REPAIR, REPLACEMENT, MAINT OF HT CTs 22 KV, INDOOR / OUTDOOR BREAKERS, HT VCB AND REPAIR / MAINTENANCE OF TRANSFORMER, DEHYDRATION / FILTRATION OF TRANSFORMER OIL AND OTHER MISC WORKS AT NAVAL STATION KARANJA

Amount

Dismantling top cover alongwith conservator tank for filtration of Transformer oil and after draining out transformer oil up to terminal level in situ by dismantling copper bus bars HT/LV Bushing and earthing strips, replacement of LT/HT bushing and terminal rod of brass gasket, nuts, bolts & washers etc. Refitting top cover & conservator tank after cleaning and filtration, removing the sludge , reconnecting HT/LT cable/conductor with bushings and earthing strips,& filtration of transformer oil including toping up of transformer oil by adding new transformer oil having 60 KV dielectric strength and charging/testing the transformer on load complete all as specified and directed by Engineer-in-charge, for transformer of rating upto 160 KVA capacity. Notes : (i) Contractor should make his own arrangement of filtration plant at each transformer sites for filtration of transformer oil including provision of electric supply to the filtration plant. (ii) New transformer oil shall be measured and paid separately. (iii) Cost of HT/LT bushing and terminal rod will be measured and paid separately . (iv) Filtration of oil will be measured separately. (v) Contractor have to test di-electric strength breakdown voltage before and after filtration of oil and record of the same duly signed by Engineer in charge & contractor to be kept on record.

-Ditto - all as per item No 1.00 here-in-before but for transformer of rating 200 KVA.

-Ditto - all as per item No 1.00 here-in-before above but for transformer of rating 250 KVA.

-Ditto - all as per item No 1.00 here-in-before above but for transformer of rating 315 KVA.

-Ditto - all as per item No 1.00 here-in-before above but for transformer of rating 400 KVA.

-Ditto - all as per item No 1.00 here-in-before above but for transformer of rating 500 KVA.

-Ditto - all as per item No 1.00 here-in-before above but for transformer of rating 630 KVA.

-Ditto - all as per item No 1.00 here-in-before above but for transformer of rating 1000 KVA.

Supply only the following spare parts of transformer 22 /0.433 KV operated in item Nos 1.00 to 8.00:

a) HV Bushings :- i) 22 KV from up to 160 KVA

ii) 22 KV from 200 KVA to 630 KVA

iii) 22 KV 1000 KVA

b) HV terminal rod with nut bolts, caps etc :- i) 22 KV from up to 160 KVA

ii) 22 KV from 200 KVA to 630 KVA

iii) 22 KV 1000 KVA

c) LV Bushings :- i) 22 KV from up to 160 KVA

ii) 22 KV from 200 KVA to 630 KVA

iii) 22 KV 1000 KVA

d) LV terminal rod with nut bolts, caps etc :- i) 22 KV from up to 160 KVA

ii) 22 KV from 200 KVA to 630 KVA

iii) 22 KV 1000 KVA

e) LT Brass connectors :- i) 12 mm

iii) 30 mm

Supply and Fix in repairs Dial type temperature gauge 100mm dia with dual calibration in degree Celsius and degree Fahrenheit, range 0 to 100 and equivalent degree Fahrenheit complete with capillary tube and sensor suitable for transformer of any rating, complete all as specified and directed by Engr-in-Charge.

Supply and filling new transformer oil having 60 KV di-electric strength and conforming to IS : 335 for replacement or topping up to oil level mark at the conservator, complete all as specified and directed by Engr-in-Charge.

Material for rewinding of transformer core with same numbers/grade of copper enamelled conductor with same size of turns as per manufacturer's specification and testing and commissioning transformers after repair, complete all as specified and directed by Engr-in-Charge.

Material for reinsulation of copper windings (LT and HT), Class B, with Electrical Grade Insulating Kraft paper all confirming to IEC-60554-3-5 (1984), complete all as specified and directed by Engr-in-Charge.

Filtration of transformer oil, in situ, to achieve dielectric strength of the oil not less than 50 KV with 2.5 mm gap, complete all as specified and directed by Engr-in-Charge. Note :- Contractor will submit before & after testing report of transformer oil.

Disconnecting HT/LT and earth termination connections from transformer, taking down the transformers from plinth/platform and loading into the vehicle; transporting the same to contractor workshop for carrying out necessary repairs and reconnecting HT/LT connections at site and charging the transformer on load, commissioning and testing including megger test at site, complete all as specified and directed by Engr-in-Charge.

Draining out transformer oil, dismantling top cover alongwith conservator tank, taking out core assembly after disconnecting connections, rewinding with same size and type of copper conductor and number of turns and insulating material such as paper insulator sleeves, heating etc. Putting back the core assembly into the tank after removing sludge and replacement of HT & LT bushing complete with brass terminal, refixing top cover and conservator including replacement of gasket, nut, bolts & washers (filling new transformer oil having 60 KV dielectric strength and carrying out type tests as per IS 2026 in presence of Engineer - in - charge for the following capacities :- Notes :- (i) New transformer oil and its filling shall be measured and paid separately under relevant items of schedule. (ii) Cost of rewinding material, insulation material and spares of transformer shall be measured and paid separately under relevant item of Schedule. (iii) Replacement of spares will be on required basis all as directed by Engr-in-Charge.

a) 75 to 160 KVA

b) 200 to 315 KVA

c) 400 to 1000 KVA

Disconnecting HT/ LT and earth termination connections from Trolley Mounted Transformer (500 KVA Cap.) and towing the same to a location, within 5 KMs, as directed by Engr-in-Charge including Material and Labour for making of HT/ LT and earth termination connections of the Trolley Mounted Transformer to the existing electric distribution system in Indoor/Outdoor Substation, complete all as specified and directed by Engr-in-Charge. Notes :- (a) Trolley Mounted transformer will be issued to contractor by MES however Contractor has to make his own arrangements of towing vehicle. (b) The job also includes disconnecting of HT/ LT and earth termination connections of Trolley Mounted Transformer and towing the same to a location as directed by Engr-in-Charge.

Testing of transformers of various capacities installed at various locations at Naval Station Karanja by performing following tests, complete all as specified and directed by Engr-in-Charge :- 1. IR Value on L.V & H.V side using 500 V & 5KV Megger respectively. 2. Ratio on all the taps. 3. Magnetic Balance tests on L.V & H.V. 4. Vector group. 5. Magnetizing current. 6. Winding Resistance Test on H.V & LV terminals. Notes : (i) Contractor should make his own arrangement of testing equipments and electric supply so required. (ii) A detailed Test Report should be submitted to Engr-in-Charge.

Supply and Fix in repairs heat shrink right angled boots for XLPE 22 KV 120 Sqmm cable including dismantling of HT cable from HT side of Transformer / HT Breakers, complete all as specified and directed by Engr-in-Charge.

Material and Labour in repair for Heat shrinkable cable end termination joint including jointing Kit indoor/outdoor type (touch proof) suitable for earthed 3 core 95/120 sqmm HT 22KV XLPE aluminium conductor cable and HV test after jointing and connecting up, complete all as specified and directed by Engr-in-Charge. Make:- Raychem/ XICON/ M-Seal/Denson

Material and Labour in repair for Heat Shrinkable straight through jointing kit with all necessary jointing material suitable for HT 22 KV XLPE 3 core 95/120 sqmm aluminium conductor cable, complete all as specified and directed by Engr-in-Charge. Make- Raychem/ XICON/ M-Seal/Denson

Supply and Fix in repairs breather assembly with silica gel suitable in situ for transformer of any rating, complete all as specified and directed by Engr-in-Charge.

Supply and fixing CRC bottle spray of 500 ml for opening of rusty surfaces and rusty nut bolts, complete all as specified and directed by Engr-in-Charge.

Taking out dry type transformer of capacity 100 KVA to 750 KVA & shifted to the contractor workshop with necessary arrangements by giving the supply with trolley mounted transformer and refixing the same after complete repairs, all as specified and directed by Engr-in-Charge.

Material and Labour for preparation of old painted surfaces of 100 KVA transformer with scrapers, any number of coats, any width or girth and applying two coats of synthetic enamel paint by spray painted including writing 5mm/MES numbers, complete all as specified and directed by Engr-in-Charge.

-Ditto- all as per item No 25.00 here-in-before but 160 KVA transformer.

-Ditto- all as per item No 25.00 here-in-before but 200/250 KVA transformer

-Ditto- all as per item No 25.00 here-in-before but 315 KVA transformer

-Ditto- all as per item No 25.00 here-in-before but 400/500 KVA transformer

-Ditto- all as per item No 25.00 here-in-before but 630 KVA transformer

-Ditto- all as per item No 25.00 here-in-before but 1000 KVA transformer

Material and Labour for cleaning and checking the LT/HT connections of dry type transformers and taking out the moisture from the cores of the transformer of capacity 62.5 kVA to 250 KVA all as specified and as directed by Engineer-in-charge

Material and Labour for cleaning and checking the LT/HT connections of dry type transformers and taking out the moisture from the cores of the transformer of capacity 315 KVA to 750 KVA, complete all as specified and directed by Engr-in-Charge.

Material and Labour for arresting the leakage and checking out of the LT/HT connections from the transformers of capacity 75 KVA to 250 KVA, complete all as specified and directed by Engr-in-Charge.

Material and Labour for arresting the leakage and checking out of the LT/HT connections from the transformers of capacity 315 KVA to 500 KVA, complete all as specified and directed by Engr-in-Charge.

Material and Labour for arresting the leakage and checking out of the LT/HT connections from the transformers of capacity 625 KVA to 1000 KVA , complete all as specified and directed by Engr-in-Charge.

Periodical Check / preventive maint of HT VCB/RMU 22 KV 800 Amps, 50 Hz yearly 3 times, complete all as specified and directed by Engr-in-Charge as under :- (a) Checking the closing & opening operation of VCB and functional checks and Repair/ Replacement of the defective components. (b) Overhauling and Calibration of relays (secondary injection/Primary injection on each multiple setting of relays). (c) Setting and coordination of relays. (d) Checking and recording of IR value of VCB trolley and panel. (e) Checking/repairing/rectification of the control wiring. (f) Replacement of panel heater 80 watt. (g) Replacement of worn out bushing CT/Busbar support insulators (h) Replacement of worn out bushing PT/Busbar support insulators (j) Replacement of unserviceable and Open circuit CT's. (k) Checking fibre plates, gaskets and applying multi grease to the mechanical parts & dry graphite conductive sealant to contacts of PT etc. & re-assembling the same and commissioning complete to entire satisfaction of Engineer-in-Charge. (l) Testing of polarities of CT's. (m) High voltage testing with high voltage tester of CT & Breaker pole to withstand working pressure of HT 22 KV to ascertain serviceability and spare parts found defective to be replaced for smooth functioning as directed by Engineer-in-Charge. (n) Labour only for Opening the busbar chamber of HT 22KV VCB panel board cleaning the bus bar chamber, inspect the CT's wiring, spout insulator & bus-bar joints & tightening if required & heating up with hot air blower to remove moisture, meggering, HV testing applying TRTPPEX(B) supplied against Sl Item No 38.02 here-in-after to bus bar & commissioning complete all as specified & directed by Engineer-in-charge.

Notes:- (i) All spares required for replacement shall be measured and paid separately under respective item of schedule here-in-after as supply only. (ii) Machine grease, oil, liquid sealant and any minor item costing upto Rs 250 will be included in the unit rate of above item and for satisfactory function of the breakers and no extra cost will be allowed. Decision of accepting officer in this regard will remain final & binding. (iii) The overhauling of HT breakers to be carried out either through OEM's service Engineer/authorised dealer/San & Engg consultant /Triotech consultant/ those who posses HT handling license.

Supply only following spare parts required for item No 37.00 here-in-before suitable for VCB of 800 Amps all as per sample :- Note:- the element of fixing of spare is already included in respective Sl Item No 37.00 here-in-before)

Spout insulator (Epoxy)

TRTPPX (B) for HT 22 KV for breaker

Current Transformer 22 KV single phase indoor Resin cast CT Ratio 30-15/5-5 Amps Class 1.0 insulation level 28 KV/75 KV as per IS 2075

Strip type heater 80 watt

Closing coil

Tripping coil

PT Primary fuse 22 KV 23 Amps

Control fuse 2 Amps with HRC fuse and fuse holder in existing panel and as specified and directed.

Insulation Tape suitable for HT 22 KV 1.5" wide.

VCB gasket suitable for VCB 22KV 800 Amps indoor type all as specified and directed.

Baffle pot assembly suitable for VCB, 22 KV, 800 Amps, indoor type all as specified and directed.

Main moving contact bolted/threaded type suitable for VCB, 22KV, 800Amps, indoor type all as specified and directed.

PT single phase indoor Resin cast PT Ratio 22kV/R3/110V/R3 Class 1.0, 200VA.

HT bushing with spindle

Thermostat - 0-100 Deg. Celsius

Moving contact rod

Upper fix contact

Lower fix contact

Top and bottom male contact

Female contact

Support insulator

Partition fiber plate

Copper strip of 800 Amps (per Kg)

Material and Labour for earthing complete with GI earth plate electrode of size 60cm x 60cm x 6 mm thick burried 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 galvanised 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 40x40x6mm 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 40mm dia medium grade pipe for watering 40mm dia light grade, GI pipe for lead protection in and 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, all as specified & directed by Engr-in-Charge.

Supply and Fix earth continuity conductor or main earthing lead fixed to wall on batten or fixed to pole copper strip 32 x 6 mm, complete all as specified and directed by Engr-in-Charge.

Disconnecting Transformer from HT and LT sides and earth termination connections from Transformer, taking down the Transformer from plinth/platform and loading into the vehicle; transporting the same to near by Platform/SS and reconnecting Transformer at site and charging Transformer on load, commissioning and testing at site, complete all as specified and directed by Engr-in-Charge.

Disconnecting LT Transformer Panel cable and earth termination connections from LT Panels, taking down the LT Panel from plinth/platform and loading into the vehicle; transporting the same to near by Platform/SS and reconnecting LT Panels at site and charging the LT Panels on load, commissioning and testing at site, all as specified & directed by Engr-in-Charge.

Disconnecting LT DG Panel cable and earth termination connections from LT Panels, taking down the LT Panel from plinth/platform and loading into the vehicle; transporting the same to near by Platform/SS and reconnecting LT Panels at site and charging the LT Panels on load, commissioning and testing at site, all as specified & directed by Engr-in-Charge.

Disconnecting LT APFC Panel cable and earth termination connections from LT Panels, taking down the LT Panel from plinth/platform and loading into the vehicle; transporting the same to near by Platform/SS and reconnecting LT Panels at site and charging the LT Panels on load, commissioning and testing at site, all as specified & directed by Engr-in-Charge.

Disconnecting LT Sub Panel cable and earth termination connections from LT Panels, taking down the LT Panel from plinth/platform and loading into the vehicle; transporting the same to near by Platform/SS and reconnecting LT Panels at site and charging the LT Panels on load, commissioning and testing at site, all as specified & directed by Engr-in-Charge.

Supply, laying in repairs, in trenches /ducts/fixing on pole/STR with suitable size of GI clamp made out of GI strip 32 mm x 6 mm, XLPE HT insulated, screened, earthed, PVC bedded, galvanised steel strip or wire armoured, electric power cable (heavy duty) of size 3 x 120sqmm with aluminium conductor suitable for 22 KV grade as per relevant IS including latest amendment for IS (ISI marked cable) testing, commissioning along with HT cable route indicator, complete all as specified and directed by Engr-in-Charge. Notes :- (a) Earth work, EHV cable cover, sand cushioning & GI pipe will be measured and paid separately. (b) High voltage test to be conducted at site with suitable voltage before & after laying of HT cable & reading shall be recorded jointly & test report to be submitted in triplicate to Engr-in-Charge. Cost of the same shall be deemed to be included in the unit rate quoted above.

Taking out carefully cable covers & HT cable from excavated trench/duct/pole of size 120 sqmm 3 core, complete all as specified and directed by Engr-in-Charge.

Relaying of HT cable of size 120 sqmm 3 core in trench/duct/pipe obtained from item No 47.00 here-in-before, complete all as specified and directed by Engr-in-Charge.

Excavation in trenches for not exc 1.5 metre wide and not exc 1.5 metre depth and getting out in soft/loose soil including taking out faulty cable/cable, cable covers and GI pipe, complete all as specified and directed by Engr-in-Charge.

Removing excavated materials not exc 50m and depositing where directed at a level not exc 1.5m above the Starting point, complete all as specified and directed by Engr-in-Charge.

Returning filling in including spreading levelling watering and well ramming in layers not exc 25cm, complete all as specified and directed by Engr-in-Charge.

Supply and lay sand cushioning to under ground HT cable complete all as specified in SSR Part-I and as directed by Engineer-in-charge.

Supply and Laying reinforced precast concrete cable cover laid width wise factory made, class EHV type 1 with peak size 450 mm x 230 mm x 50 mm, complete all as specified and directed by Engr-in-Charge.

Laying only precast concrete cover of size 450mm x 230mm x 50 mm obtained from item No 47.00 here-in-before, complete all as specified and directed by Engr-in-Charge.

pk Enterprises (BID ID -3352583)

Nexus Infratech (BID ID -3353022)

SREE HARITHA ASSOCIATES (BID ID -3352194)

K A ELECTRIC CO (BID ID -3352686)

somnath engineering corporation (BID ID -3352810)