Bharat Sanchar Nigam Limited-BSNL has published Tender For Providing Annual Maintenance Of Transformer Substation And Allied Works At Various Telephone Exchanges In Kerala Circle. Submission Date for this Tender is 16-04-2024. Transformer Supply Tenders in Thiruvananthapuram Kerala. Bidders can get complete Tender details and download the document.
| Sl. No. | Item Description |
| 1 | Package 1- TE Tripunithura 2 x 400 KVA Indoor Oil cooled Sub-station |
| 2 | Supplying and filling of tested quality fresh transformer oil suitable for 11 KV systemto replace the damaged oil /topping up etc complete as required |
| 3 | Filtering of Transformer oil of 2 Nos400 KVA Indoor Transformer& HT OCB Panelup 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 completeas reqd. |
| 4 | Supply and replacing breather with fresh silica gel for the existing 160 KVA transformer etc complete as required |
| 5 | 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 faultyspace 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 etccomplete as required. |
| 6 | Arresting the oil leak through the HT bush of the HToil switchof the existing 3 panel HTPaneli/copening 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. |
| 7 | Painting of the 4-pole structure with connected MS channels,angle iron, connecting rods of AB switches, cable protection pipe and other accessories, etc withone coat of superior quality aluminium paintafter thoroughly cleaning the surface for removing dust, rust etc, applying zinc chromateprimer where ever required, cleaning the insulators, checking/ tightening the overhead connections/ lines on pole structure from metering end to transformer , colour washing of thefoundationsof 4polestructure,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 paintetc as required.etc complete as required. |
| 8 | Painting the existingTOD Meter Kioski/c complete cleaning, removing dust, dirt, rustetc , applying zinc chromateprimer where ever required, followed by one coat of superior quality grey synthetic enamel paint etc compete as required |
| 9 | Complete painting of the angle iron welded mesh fencingaround the pole structure i/c MS channel supports, MS weld wire mesh door etc with One coats of epoxy primer followed by twocoats of superior quality Aluminium paintafter complete cleaning the surface for removing dust, rustetc complete as required |
| 10 | 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. |
| 11 | 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 , meggeringthe same with insulation megger of suitable rating ( 1000V -LT/5000V-HT) , cleaning of allcontacts ,applying petroleum jelly , tightening of allHT < terminations ,earth connections, measuring the earth resistance , cleaning of 2 Nos 400 KVA transformersetc ascomplete required. (Note : Testing shall be done in the presence of Engineer in charge or his authorised subordinate andnecessary test result should be submitted) |
| 12 | Cleaning the joints of the existing earth stations and reconnecting, replacing corroded nut and bolts with newsteel nuts & bolts, washers etc complete as required. |
| 13 | Removing the grass, vegetation roots, bushes, creepersand climbers , debris , cleaning,inside the existing HT structure yard andoutside surroundingarea , cleaning , filtering, levelling the stone aggregate, etc complete as required. |
| 14 | Supply and replacing of following faulty items in the 11 kV structure i/c dismantling existing faulty accessories after checking, meggering etc as required. |
| 15 | 11 kV Post top insulators |
| 16 | DO Fuse metal parts ( Full set) |
| 17 | 11 KV Lightning Arrester |
| 18 | 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 |
| 19 | Servicing the following rating Air Circuit Breakers (ACBs)in the main MV Panel ,drawing out the ACB, carrying out the standard servicing i/clubricating 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. |
| 20 | 1000 AACB (M/sSIEMENS) |
| 21 | 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 correctingconnected control wiring in the LT/HT panel,Checking shunt trip circuit, auxiliary switch, trip healthy indication , trip push button etc as required. |
| 22 | 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) |
| 23 | a] MV Panel |
| 24 | Incoming |
| 25 | i)1000 ACB- 5 Nos. (I/c 1 no. bus coupler)( Make:M/s SIEMENS) |
| 26 | Outgoing |
| 27 | i) 800ATPN MCCB - 2 Nos ii) 400A TPN SDF - 2 Nos. iii) 250A TPN SDF - 4 Nos. iv) 200A TPN SDF - 2 Nos. |
| 28 | b] Capacitor Panel |
| 29 | 50 KVAR APFC panel with 6 Nos capacitors of various sizes with contactors,relays,indication lamps etc. |
| 30 | Complete as above( a to b) |
| 31 | Supply and fixing the following items to replace the faulty one i/c giving connection , testing etc as required |
| 32 | 6A LT Volt Meter Selector Switch ( Type : VSS suitable for measuring voltage between phases & individual phases to neutral with OFF,Make - M/s Salzar , Model 61313 SAB13TDYR or SS make) |
| 33 | 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 . |
| 34 | S/Fhand gloves suitable for operation of HT equipment of superior quality etc as required. |
| 35 | Supplying and fixing earth discharge rod with suitable length of flexible copper wire for earthing 11KV DP structures /HT cable etc as reqd. |
| 36 | S/F of 18 W, 4 feet LEDbattentube 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) |
| 37 | 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) |
| 38 | 5/6 amps switch |
| 39 | 3 pin 5/6 amp socket outlet |
| 40 | 15/16 amp switch |
| 41 | 6 pin 15/16 amp socket outlet |
| 42 | Complete cleaning of the existingsub 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 |
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