approved agency etc as reqd.

Supplying and filling transformer oil for topping up the oil in the existing 11 KV in door 315 KVA Transformer, PT, OCB etc as reqd.

Recharging the breather using fresh silica gel after removing the hydrated gel ,cleaning the assembly, refilling with new gels, refixing etc as reqd.

Servicing the existing 11 KV, 3 Panel OCB 400Amps (make : Bieco Lawrie) with 1 incoming & 2 Outgoings HT Panel i/c cleaning the entire panel, after scrapping the inside and outside surface of the accessible area of the Panel with water paper and removing the dust, rust, and moisture contents, tightening nuts and bolts of the Bus bars, cable terminals and spouts, and improving the IR value by heating with a hot air blower after cleaning of accumulation of carbon deposits with CTC (Carbon Tetra Choride ), heating the interior of the panel board to expell moisture, applying two coats of moisture resistant winding varnish for all HT spouts and resin cast CTs, applying petroleum jelly in the fixed contacts of OCBs , greasing the moving parts of OCB , reconnecting properly, etc i/c checking the control wiring and trip circuit, testing etc. i/c cleaning & removing the rust on surface of panel , providing one coat of superior quality spray enamel paint on accessible area of panel, sign writing etc complete as reqd.

Servicing of existing OCB in the LT panel i/c cleaning / checking all componets, mechanical parts, all moving and fixed contacts, auxilary contacts, all connections of CTs, control wiring, replacement of the minor components like springs , mechanical parts etc . i/c Lubricating all mechanical parts, cleaning contact tips, applying petroleum jelly on all contacts, refixing testing etc as required ( Work should be carried out by a qualified and skilled technician)

Spray painting the outside of the 315 kVA dry type transformer i/c complete cleaning, removing dust, dirt, rust etc i/c pdg One coats of enamel paint on accessible surface area i/c checking the tightness of HT & LT cable terminations and all terminal connections for any occured overheating, tightening if required replacing the defective LT side gaskets of transformer terminal box, etc complete as required

Servicing of following Electrical panels including cleaning the inside dust, checking and tightening all the connections such as busbar, cables etc, tightening switch terminals/ busbar taping etc I/c removing dust deposit using vacuum cleaner and pdg minor repairs of switches etc, replacement of fused indication lamps/defective indication lamp holders and control fuse , replacing the damaged gaskets i/c cleaning & removing the rust on surface of panel , providing one coat of superior quality spray enamel paint on accessible area of panel, sign writing etc complete as required.

Main MV panel of approximate size (size 3.95mtr x2.15mtr x.0.75mtr ) comprising switches 630A OCB-2 Nos, 630 A TPN Bus coupler-1No, 400 A TPN-2 Nos, 250 A TPN- 6 Nos, 100A TPN-4Nos, 63A TPN-4Nos.

8 stage APFC panel with Ducatti make APFC Controller & capcitors, contactors etc

Checking, correcting and testing of pick up time and closing time of IDMT relay (Make EASUN REY ROLLE 2 Nos of over current and 1 No of earth fault relay) by injecting 5 amps current using testing kit i/c checking and correcting connected control wiring in the LT/HT panel, Checking shunt trip circuit, auxiliary switch, trip healthy indication , trip push button etc as required.

Painting of 6-pole structure with connected MS channels, angle iron, connecting rods of AB switches cable protection pipe and other accessories etc, with one coat of superior quality epoxy paint after thoroughly cleaning the surface for removing dust, rust, cleaning the insulators, checking/ tightening the overhead connections/ lines on pole structure, lightning arrestors from metering end to transformer etc. complete as required.

Complete painting of the angle iron welded mesh fencing around the pole structure i/c MS channel supports, MS weld wire mesh door etc with One coats of epoxy paint after complete cleaning the surface for removing dust, rust etc as required

Servicing of 11KV air break switch and the lever mechanism in the existing 11 KV pole structure for smooth operation of open close operations i/c cleaning , greasing the moving contacts, checking connections in the pole structure and switch, testing etc as reqd.

Checking, meggering for earth resistance of the existing earth pits, cleaning the joints and reconnecting, replacing corroded nut and bolts, washers etc with new ones etc as required.

Supply and replacing of following faulty items in the 11 kV structure i/c dismantling existing faulty accessories after checking, meggering etc as required.

DO Fuse metal parts ( Full set)

11 KV Lightning Arrester

11 KV AB switch metal parts ( moving & non moving spares for 1 phase)

Supply following accessories for 11KV substation etc as required.

Supply of ISI MARKED rubber mat suitable for HT supply as required.

Supply of 6 mm nominal thick rubber mat suitable for MV supply as required.

Rubber gloves of 11KV grade.

Replacing the existing defective flourescent tube light fittings on surface of wall / ceilng in substation room with new 20W LED tube light fittings i/c dismantling the defective, Supplying and fixing of new lights with all accessories testing etc as required.

Supply and fixing 450mm sweep 1400 RPM exhaust fans with suitable louvre on existing wall opening in substation room testing etc as required.

S/F space heater 100 watts with suitable thermostat in the existing HT Panel chamber i/c making connections and removing the old faulty heater , testing etc as required

Dismantling existing defective 18" dia exhaust fans with accessories from substation room etc as reqd.

Description of Work / Item(s)

Amount

Package 4- TE Koratty 1x63 KVA Outdoor Oil cooled Sub-station

Filtering of Transformer oil of 1No 63KVA out door Transformer up to desired value of dielectric strength, i/c arranging To and fro transportion of external filtering unit suitable to the site, furnishing the test certificate of approved agency etc as reqd.

Supplying and filling transformer oil for topping up the oil in the existing 11 KV Out door 63 KVA Transformer etc as reqd.

Recharging the breather using fresh silica gel after removing the hydrated gel ,cleaning the assembly, refilling with new gels, refixing etc as reqd.

Servicing of LT panel panel with 1No 125 Amps change over swith & 9 Nos SFU out goings including cleaning the inside dust, checking and tightening all the connections such as busbar, cables etc, tightening switch terminals/ busbar taping etc I/c removing dust deposit using vacuum cleaner and pdg minor repairs of switches etc, replacement of fused indication lamps/defective indication lamp holders and control fuse etc i/c removing th rust, painting with one coat of superior quality enamel paint on accessible out side area of panel etc as reqd.

Painting of 2-pole structure with connected MS channels, angle iron, connecting rods of AB switches cable protection pipe and other accessories etc, with one coat of superior quality epoxy paint after thoroughly cleaning the surface for removing dust, rust, cleaning the insulators, checking/ tightening the overhead connections/ lines on pole structure, lightning arrestors from metering end to transformer etc. complete as required.

Complete painting of the angle iron welded mesh fencing around the pole structure i/c MS channel supports, MS weld wire mesh door etc with One coats of epoxy paint after complete cleaning the surface for removing dust, rust etc as required

Painting the existing 63 KVA out door Transformer, metering kiosk, CT PT unit , LT switch cubicle i/c complete cleaning, removing dust, dirt, rust etc i/c pdg One coats of epoxy paint on accessible surface area i/c complete dismantling the T/F terminal connections, opening the top cover to arrest the ol leaking via LT terminal bushings, tightening the terminals, providing new gaskets, refixing , the T/F top cover and all other accessories, pdg HT reconnections , replacing the defective LT side gaskets of transformer terminal box, checking and tightening the LT side cable connections in transformer terminal box , testing commissioning etc complete as required

Servicing of 11KV air break switch and the lever mechanism in the existing 11 KV pole structure for smooth operation of open close operations i/c cleaning , greasing the moving contacts, checking connections in the pole structure and switch, testing etc as reqd.

Checking, meggering for earth resistance of the existing earth pits, cleaning the joints and reconnecting, replacing corroded nut and bolts, washers etc with new ones etc as required.

Supply and replacing of following faulty items in the 11 kV structure i/c dismantling existing faulty accessories after checking, meggering etc as required.

DO Fuse metal parts ( Full set)

11 KV Lightning Arrester

11 KV AB switch metal parts ( moving & non moving spares for 1 phase)

Colour washing the accessible area of the existing brick foundations of the 2 pole structure, metering kiosks, mesh fencing, LT switch unit, earth pits etc with two coats of superior quality water proof cement paint of approved colour and make, after complete cleaning of the surface for removing dust, old paint, grass roots, etc as required.

Description of Work / Item(s)

Amount

Package 5- TE Chalakkudy 2x250 KVA Indoor Dry type Sub-station

Servicing the existing 11 KV, 3 Panel VCB 800Amps (make Bieco Lawrie) with 1 incoming & 2 Outgoings HT Panel ( 1 No out going VCB in drawn out position due to fault) i/c cleaning the entire panel, after scrapping the inside and outside surface of each chamber alternatively with water paper and removing the dust, rust, and moisture contents, tightening nuts and bolts of the Bus bars, cable terminals and spouts, and improving the IR value by heating with a hot air blower after cleaning of accumulation of carbon deposits with CTC (Carbon Tetra Choride ), heating the interior of the panel board to expell moisture, applying two coats of moisture resistant winding varnish for all HT spouts and resin cast CTs, applying petroleum jelly in the contacts of VCBs , greasing the moving parts of VCB , reconnecting properly, etc i/c checking the control wiring and trip circuit, testing etc. complete as reqd. ( Note : 1 No VCB in irrepairable condition )

Servicing of dry type transformer, checking the tightness of HT & LT cable terminations and all terminal connections for any occured overheating, meggering the insulation level of the transformer, check for loose connections, condition of tape changers, terminal boards and general condition of the transformer. Clean and remove the dust with the help of a vacuum cleaner and a dry cloth, thereafter, use compressed air to remove any remaining dust and clean the ventilation channels of the coils and between the coils and the core, i/c arranging the heating after cleaning the accumualted dust from the transformer to achieve the required level of insulation etc as required.

Servicing of 1000Amps LT 4 pole ACB, M-PACT make i/c cleaning / checking all componets, mechanical parts, all moving and fixed contacts, auxilary contacts, all connections of CTs, control wiring, replacement of the minor components like springs , mechanical parts etc . i/c Lubricating all mechanical parts, cleaning contact tips, applying petroleum jelly on all contacts, refixing testing etc as required ( Work should be carried out by a qualified and skilled technician)

Spray painting the outside of the 250 kVA dry type transformer i/c complete cleaning, removing dust, dirt, rust etc i/c pdg One coats of enamel paint on accessible surface area i/c replacing the defective LT side gaskets of transformer terminal box, checking and tightening the LT side connections in transformer terminal box etc complete as required

Servicing of following Electrical panels including cleaning the inside dust, checking and tightening all the connections such as busbar, cables etc, tightening switch terminals/ busbar taping etc I/c removing dust deposit using vacuum cleaner and pdg minor repairs of switches etc, replacement of fused indication lamps/defective indication lamp holders and control fuse , replacing the damaged gaskets etc as required.

Main MV panel

8 stage APFC panel

Painting of 2-pole structure with connected MS channels, angle iron, connecting rods of AB switches cable protection pipe and other accessories etc, with one coat of superior quality epoxy paint after thoroughly cleaning the surface for removing dust, rust, cleaning the insulators, checking/ tightening the overhead connections/ lines on pole structure, lightning arrestors from metering end to transformer etc. complete as required.

Complete painting of the angle iron welded mesh fencing around the pole structure i/c MS channel supports, MS weld wire mesh door etc with One coats of epoxy paint after complete cleaning the surface for removing dust, rust etc as required

Servicing of 11KV air break switch and the lever mechanism in the existing 11 KV pole structure for smooth operation of open close operations i/c cleaning , greasing the moving contacts, checking connections in the pole structure and switch, testing etc as reqd.

Checking, meggering for earth resistance of the existing earth pits, cleaning the joints and reconnecting, replacing corroded nut and bolts, washers etc with new ones etc as required.

Supply and replacing of following faulty items in the 11 kV structure i/c dismantling existing faulty accessories after checking, meggering etc as required.

DO Fuse metal parts ( Full set)

11 KV Lightning Arrester

TECHNO ENGINEERING CORPORATION

TECHNO ENGINEERING CORPORATION

TECHNO ENGINEERING CORPORATION

TECHNO ENGINEERING CORPORATION

TECHNO ENGINEERING CORPORATION