REPAIR MAINT OF TRANSFORMER INCLUDING DEHYDRATION AT NAVAL DOCKYARD UNDER GE NW KUNJALI

Amount

Supplying , laying, Jointing testing and commissioning of HT UG cable, XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured,, 11000 volts grade (heavy duty) suitable for earthed system with aluminium conductor of size 3 core 185 Sqmm conforming to IS-7098 Part II laid in trenches, passing through pipes or fixed to walls with suitable size GI clamps and connecting up including taking out unserviceable cable complete all as specified.

-Ditto- all as sper item No 1.00 above but 3 core 240 Sqmm

M & L for Cable jointing kit for 11 KV (Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 50 sqmm to 95 sqmm power cable including dismantling old cable end termination joint of any description complete all as specified.

-Ditto- all as sper item No 3.00 above but suitable for 120 to 185 Sqmm XLPE, 3 core power cable .

-Ditto- all as sper item No 3.00 above but suitable for 240 to 300 sq.mm XLPE, 3 core power cable .

M & L Cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 50 to 95 Sqmm power cable including dismantling old cable end termination joint of any description complete all as specified.

-Ditto- all as sper item No 6.00 above but suitable for 120 to 185 Sqmm power cable

M & L Cable jointing kit for 11 KV (Earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 50 to 95 Sqmm power cable including dismantling old cable end termination joint of any description complete all as specified.

-Ditto- all as sper item No 8.00 above but suitable for 120 to 185 Sqmm power cable

Material & labour for rewinding of LT side winding with copper strip of suitable size/gauge, fixing the coil in position in core assembly and making connection as per existing pattern including providing insulation, varnish etc complete all as specified and directed by Engr-in-Charge.

Material & labour for rewinding of HT side coil with supper enamelled Copper wire of suitable size/gauge, fixing the coil in position in core assembly and making connection as per existing pattern including providing insulation,varnish etc complete all as specified and directed by Engr-in-Charge. Note- Rewinding shall be carried out at OEM authorised workshop

Material and labour for carefully disconnecting the HT/LT side and earthing connections of the transformer, Lifting transformer with the help of crane, loading on suitable vehicle to transport it to the authorised workshop of OEM and Unloading at workshop for servicing and after overhauling transport back to worksite, unloading and lifting with help of crane and installed at same place as directed, transformer capacity up to 1000 KVA (i) Receive & unload the transformer (ii) Drain out oil from chamber. (iii) Opening top cover, disconnecting winding connection from bushings and taking out carefully core assembly complete with winding. (iv) Checking compactness of core & tightening the same where required. (v) Chemical washing of winding to remove dirt,dust & carbon particles (vi) Cleaning of oil tank to remove oil sludge and applying two coats of anticorrosive paint to inner surface of tank over a coat of zinc chromate primer (vii) Refixing of core & winding assembly and making connection with HT/LT bushing . (viii) Replacement of worn out gaskets & nut/bolts as per existing (ix) Refilling of oil duly filtered/dehydrated/fresh oil (to be measured & paid separately under respective items). (x) Windings to be done with new copper conductors of core and phase. All other insulation material used will be new one (to be measured & paid separately under respective item). (xi) Complete overhauling shall be carried out as per OEM directions and tested after installation complete.

-Ditto- all as per item No 12.00 above but transformer capacity 1001 KVA to 2500 KVA

M&L for shifting transformer upto 2500 kVA, 6.6-11KV/433V, from location inside Dockyard and connecting HT/LT side to provide temporary supply during repair of transformer and disconnecting HT/LT connections before installations of repaired transformer complete all as directed by Engineer-in-Charge.

S & F in repairs HV side Brass studs threaded both ends of suitable size and length including metal and rubber rings, nuts, bolts washers, etc. suitable for 500 to 1600 KVA Transformer ( Indoor or Outdoor type), 6.6-11KV/433V, step down/ step up of any make / model complete all as directed

S & F in repairs HV side Brass studs threaded both ends of suitable size and length including metal and rubber rings. nuts, bolts, washers, etc. suitable for above 1600 KVA Transformer ( Indoor or Outdoor type), 6.6-11KV/433V, step down/ step up of any make / model complete all as directed

S & F in repairs LV side Brass studs threaded both ends of suitable size and length including metal and rubber rings. nuts, bolts, washers, etc. suitable for 500 to 1600 KVA Transformer ( Indoor or Outdoor type), 6.6-11KV/433V, step down/ step up, of any make / model complete all as directed

S & F in repairs LV side Brass studs threaded both ends of suitable size and length including metal and rubber rings. nuts, bolts, washers, etc. suitable for 1600 KVA to 2500 KVA transformer , Outdoor type, 6.6-11KV/ 433V step down/ step up ) of any make / model complete all as directed

S & F in repairs HV/LV side Porcelain Bushing / Insulator of suitable size upto 2500KVA Transformer, Outdoor type, 6.6- 11KV/ 433V , step down/step up, of any make / model complete all as directed.

S & F in repairs Silica Gel container with first fill of Silica Gel transparent type suitable for transformer of capacity 500 KVA to 1250 KVA compete all as directed

S & F in repairs Silica Gel container with first fill of Silica Gel transparent type suitable for transformer of capacity above 1250 KVA to 2500 Kva compete all as directed

Testing of di-electric strength of transformer oil of transformer indoor/outdoor type,6.6KV/433 Volts, before filteration and to remove moisture and impurities and to improve di-electric strength above 48 KV /minute through filtration plant incl filling of new transformer oil for topping up, testing complete all as specified. Filtration of transformer oil by electrically operated transformer oil filtration plant to achive a test result of 48 KV/min for distribution transformer and 80 KV/ minute for power transformer for 2.5 mm gap. Note: i) Testing machine and Transformer oil filtration plant as well as dehydration facility shall be provided by the contractor and quoted rate shall includes the same . ii) New transformer oil shall be measured and paid separatelly under respective items.

Supply only Transformer Oil as per IS 335/93 dehydrated to give BDV value not less than 50 KV when tested with 2.5mm gap electrode complete all as specified.

Supply only Silica Gel of existing quality complete all as specified.

S & F in repairs following parts from transformer of capacity 500 kVA to 2500 kVA, 6.6/6.6-11KV/ 433V as per existing make :-

Oil level indicator

Tap changer

Dial type 100mm dia oil temp meter

Air release plug assembly

Drain plug

Gun metal oil drain valve 25mm /40mm

M & L for scraping thoroughly existing corroded paint from Indoor/Outdoor type, Step up/ step down/ step up Transformer of capacity 6.6/6.6-11KV/ 433 V installed at different locations of ND area, filling cavities and applying one coat of silicon acrylic heat resistant paint by spraying painting of approved colour and writing the details such as, SM/MES No. etc. complete all as specified for following capacity.

631 to 1000 KVA capacity

1001 to 1600 KVA capacity

1601 to 2500 KVA capacity

Supply and fixing in repairs transformer protection relay suitable for upto 2500 KVA capacity complete all as directed

Supply and fixing in repairs transformer limit switch suitable for upto 2500 KVA capacity comlpete all as directed

Supply and erection of single phase blowers suitable for transformer of capacity upto 2500 kva complete all as directed

Supply and erection of heaters for transformer capacity upto 2500 kva compete all as directed

Supply and erection of accessories such as control wiring , lugs, connector, ferrules in fabricating box of transformer Dry type of capacity upto 2500 KVA complete all as directed

Supply and fixing in repairs Temperature Sensor , RTD Sensors suitable for Dry type transformer upto 2500 KVA capacity complete all as directed

Supply and fixing in repairs surge arrestor for Dry Type transformer 10 KA, 9KV upto 2500 KVA complete all as directed

Supply and fixing in repairs support insulators suitable for Dry Type transformer upto 2500 KVA capacity complete all as directed

M & L for PCC 1:4:8 Type D2 using 40 mm graded stone aggregate in foundation including necessary formwork and finishing the exposed surface of concrete even and smooth without using extra cement complete all as specified.

M & L for PCC 1:3:6 Type C2 using 40 mm graded stone aggregated in stay foundation, filling and mass concrete complete all as directed.

Excavation in trenches not exceeding 1.5m wide and not exceeding 1.5m depth for laying of cable/ GI pipe and getting out in soft /loose soil complete all as specified and directed.

Returning filling in , including spreading, leveling, watering and well ramming in layers not exc 25 cm.

Removing surplus soil to a distance outside MD land and depositing where directed at a level not exceeding 1.5m above the starting point complete all as specified and directed.

M & L for dry river sand as cushioning for protection of UG cable including punning of sand in layers all as specified in SSR Part I. Note: Thickness after punning down shall be measured and paid

M&L for hardcore of broken stone or boulders of gauge n. exc 63mm, deposited, spread and leveled in layers n. exc 15cm thick watered and rammed to true surface complete all as specified.

M&L for hardcore of broken stone or boulders of gauge exc 63mm, deposited, spread and leveled in layers n. exc 15cm thick watered and rammed to true surface complete all as specified.

Supplying and laying reinforced precast concrete cable cover, class LV type 1 flat of size 300 mm x 180mm x 40 mm complete all as specified and directed by Engineer-in-Charge.

Material and labour for laying 100 mm bore GI Tubing medium grade for cable potection in road/floor complete all as specified.

Supply of JEF ECO SAFE Maintenance Free Grounding Solution set comprising of High tensile low carbon steel rod of 3 Mts length & 32 mm dia with 250 micron ( average ) molecularly bonded copper on the outer surface to confirm with requirements of UL467 along with Back-fill compound strictly be a Carbon based conductive concrete type which has a resistivity of less than 0.12 Ohm Mtr as per Clause 14.5D of IEEE : 80 standard. Back-fill compound should be electronically conductive ( Like in metals ) and should not depend on moisture for conduction. JEF ECO SAFE compound shall be supplied in 50 Pound Bag. ( 1 Bag required per earthing set). Back-fill comound should be environment friendly, should solidify when mixed with water and set like concrete and should not leach / diffuse into the ground. A suitable earth terminaton clamp should also be supplied Note : Back-fill compund shall not be mixed with any soil while pouring in the bore hole.

Material and labour for GI strip of size 32x6mm as earth continuity conductor burried in ground or drawn in pipe or fixed to wall on saddle complete all as specified..

AGRAWAL ASSOCIATES (BID ID -3262404)

Shree Ayyappa Engineering (BID ID -3261291)

Darpan Construction (BID ID -3262097)

pk Enterprises (BID ID -3262485)

sapana enterprises (BID ID -3261853)

DARSHAN CONSTRUCTION Co. (BID ID -3262522)

Nexus Infratech (BID ID -3260161)